CN111777726A - Formula for improving electrode conductivity - Google Patents
Formula for improving electrode conductivity Download PDFInfo
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- CN111777726A CN111777726A CN202010440915.XA CN202010440915A CN111777726A CN 111777726 A CN111777726 A CN 111777726A CN 202010440915 A CN202010440915 A CN 202010440915A CN 111777726 A CN111777726 A CN 111777726A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 22
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 21
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims abstract description 11
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 30
- 238000007664 blowing Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 230000001965 increasing effect Effects 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- NLSFWPFWEPGCJJ-UHFFFAOYSA-N 2-methylprop-2-enoyloxysilicon Chemical compound CC(=C)C(=O)O[Si] NLSFWPFWEPGCJJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical group CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 6
- 238000009472 formulation Methods 0.000 claims 5
- 230000002708 enhancing effect Effects 0.000 claims 3
- 239000000463 material Substances 0.000 abstract description 7
- 239000002086 nanomaterial Substances 0.000 abstract description 7
- 239000013543 active substance Substances 0.000 abstract description 5
- 229910021392 nanocarbon Inorganic materials 0.000 abstract description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 3
- 239000002105 nanoparticle Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 238000012856 packing Methods 0.000 description 12
- 239000006258 conductive agent Substances 0.000 description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
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- 239000000499 gel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention belongs to the technical field of conductive electrode plates, and particularly relates to a formula for improving the conductivity of an electrode, which comprises the following components in parts by weight: 15-20% of active functional monomer, 1-2.5% of acrylic acid, 5-10% of binder, 3-5% of graphene, 1-2.5% of carbon nanotube, 0.5-2% of conductive carbon black, 45-60% of dissolving agent and 10-15% of carrier; preparing an electrode plate by the component substances; according to the invention, graphene, a carbon nanotube and conductive carbon black are added into an electrode plate, the graphene is in a sheet nanostructure material shape, the carbon nanotube is in a tubular nanostructure shape, the conductive carbon black is in a spherical nanoparticle shape, and the different microstructure shapes of the several carbon nanotubes determine the respective length of the conductive characteristics; the three nano-carbon structure materials are organically combined, so that a two-dimensional structure surface of graphene, a one-dimensional structure line of a carbon nano-tube and a zero-dimensional structure point of conductive carbon black are fully exerted, a conductive network is simultaneously constructed on different scales of the active substance of the lithium ion battery electrode, and the performance of the battery is favorably exerted.
Description
Technical Field
The invention belongs to the technical field of conductive electrode plates, and particularly relates to a formula for improving the conductivity of an electrode.
Background
The electrode plates are various and comprise massage electrode plates, physical therapy electrode plates, conductive electrode plates, self-adhesive electrode plates, non-woven fabric electrode plates, electrocardio electrode plates, medical electrode plates, silica gel electrode plates, heating electrode plates, breast augmentation electrode plates, therapeutic apparatus connecting wires and the like.
The electrode plates are used for physical therapy, and the conventional electrode plates are attached to the body through the two electrode plates and are respectively connected with a power supply, so that a passage is formed between the two electrode plates, and the physical therapy effect is achieved. The medical pressure-sensitive conductive adhesive is a conductive high molecular material, can be extensively used in various medical instruments, can be used for making disposable electrocardio-electrode, etc., and compared with metal conductor product, the conductive electrode plate in the industry can be fully and effectively proved to have higher quality, it has no rust, no electroerosion, and uniform electrical impedance, and its per square inch is only about 20OHM, and can be stuck on the conductive electrode plate of human body, and can be used in various middle and low frequency physiotherapy instruments, also can be used in medical and beauty treatment industries, and can be used in aviation field. For the conductivity of the electrode slice with the coating on the surface, the prior gel electrode slice has poor conductivity, large resistance and uneven conductivity, and the viscosity of the electrode slice is too weak, especially after the electrode slice is stored for a certain time, the viscosity of the electrode slice can be obviously reduced, and the resistance is further increased when the electrode slice is used, thereby influencing the use effect.
