CN105869913A - Super capacitor and preparation method thereof - Google Patents
Super capacitor and preparation method thereof Download PDFInfo
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- CN105869913A CN105869913A CN201610211110.1A CN201610211110A CN105869913A CN 105869913 A CN105869913 A CN 105869913A CN 201610211110 A CN201610211110 A CN 201610211110A CN 105869913 A CN105869913 A CN 105869913A
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- electrolyte
- carbon
- ultracapacitor
- collector
- composite construction
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- 239000003990 capacitor Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 68
- 239000003792 electrolyte Substances 0.000 claims abstract description 40
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000007772 electrode material Substances 0.000 claims abstract description 28
- 239000002086 nanomaterial Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000005486 organic electrolyte Substances 0.000 claims abstract description 3
- 238000010276 construction Methods 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 27
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000005253 cladding Methods 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052709 silver Inorganic materials 0.000 claims description 10
- 239000004332 silver Substances 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000007872 degassing Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 241000446313 Lamella Species 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 239000002608 ionic liquid Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IBZJNLWLRUHZIX-UHFFFAOYSA-N 1-ethyl-3-methyl-2h-imidazole Chemical compound CCN1CN(C)C=C1 IBZJNLWLRUHZIX-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- PWVDAYXZBXAOSA-UHFFFAOYSA-N 2-butyl-1-methylpyrrolidine Chemical compound CCCCC1CCCN1C PWVDAYXZBXAOSA-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- -1 tetraethyl ammonium tetrafluoroborate Chemical compound 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/66—Current collectors
- H01G11/68—Current collectors characterised by their material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Nanotechnology (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Composite Materials (AREA)
Abstract
The invention provides a super capacitor and a preparation method thereof. An electrode material for the super capacitor is a carbon nanoelectrode material; a current collector is carbon-coated porous metal; and the mass fraction of a carbon nano-material in the super capacitor is 20%-35%. The invention further discloses the preparation method. The preparation method comprises the following steps: dispersing the carbon nanoelectrode material into an electrolyte to form slurry; extruding the slurry into the porous current collector in a vacuum supply condition or a pressurized condition to form a composite structure of an electrode and the current collector; and finally welding the current collector and a metal tab, partitioning the composite structure of the electrode and the current collector by a diaphragm and carrying out packaging and molding. The super capacitor product obtained by the method has the advantages of being high in effective ingredient content, high in volume energy density and suitable for an aqueous electrolyte, an organic electrolyte and an ionic liquid electrolyte, and can be operated at 1-5V.
Description
Technical field
The invention belongs to ultracapacitor preparing technical field, be specifically related to a kind of carbon nano-electrode and receive with carbon
Ultracapacitor of rice collector and preparation method thereof.
Background technology
It is fast that double electric layers supercapacitor has charging, and the life-span is long, and the advantage that power density is big, at heavy machine
Car, the startup of big machinery and brake recover energy aspect, have irreplaceable effect.Recent sends out
Exhibition trend is to use carbon nanomaterial to do electrode material, substitutes active carbon electrode material, and higher
Voltage (3V) under operate, in order to obtain higher energy density, expand ultracapacitor application neck
Territory.
The most traditional capacitor arrangement is that electrode material is attached on metal plate collector, pole of then burn-oning
Ear, and be separated by with barrier film, inject electrolyte, form capacitor system.Carbon nanomaterial is light due to density,
Liquid absorption is big, processing difficulties.Active force simultaneously and between plate type metal collector is weak, needs to use and glues
Mixture, result in voltage window and declines, and internal resistance raises.So, there is the report utilizing porous metals collector
Road, after electrode material is refined, slurrying in the electrolytic solution, inject in porous metals collector, serve
The effect of fixed electrode material, also avoids using binding agent, improves the mass fraction of electrode material.So
And, it is big that metal collector has weight, the shortcoming that mechanical strength increases with porosity and declines rapidly, leads
Cause Continuous maching difficult and with high costs.Also have and carbon nanomaterial is directly prepared into pad, electrify simultaneously
Pole material and the effect of collector.But, the hole of such collector is the biggest, and liquid absorption is big, body
Long-pending energy is the highest, and expansive shortcoming, and the carbon nanomaterial filming performance of the most many big specific areas is not
Good, limit it and use.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, it is an object of the invention to provide a kind of super electricity
Container and preparation method thereof, the foam-metal current collector body of carbon cladding, injects carbon nano-electrode wherein, shape
Become composite construction, to improve carbon nanomaterial mass fraction in ultracapacitor, and improve electric capacity
The volume energy density of device.