Some technical solutions related to electrode sheets also appear in the prior art, for example, a chinese patent with application number 2019108443689 discloses a high-conductivity electrode sheet, and a preparation method and an application thereof, including the following raw materials by weight: 15-30 parts of active functional monomer, 0.5-2.5 parts of acrylic acid, 1.5-3.5 parts of active diluent crosslinking agent, 0.1-0.5 part of inorganic base, 0.1-0.5 part of initiator, 35-55 parts of water-retaining agent and 25-45 parts of solvent. Also provides a preparation method and application of the high-conductivity electrode plate; however, in the prior art, the components of the electrode plate are complex, the conductive efficiency is limited by the raw material manufacturing process, and higher conductivity cannot be achieved.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that the electrode plate in the prior art has complex components, the conductive efficiency is limited by a raw material manufacturing process and can not reach higher conductivity, and simultaneously, when the internal resistance of the conventional electrode plate is measured, a sample is easy to deform in a sampling process and the measurement error of the conductivity of the sample is increased, the invention provides the formula for improving the conductivity of the electrode.
The technical scheme adopted by the invention for solving the technical problems is as follows: the formula for improving the conductivity of the electrode comprises the following components in parts by weight:
15-20% of active functional monomer;
1-2.5% of acrylic acid;
5-10% of a binder;
3-5% of graphene;
1-2.5% of carbon nanotubes;
0.5 to 2 percent of conductive carbon black;
45-60% of a dissolving agent;
10-15% of a carrier;
preparing an electrode plate by the component substances;
the material morphology of the graphene is a sheet nanostructure, the carbon nanotube is a tubular nanostructure, the superconducting carbon black is spherical nanoparticles, and the conductive characteristics of the carbon nanotubes are determined by the different microstructure morphologies of the carbon nanotubes; the three nano-carbon structure materials are organically combined, so that a two-dimensional structure surface of graphene, a one-dimensional structure line of a carbon nano-tube and a zero-dimensional structure point of conductive carbon black are fully exerted, and a conductive network is simultaneously constructed on different scales of the active substances of the lithium ion battery electrode, so that the performance of the battery can be exerted;
good complementary effect exists among the three conductive agents, and a long-range network, a middle-range network and a short-range network can be simultaneously established in the electrode. The carbon nano tube is a long-range conductive agent, and can connect secondary particles with secondary particles on the premise of using a small amount. The graphene conductive agent is a medium-range conductive agent because a good conductive network is constructed by overlapping of sheet layers, so that the conductivity of the whole electrode is greatly improved, but the graphene conductive agent is only aimed at a certain distance. If specific to each active material particle, it is clear that neither carbon nanotubes nor graphene sheets can completely cover the entire particle surface, so other carbon materials with lower dimensions need to be used to solve the problem of "short-range" conduction on the particle surface. The carbon black conductive agent is a zero-dimensional carbon nano material, can be uniformly attached to the surface of the active substance, and improves the electron transport on the surface of active substance particles. Therefore, the three conductive agents are organically combined, and the conductive network in the electrode can be well constructed.
Preferably, the reactive functional monomer is selected from the group consisting of methacrylamide; the adhesive comprises epoxy resin, methacryloxy silicon, waterproof rubber powder and water-soluble nano silica sol;
preferably, the conductivity measurement method of the electrode piece comprises the following steps:
s1, randomly drawing 4-6 electrode slices to be detected, cutting the electrode slices into a primary sample with the length of 50-55mm, flattening and compacting the primary sample by a flattening mechanism to obtain a flattened primary sample;
s2, polishing the flattened primary sample in the S1 to remove an oxide film on the surface of the primary sample; the abrasive paper with the abrasive paper granularity of 200 meshes is subjected to rough grinding, and then the abrasive paper with 500 meshes, 1000 meshes, 5000 meshes and 10000 meshes is sequentially used for grinding, so that the surface of the primary sample is smooth and has no obvious scratch, and an oxide layer on the surface of the primary sample is completely removed;
s3, placing the ground primary sample in the S2 on a conveyor belt, and then sampling by a sampling device to obtain a 40 x 40mm square sample; then, polishing the two ends of the sample again until the fineness is not less than 1.6 mu m so as to enable the sample to become a clean contact part;
s4, measuring the length and the thickness of the sample, and then electrically connecting a measuring lead of the resistance tester with the contact part of the sample to measure the conductivity of the sample;
the sampling device in the S3 comprises an outer cylinder with an opening at the lower end, the outer cylinder horizontally moves through a moving device, and the moving device is connected with a power supply through a controller; a sliding plate is connected in the outer barrel in a sliding manner, and a square cutter is fixedly connected to the bottom of the sliding plate; a spring is arranged between the top of the sliding plate and the outer cylinder, and a handle is arranged at the top of the outer cylinder; the bottom of the outer cylinder is provided with a gasket, and the section of the gasket is in a horn shape and inclines towards the direction far away from the axis of the outer cylinder; a pair of grooves are formed in the gasket, and conductive rollers are rotationally connected in the grooves; a support is fixedly connected in the groove at one side of the roller, a metal elastic sheet is fixedly connected at one side of the support close to the roller, and the elastic sheet is contacted with the side surface of the roller; the two elastic sheets are connected with a controller through a lead; after the two rollers are in contact with the sample, a signal is sent to the controller, the controller controls the outer barrel to stop moving, the completeness of sample cutting is improved, and the accuracy of electrode conductivity measurement is improved; when the device is used, the outer cylinder is driven to move on the conveying belt through the moving device, the outer cylinder is moved above a primary sample on the conveying belt, after the two rollers are completely contacted with the primary sample, the two elastic sheets are electrically connected through the elastic sheets matched with the rollers and the primary sample, the moving device is controlled to stop working through the controller, the cutter is further ensured to completely move to the middle position of the primary sample, the integrity of an electrode pole piece sample cut by the cutter is ensured, and the measurement accuracy of the electrode conductivity is further improved; when the outer cylinder moves to a proper position right above the initial sample, the outer cylinder is pressed to be matched with the gasket to tension the initial sample, so that the flatness of the initial sample is improved, the size precision of a cut sample is further improved, and the error of subsequent length measurement is reduced; simultaneously urceolus is with the in-process that the packing ring pushed down, and the packing ring pressurized is followed outward and is slided and the tensioning primary sample, and the air in the urceolus is discharged through the clearance between packing ring and the primary sample after the compression simultaneously, and then increases the clastic clean efficiency of cinder on the primary sample surface, further guarantees the cleanliness factor of tailorring the back sample, increases the measurement precision of electrode conductivity.
Preferably, a ring cavity is formed in the position, corresponding to the rotating shaft of the roller, of the gasket, a wavy steel wire is arranged in the ring cavity, and one end of the steel wire is fixedly connected with the rotating shaft of the roller; the steel wire is driven by the roller to rotate and vibrate, so that the extension of the gasket to a sample is further reduced, and the measurement error of the conductivity of the electrode is reduced; when gyro wheel and initial form contact and rotate, the gyro wheel drives the pivot and rotates in the annular chamber, and then drives the steel wire and constantly rotates, because the steel wire is the wave, and then makes the steel wire constantly drive the packing ring vibration at the rotation in-process, and then reduces the frictional force between packing ring and the initial form, and then to the drawing of initial form when reducing the packing ring and warping, the tensile deformation of reduction initial form further reduces the thickness error between sample and the initial form, increases the measurement precision of electrode conductivity.
Preferably, the middle part of the sliding plate is sleeved with a mandrel, one end of the mandrel is fixedly connected with the top of the outer cylinder, and the other end of the mandrel is provided with a sucker; the bottom of the sucker is provided with a group of vent holes; the lifting handle is made of elastic rubber, an air blowing cavity is formed in the lifting handle, and the air blowing cavity is communicated with the sucking disc through a through hole formed in the mandrel; the impurity residue on the surface of the sample is reduced by pressing the handle to exhaust, so that the accuracy of the electrode conductivity measurement is further improved; the handle drives the outer barrel and the cutter to move downwards by pressing the handle downwards, so that the primary sample is cut to form a sample, and meanwhile, the handle is made of elastic rubber, and the handle is internally provided with the air blowing cavity, so that compressed air is generated when the air blowing cavity is extruded, the compressed air is filled into the sucker through the through hole and is finally sprayed out through the air vent, and the cleaning of the surface of the primary sample is further increased; after the cutter is accomplished tailorring to the primary sample, through pulling the handle to the lift, and then make the long-pending increase of blast air cavity form the negative pressure, cooperate the sucking disc to hug closely the sample that cuts the formation simultaneously, and then bleed to the sucking disc through the through-hole, and then drive the sucking disc and hold the sample, make things convenient for the quick transfer of sample to measure and weigh, less sample shifts deformation and secondary pollution among the measurement process, further increases the measurement precision of electrode conductivity.