For reaching object above, the present invention adopts the following technical scheme that
A kind of ultracapacitor, the electrode material of described ultracapacitor is carbon nanomaterial, and collector is
The foam metal of carbon cladding, carbon nanomaterial mass fraction in ultracapacitor is 20-35%.
Described carbon nanomaterial, including CNT and Graphene, or the two is with arbitrary proportion mixing system
Become；Wherein a diameter of 0.6-200nm of CNT, draw ratio are 1-1000；The wherein thickness of Graphene
For 0.35-5nm, lamella area is 0.001-25 μm2。
In the foam metal of described carbon cladding, the mass fraction of carbon is 0.1-5%, and structure is Sp2Hydridization；Collection
The voidage of fluid is 70-96%, and thickness is 50-500 μm.
In described foam metal, metal is aluminum, copper, nickel, silver or platinum.
The method of ultracapacitor described above, comprises the steps:
Step 1: described carbon nanomaterial is joined in electrolyte, 20-60 DEG C, under 1-3kW super
Sound 1-30 minute, forms the slurry that viscosity is 15000-500000 centipoise；
Step 2: by the extruding of above-mentioned slurry or the mode of evacuation so that it is enter in the hole of collector,
Form the composite construction of electrode material and collector；
Step 3: by roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes composite construction
Thickness is 20-400 μm；
Step 4: step 3 gained composite construction is fixed with metal tabs conductive silver glue, and welds；Again
Separating with barrier film, multi-disc assembles, and is then packaged molding, only stays a liquid injection port, obtains molding electric capacity
Device；
Step 5: by above-mentioned shaping capacitor through dehydration, degassing and Aging Step, add electrolyte, make
In capacitor, all material with carbon elements with the mass ratio of electrolyte are: 1:1.2～1:3.
Step 6: liquid injection port closed, forms capacitor product, and wherein the mass fraction of carbon nanomaterial is
20-35%.
Described in step 2, the pressure of extruding is 0.2-1MPa；The vacuum of described evacuation is 10-1-10-2Pa。
The material of metal tabs described in step 4 is aluminum, silver, copper or ferrum.
Electrolyte described in step 1 is aqueous electrolyte, organic electrolyte or il electrolyte, it is possible to
1-5V operates.
Compared to the prior art the present invention, has the advantage that
1) used by, the foam-metal current collector body of carbon cladding, compares than simple metal collector, mechanical strength
Height, is not afraid of extruding, can be beneficial to improve the degree of compaction of electrode material at high rolling pressure compacted under,
Reduce internal resistance, reduce cost.
2) itself electric capacity is also contributed to due to the carbon in collector, so its porosity ranges can be than porous gold
Belonging to the wide a lot of of collector, the granularity requirements for carbon nano-electrode material broadens, and improves electrode material
Available types, advantageously reduce processing cost, improve volume energy density.
3) carbon nano electrode material is filled in the foam-metal current collector body of carbon cladding, forms composite construction, both
Carbon nanomaterial swellability in the electrolytic solution can be reduced, there is again good interface compatibility and connect with little
Get an electric shock and hinder.
4) compared with the course of processing using flat metal collector, owing to there is no binding agent, this capacitor
The use cycle longer, advantageously in play electrode material performance.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
With a diameter of 0.6nm, draw ratio be the CNT of 1000 as electrode material, at aqueous electrolyte
In (such as the KOH solution of 6mol/L), at 20 DEG C, under 1kW ultrasonic 30 minutes, forming viscosity is
The slurry of 15000 centipoises.By above-mentioned slurry evacuation (10-1Pa) mode so that it is enter carbon cladding
Foam silver collector (mass fraction of carbon is 0.1%, and structure is Sp2Hydridization.The voidage of collector
Being 96%, thickness is 500 μm) hole in, form the composite construction of electrode material and collector.Logical
Crossing roll-in, extruded by the partial electrolyte liquid in above-mentioned composite construction, the thickness making composite construction is 400 μm.