Preferably, a sliding column is arranged in the through hole, and the diameter of the sliding column is smaller than one half of the diameter of the through hole; the top of the sliding column is fixedly connected with the top of the air blowing cavity, a group of bristles are uniformly distributed on the periphery of the sliding column, the bristles are driven by the handle to clean the through holes, the blockage of the through holes is further reduced, and the transfer efficiency of the sample is increased; when pressing and carrying the handle, constantly drive the traveller through the handle and slide from top to bottom, and then drive the brush hair through the traveller and clear up the through-hole inner wall, reduce the surperficial dust of sample and the jam of cinder piece to the through-hole, and then guarantee the sucking disc and normally work, further increase the measurement precision of electrode conductivity.
The invention has the following beneficial effects:
1. according to the formula for improving the conductivity of the electrode, the material morphology of graphene is a sheet-shaped nano structure, the carbon nano tube is a tubular nano structure, the superconducting carbon black is spherical nano particles, and the different microstructure morphologies of the several nano carbon materials determine the conductivity of the nano carbon materials; the three nano-carbon structure materials are organically combined, so that a two-dimensional structure surface of graphene, a one-dimensional structure line of a carbon nano-tube and a zero-dimensional structure point of conductive carbon black are fully exerted, and a conductive network is simultaneously constructed on different scales of the active substance of the lithium ion battery electrode, thereby being beneficial to exerting various performances of the battery.
2. According to the formula for improving the conductivity of the electrode, the handle is pressed downwards, so that compressed air is generated when the air blowing cavity is extruded, the compressed air is filled into the sucker through the through hole and is finally sprayed out through the air hole, and the cleaning of the surface of a prototype is further increased; afterwards, the handle is pulled through lifting upwards, so that the blowing cavity is increased to form negative pressure, the sucking discs are matched to be attached to samples formed by cutting, the sucking discs are pumped through the through holes, the samples are driven to be sucked by the sucking discs, the samples are convenient to transfer, measure and weigh quickly, deformation and secondary pollution in the measuring process are reduced in sample transfer, and the measuring accuracy of the electrode conductivity is further improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of a sampling device according to the present invention;
FIG. 3 is a cross-sectional view of a sampling device according to the present invention;
FIG. 4 is a top view of a sampling device according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 2 at A;
FIG. 6 is an enlarged view of a portion of FIG. 3 at B;
FIG. 7 is an enlarged view of a portion of FIG. 4 at C;
in the figure: the outer barrel 1, the sliding plate 11, the cutter 12, the handle 13, the gasket 14, the groove 15, the roller 16, the support 17, the elastic sheet 18, the annular cavity 2, the steel wire 21, the rotating shaft 22, the core shaft 23, the suction cup 24, the vent hole 25, the air blowing cavity 26, the through hole 27, the sliding column 28 and the bristles 29.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
The formula for improving the conductivity of the electrode comprises the following components in parts by weight: 20% of active functional monomer, 2.5% of acrylic acid, 8% of binder, 5% of graphene, 1% of carbon nanotube, 2% of conductive carbon black, 50% of dissolving agent and 10% of carrier; and manufacturing the electrode plate according to corresponding components.
Example 2
The formula for improving the conductivity of the electrode comprises the following components in parts by weight: 20% of active functional monomer, 2.5% of acrylic acid, 8% of binder, 5% of graphene, 1.5% of carbon nanotubes, 2.5% of conductive carbon black, 50% of dissolving agent and 10% of carrier; and manufacturing the electrode plate according to corresponding components.
Example 3
The formula for improving the conductivity of the electrode comprises the following components in parts by weight: 20% of active functional monomer, 2.5% of acrylic acid, 8% of binder, 5% of graphene, 2% of carbon nanotube, 1% of conductive carbon black, 50% of dissolving agent and 10% of carrier; and manufacturing the electrode plate according to corresponding components.
Example 4
The formula for improving the conductivity of the electrode comprises the following components in parts by weight: 20% of active functional monomer, 2.5% of acrylic acid, 8% of binder, 5% of graphene, 2.5% of carbon nanotubes, 0.5% of conductive carbon black, 50% of dissolving agent and 10% of carrier; and manufacturing the electrode plate according to corresponding components.