Above-mentioned composite construction is welded with aluminium pole ears.Separating with barrier film, multi-disc assembles, encapsulated moulding again,
Only stay a liquid injection port.By above-mentioned shaping capacitor through degassing and the conventional procedures such as aging, add electrolyte,
The mass ratio of all material with carbon elements and electrolyte in capacitor is made to be: 1:1.2.Liquid injection port is closed, forms electricity
Container products, wherein the mass fraction of carbon nanomaterial is 35%.Can operate under 1V, receive based on carbon
The electric capacity of rice material is 250F/g.
Embodiment 2
With thickness as 0.35nm, lamella area is 0.001 μm2Graphene be electrode material, in organic liquor
In electrolyte (acetonitrile solution of tetraethyl ammonium tetrafluoroborate), at 50 DEG C, under 1kW ultrasonic 10 points
Clock, forms the slurry that viscosity is 20000 centipoises.By above-mentioned slurry evacuation (10-1Pa) mode,
Make it into carbon cladding nickel foam collector (mass fraction of carbon is 5%, and structure is Sp2 hydridization.Collection
The voidage of fluid is 70%, and thickness is 300 μm) hole in, form electrode material and collector
Composite construction.By roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes composite construction
Thickness is 250 μm.By above-mentioned composite construction and silver tab welding.Separating with barrier film, multi-disc assembles again,
Encapsulated moulding, only stays a liquid injection port.Above-mentioned shaping capacitor is waited tradition through dehydration, degassing with aging
Step, adds electrolyte, makes the mass ratio of all material with carbon elements and electrolyte in capacitor be: 1:2.2.Will
Liquid injection port is closed, and forms capacitor product, and wherein the mass fraction of carbon nanomaterial is 27.5%.Can be
Operating under 3V, electric capacity based on carbon nanomaterial is 150F/g.
Embodiment 3
With thickness as 2nm, lamella area is 25 μm2Graphene and a diameter of 200nm, draw ratio be 1
The mixture of CNT be electrode material, the mass ratio of the two is that 1:1. is at il electrolyte (1-
Ethyl-3-methylimidazole bis-trifluoromethylsulfoandimide salt) in, at 60 DEG C, under 0.8kW ultrasonic 20 minutes,
Form the slurry that viscosity is 340000 centipoises.By the mode of the mode (1MPa) that above-mentioned slurry extrudes,
Make it into carbon cladding foam copper current collector (mass fraction of carbon is 1.5%, and structure is Sp2 hydridization.
The voidage of collector is 90%, and thickness is 300 μm) hole in, form electrode material and collector
Composite construction.By roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes composite construction
Thickness be 220 μm.Above-mentioned composite construction is welded with copper polar ear.Separating with barrier film, multi-disc assembles again,
Encapsulated moulding, only stays a liquid injection port.Above-mentioned shaping capacitor is waited tradition through dehydration, degassing with aging
Step, adds electrolyte, makes the mass ratio of all material with carbon elements and electrolyte in capacitor be: 1:3.Will note
Liquid mouth is closed, and forms capacitor product, and wherein the mass fraction of carbon nanomaterial is 20%.Can be at 4V
Lower operation, electric capacity based on carbon nanomaterial is 105F/g.