By changing the addition amounts of the carbon nanotube CNT and the conductive carbon black SP, the internal resistance of the finally prepared battery plate was detected and compared with the discharge platforms at different discharge rates, and the results are shown in table 1:
table 1 influence of the addition amounts of graphene, CNT and SP on the internal resistance of positive plate and the voltage of different discharge rate platforms of battery
| 1%CNT+2%SP | 1.5%CNT+2.5 |
2%CNT+1%SP | 2.5%CNT+0.5%SP | |
| Internal resistance of pole piece | 161Ohm | 134Ohm | 143Ohm | 152Ohm |
| 1C | 3101 mV | 3135 mV | 3128mV | 3120 mV |
| 5C | 2897mV | 2925 mV | 2917 mV | 2908 mV |
| 10C | 2817mV | 2841 mV | 2833 mV | 2825 mV |
| 15C | 2736mV | 2765 mV | 2754 mV | 2747 mV |
| 20C | 2645mV | 2673 mV | 2666 mV | 2655 mV |
As can be seen from table 1, the combined conductivity of CNTs, SPs and graphene with different addition contents is different, and when the addition amount of the carbon nanotube is 1.5% and the addition amount of the superconducting carbon black is 2.5%, the internal resistance of the pole piece is the lowest. The battery is discharged with different multiplying powers, no matter the battery is discharged with low current or discharged with high current, the test result is consistent with the conclusion of the feedback of the internal resistance of the test pole piece.
As shown in fig. 1 to 7, the reactive functional monomer of the present invention is selected from methacrylamide; the adhesive comprises epoxy resin, methacryloxy silicon, waterproof rubber powder and water-soluble nano silica sol.
As an embodiment of the present invention, the method for measuring the conductivity of the electrode sheet includes the following steps:
s1, randomly drawing 4-6 electrode slices to be detected, cutting the electrode slices into a primary sample with the length of 50-55mm, flattening and compacting the primary sample by a flattening mechanism to obtain a flattened primary sample;
s2, polishing the flattened primary sample in the S1 to remove an oxide film on the surface of the primary sample; the abrasive paper with the abrasive paper granularity of 200 meshes is subjected to rough grinding, and then the abrasive paper with 500 meshes, 1000 meshes, 5000 meshes and 10000 meshes is sequentially used for grinding, so that the surface of the primary sample is smooth and has no obvious scratch, and an oxide layer on the surface of the primary sample is completely removed;
s3, placing the ground primary sample in the S2 on a conveyor belt, and then sampling by a sampling device to obtain a 40 x 40mm square sample; then, polishing the two ends of the sample again until the fineness is not less than 1.6 mu m so as to enable the sample to become a clean contact part;
s4, measuring the length and the thickness of the sample, and then electrically connecting a measuring lead of the resistance tester with the contact part of the sample to measure the conductivity of the sample;
the sampling device in the S3 comprises an outer cylinder 1 with an opening at the lower end, wherein the outer cylinder 1 horizontally moves through a moving device, and the moving device is connected with a power supply through a controller; a sliding plate 11 is connected in the outer barrel 1 in a sliding manner, and a square cutter 12 is fixedly connected to the bottom of the sliding plate 11; a spring is arranged between the top of the sliding plate 11 and the outer cylinder 1, and a handle 13 is arranged at the top of the outer cylinder 1; the bottom of the outer cylinder 1 is provided with a gasket 14, and the section of the gasket 14 is in a shape of a horn and inclines towards the direction far away from the axis of the outer cylinder 1; a pair of grooves 15 are formed in the gasket 14, and conductive rollers 16 are rotatably connected in the grooves 15; a support 17 is fixedly connected in the groove 15 at one side of the roller 16, a metal elastic sheet 18 is fixedly connected at one side of the support 17 close to the roller 16, and the elastic sheet 18 is contacted with the side surface of the roller 16; the two elastic sheets 18 are connected with a controller through a lead; after the two rollers 16 are in contact with the sample, a signal is sent to the controller, the controller controls the outer cylinder 1 to stop moving, the completeness of sample cutting is improved, and the accuracy of electrode conductivity measurement is improved; when the device is used, the outer cylinder 1 is driven to move on the conveying belt through the moving device, the outer cylinder 1 is moved above a primary sample on the conveying belt, after the two rollers 16 are completely contacted with the primary sample, the two elastic sheets 18 are matched with the rollers 16 and the primary sample through the elastic sheets 18, so that the two elastic sheets 18 are electrically connected, the moving device is controlled to stop working through the controller, the cutter 12 is ensured to completely move to the middle position of the primary sample, the integrity of an electrode pole piece sample cut by the cutter 12 is ensured, and the measurement accuracy of the conductivity of the electrode is improved; when the outer cylinder 1 moves to a proper position right above the initial sample, the outer cylinder 1 is pressed to be matched with the gasket 14 to tension the initial sample, so that the flatness of the initial sample is improved, the dimensional precision of a cut sample is further improved, and the error of subsequent length measurement is reduced; simultaneously urceolus 1 is with the in-process that packing ring 14 pushed down, and packing ring 14 is pressed the back and outwards slides and the tensioning primary sample, and the air in urceolus 1 is discharged through the clearance between packing ring 14 and the primary sample after the compression simultaneously, and then increases the clastic clean efficiency of cinder on the surface of primary sample, further guarantees the cleanliness factor of tailorring the back sample, increases the measurement precision of electrode conductivity.
As an embodiment of the present invention, an annular cavity 2 is disposed at a position corresponding to a rotating shaft 22 of the roller 16 on the gasket 14, a wavy steel wire 21 is disposed in the annular cavity 2, and one end of the steel wire 21 is fixedly connected to the rotating shaft 22 of the roller 16; the steel wire 21 is driven by the roller 16 to rotate and vibrate, so that the extension of the gasket 14 to a sample is further reduced, and the measurement error of the electrode conductivity is reduced; when gyro wheel 16 contacts and rotates with the primary sample, gyro wheel 16 drives pivot 22 and rotates in annular chamber 2, and then drive steel wire 21 constantly rotatory, because steel wire 21 is the wave, and then make steel wire 21 constantly drive packing ring 14 vibration at the rotation in-process, and then reduce the frictional force between packing ring 14 and the primary sample, and then to the drawing of primary sample when reducing packing ring 14 and warping, reduce the tensile deformation of primary sample, further reduce the thickness error between sample and the primary sample, increase the measurement precision of electrode conductivity.
As an embodiment of the invention, a mandrel 23 is sleeved in the middle of the sliding plate 11, one end of the mandrel 23 is fixedly connected with the top of the outer cylinder 1, and the other end of the mandrel 23 is provided with a suction cup 24; the bottom of the sucking disc 24 is provided with a group of vent holes 25; the handle 13 is made of elastic rubber, a blowing cavity 26 is formed in the handle 13, and the blowing cavity 26 is communicated with the suction cup 24 through a through hole 27 formed in the mandrel 23; the impurity residue on the surface of the sample is reduced by pressing the handle 13 to exhaust, so that the accuracy of the electrode conductivity measurement is further improved; the lifting handle 13 is pressed downwards, so that the lifting handle 13 drives the outer barrel 1 and the cutter 12 to move downwards, the primary sample is cut to form a sample, meanwhile, the lifting handle 13 is made of elastic rubber, and the lifting handle 13 is internally provided with the air blowing cavity 26, so that compressed air is generated when the air blowing cavity 26 is extruded, the compressed air is filled into the suction disc 24 through the through hole 27 and is finally sprayed out through the air vent 25, and the cleaning of the surface of the primary sample is further increased; after cutter 12 accomplished cutting out to the primary sample, through upwards carrying pull handle 13, and then make 26 volume increases in blast chamber form negative pressure, cooperate sucking disc 24 to hug closely simultaneously and cut the sample that forms, and then bleed to sucking disc 24 through-hole 27, and then drive sucking disc 24 and hold the sample, make things convenient for the quick transfer of sample to measure and weigh, less sample shifts deformation and secondary pollution among the measurement process, further increases the measurement precision of electrode conductivity.
As an embodiment of the present invention, a sliding column 28 is disposed in the through hole 27, and the diameter of the sliding column 28 is less than one half of the diameter of the through hole 27; the top of the sliding column 28 is fixedly connected with the top of the air blowing cavity 26, a group of bristles 29 are uniformly distributed on the periphery of the sliding column 28, the bristles 29 are driven by the handle 13 to clean the through hole 27, the blockage of the through hole 27 is further reduced, and the transfer efficiency of the sample is increased; when pressing and carrying handle 13, constantly drive traveller 28 through handle 13 and slide from top to bottom, and then drive brush hair 29 through traveller 28 and clear up through-hole 27 inner wall, reduce the surperficial dust of sample and the jam of cinder piece to through-hole 27, and then guarantee sucking disc 24 normal work, further increase the measurement precision of electrode conductivity.
When the device is used, the outer cylinder 1 is driven to move on the conveying belt through the moving device, the outer cylinder 1 is moved above a primary sample on the conveying belt, after the two rollers 16 are completely contacted with the primary sample, the two elastic sheets 18 are matched with the rollers 16 and the primary sample through the elastic sheets 18, so that the two elastic sheets 18 are electrically connected, the moving device is controlled to stop working through the controller, the cutter 12 is ensured to completely move to the middle position of the primary sample, the integrity of an electrode pole piece sample cut by the cutter 12 is ensured, and the measurement accuracy of the conductivity of the electrode is improved; when the outer cylinder 1 moves to a proper position right above the initial sample, the outer cylinder 1 is pressed to be matched with the gasket 14 to tension the initial sample, so that the flatness of the initial sample is improved, the dimensional precision of a cut sample is further improved, and the error of subsequent length measurement is reduced; meanwhile, in the process that the outer cylinder 1 and the gasket 14 are pressed downwards, the gasket 14 slides outwards after being pressed and tensions a primary sample, and air in the outer cylinder 1 is discharged through a gap between the gasket 14 and the primary sample after being compressed, so that the cleaning efficiency of residual oxide scale scraps on the surface of the primary sample is increased, the cleanliness of a cut sample is further ensured, and the measurement accuracy of the conductivity of the electrode is improved; the lifting handle 13 is pressed downwards, so that the lifting handle 13 drives the outer barrel 1 and the cutter 12 to move downwards, the primary sample is cut to form a sample, meanwhile, the lifting handle 13 is made of elastic rubber, and the lifting handle 13 is internally provided with the air blowing cavity 26, so that compressed air is generated when the air blowing cavity 26 is extruded, the compressed air is filled into the suction disc 24 through the through hole 27 and is finally sprayed out through the air vent 25, and the cleaning of the surface of the primary sample is further increased; after the cutter 12 finishes cutting the initial sample, the handle 13 is lifted upwards, so that the volume of the air blowing cavity 26 is increased to form negative pressure, the suction cup 24 is matched to be tightly attached to the cut sample, the suction cup 24 is pumped through the through hole 27, the suction cup 24 is driven to suck the sample, the sample is conveniently and quickly transferred, measured and weighed, the deformation and secondary pollution in the sample transfer and measurement process are reduced, and the measurement accuracy of the electrode conductivity is further improved; when pressing and carrying handle 13, constantly drive traveller 28 through handle 13 and slide from top to bottom, and then drive brush hair 29 through traveller 28 and clear up through-hole 27 inner wall, reduce the surperficial dust of sample and the jam of cinder piece to through-hole 27, and then guarantee sucking disc 24 normal work, further increase the measurement precision of electrode conductivity.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The formula for improving the conductivity of the electrode is characterized in that: the composition comprises the following components in parts by weight:
15-20% of active functional monomer;
1-2.5% of acrylic acid;
5-10% of a binder;
3-5% of graphene;
1-2.5% of carbon nanotubes;
0.5 to 2 percent of conductive carbon black;
45-60% of a dissolving agent;
10-15% of a carrier;
the electrode plate is made of the component substances.
2. The formulation for enhancing the conductivity of an electrode according to claim 1, wherein: the active functional monomer is selected from methacrylamide; the adhesive comprises epoxy resin, methacryloxy silicon, waterproof rubber powder and water-soluble nano silica sol.
3. The formulation for enhancing the conductivity of an electrode according to claim 2, wherein: the conductivity measurement method of the electrode pole piece comprises the following steps:
s1, randomly drawing 4-6 electrode slices to be detected, cutting the electrode slices into a primary sample with the length of 50-55mm, flattening and compacting the primary sample by a flattening mechanism to obtain a flattened primary sample;
s2, polishing the flattened primary sample in the S1 to remove an oxide film on the surface of the primary sample; the abrasive paper with the abrasive paper granularity of 200 meshes is subjected to rough grinding, and then the abrasive paper with 500 meshes, 1000 meshes, 5000 meshes and 10000 meshes is sequentially used for grinding, so that the surface of the primary sample is smooth and has no obvious scratch, and an oxide layer on the surface of the primary sample is completely removed;
s3, placing the ground primary sample in the S2 on a conveyor belt, and then sampling by a sampling device to obtain a 40 x 40mm square sample; then, polishing the two ends of the sample again until the fineness is not less than 1.6 mu m so as to enable the sample to become a clean contact part;
s4, measuring the length and the thickness of the sample, and then electrically connecting a measuring lead of the resistance tester with the contact part of the sample to measure the conductivity of the sample;
the sampling device in the S3 comprises an outer cylinder (1) with an opening at the lower end, wherein the outer cylinder (1) horizontally moves through a moving device, and the moving device is connected with a power supply through a controller; a sliding plate (11) is connected in the outer barrel (1) in a sliding manner, and a square cutter (12) is fixedly connected to the bottom of the sliding plate (11); a spring is arranged between the top of the sliding plate (11) and the outer cylinder (1), and a handle (13) is arranged at the top of the outer cylinder (1); the bottom of the outer cylinder (1) is provided with a gasket (14), and the section of the gasket (14) is in a shape of a horn and inclines towards the direction far away from the axis of the outer cylinder (1); a pair of grooves (15) is formed in the gasket (14), and conductive rollers (16) are rotatably connected in the grooves (15); a support (17) is fixedly connected in the groove (15) on one side of the roller (16), a metal elastic sheet (18) is fixedly connected on one side, close to the roller (16), of the support (17), and the elastic sheet (18) is in contact with the side face of the roller (16); the two elastic sheets (18) are connected with a controller through a lead; after the two rollers (16) are in contact with the sample, a signal is sent to the controller, the outer barrel (1) is controlled by the controller to stop moving, the integrity of sample cutting is improved, and the accuracy of electrode conductivity measurement is improved.
4. The formulation for enhancing the conductivity of an electrode according to claim 3, wherein: an annular cavity (2) is formed in the position, corresponding to the rotating shaft (22) of the roller (16), of the gasket (14), wavy steel wires (21) are arranged in the annular cavity (2), and one end of each steel wire (21) is fixedly connected with the rotating shaft (22) of the roller (16); the roller (16) drives the steel wire (21) to rotate and vibrate, so that the extension of the gasket (14) to a sample is further reduced, and the measurement error of the electrode conductivity is reduced.
5. The formulation for increasing the conductivity of an electrode according to claim 4, wherein: a mandrel (23) is sleeved in the middle of the sliding plate (11), one end of the mandrel (23) is fixedly connected with the top of the outer cylinder (1), and a sucking disc (24) is arranged at the other end of the mandrel; the bottom of the sucking disc (24) is provided with a group of vent holes (25); the lifting handle (13) is made of elastic rubber, a blowing cavity (26) is formed in the lifting handle (13), and the blowing cavity (26) is communicated with the sucking disc (24) through a through hole (27) formed in the mandrel (23); and the impurity residue on the surface of the sample is reduced by pressing the handle (13) to exhaust, so that the accuracy of the conductivity measurement of the electrode is further improved.
6. The formulation for increasing the conductivity of an electrode according to claim 5, wherein: a sliding column (28) is arranged in the through hole (27), and the diameter of the sliding column (28) is smaller than one half of the diameter of the through hole (27); the top of the sliding column (28) is fixedly connected with the top of the air blowing cavity (26), a group of bristles (29) are uniformly distributed on the periphery of the sliding column (28), the through holes (27) are cleaned by driving the bristles (29) through the handles (13), the blockage of the through holes (27) is further reduced, and the transfer efficiency of a sample is increased.
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| CN202010440915.XA CN111777726A (en) | 2020-05-22 | 2020-05-22 | Formula for improving electrode conductivity |
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| CN202010440915.XA CN111777726A (en) | 2020-05-22 | 2020-05-22 | Formula for improving electrode conductivity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704488A (en) * | 2020-12-11 | 2021-04-27 | 西安交通大学 | Wound damage state monitoring devices based on flexible ventilative hydrogel membrane |
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2020
- 2020-05-22 CN CN202010440915.XA patent/CN111777726A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704488A (en) * | 2020-12-11 | 2021-04-27 | 西安交通大学 | Wound damage state monitoring devices based on flexible ventilative hydrogel membrane |
| CN112704488B (en) * | 2020-12-11 | 2022-06-07 | 西安交通大学 | Wound damage state monitoring devices based on flexible ventilative hydrogel membrane |
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