Embodiment 4
With thickness as 0.7nm, lamella area is 1 μm2Graphene and a diameter of 1nm, draw ratio be 30
The mixture of CNT be electrode material, the mass ratio of the two is that 1:1. is in il electrolyte
In (N-methyl butyl pyrrolidine bis-trifluoromethylsulfoandimide salt), at 60 DEG C, under 1kW ultrasonic 1 minute,
Form the slurry that viscosity is 100000 centipoises.By the mode of the mode (0.2MPa) that above-mentioned slurry extrudes,
Make it into carbon cladding foam platinum collector (mass fraction of carbon is 3%, and structure is Sp2 hydridization.Collection
The voidage of fluid is 70%, and thickness is 50 μm) hole in, form answering of electrode material and collector
Close structure.By roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes the thickness of composite construction
Degree is 40 μm.Above-mentioned composite construction is welded with aluminium pole ears.Separating with barrier film, multi-disc assembles again, encapsulation
Molding, only stays a liquid injection port.By above-mentioned shaping capacitor through dehydration, degassing and the conventional procedures such as aging,
Add electrolyte, make the mass ratio of all material with carbon elements and electrolyte in capacitor be: 1:2.5.By liquid injection port
Closing, form capacitor product, wherein the mass fraction of carbon nanomaterial is 24%.Can grasp under 5V
Making, electric capacity based on carbon nanomaterial is 200F/g.
Embodiment 5
With a diameter of 1.2nm, draw ratio be the CNT of 600 as electrode material, be electrolysed at ionic liquid
In liquid (1-ethyl-3-methyl Tetrafluoroboric acid imidazoles), at 30 DEG C, under 2kW ultrasonic 20 minutes, formed
Viscosity is the slurry of 35000 centipoises.By the mode of the mode (1MPa) that above-mentioned slurry extrudes so that it is
(mass fraction of carbon is 2% to the Foam silver collector of entrance carbon cladding, and structure is Sp2 hydridization.Collector
Voidage be 85%, thickness is 200 μm) hole in, form the compound of electrode material and collector
Structure.By roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes the thickness of composite construction
It is 120 μm.By above-mentioned composite construction and silver tab welding.Separating with barrier film, multi-disc assembles again, encapsulation
Molding, only stays a liquid injection port.By above-mentioned shaping capacitor through dehydration, degassing and the conventional procedures such as aging,
Add electrolyte, make the mass ratio of all material with carbon elements and electrolyte in capacitor be: 1:2.Liquid injection port is sealed
Closing, form capacitor product, wherein the mass fraction of carbon nanomaterial is 28%.Can operate under 4V,
Electric capacity based on carbon nanomaterial is 200F/g.
Embodiment 6
With a diameter of 200nm, draw ratio be the CNT of 1 as electrode material, be electrolysed at ionic liquid
In liquid (two (trimethyl fluoride sulfonyl) 1-ethyl-3-methylimidazole), at 40 DEG C, under 3kW ultrasonic 30 minutes,
Form the slurry that viscosity is 500000 centipoises.By the mode of the mode (2MPa) that above-mentioned slurry extrudes,
Make it into carbon cladding foamed aluminium collector (mass fraction of carbon is 1%, and structure is Sp2 hydridization.Collection
The voidage of fluid is 96%, and thickness is 400 μm) hole in, form electrode material and collector
Composite construction.By roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes composite construction
Thickness is 280 μm.Above-mentioned composite construction is welded with aluminium pole ears.Separating with barrier film, multi-disc assembles again,
Encapsulated moulding, only stays a liquid injection port.Above-mentioned shaping capacitor is waited tradition through dehydration, degassing with aging
Step, adds electrolyte, and making the mass ratio of all material with carbon elements and electrolyte in capacitor is 1:2.By fluid injection
Mouth is closed, and forms capacitor product, and wherein the mass fraction of carbon nanomaterial is 25%.Can be at 3.5V
Lower operation, electric capacity based on carbon nanomaterial is 130F/g.
Claims (8)
1. a ultracapacitor, it is characterised in that the electrode material of described ultracapacitor is carbon nanometer
Material, collector is the foam metal of carbon cladding, carbon nanomaterial mass fraction in ultracapacitor
For 20-35%.
Ultracapacitor the most according to claim 1, it is characterised in that described carbon nanomaterial,
Including CNT and Graphene, or the two is mixed with arbitrary proportion；The wherein diameter of CNT
It is 1-1000 for 0.6-200nm, draw ratio；Wherein the thickness of Graphene is 0.35-5nm, and lamella area is
0.001-25μm2。
Ultracapacitor the most according to claim 1, it is characterised in that the foam of described carbon cladding
In metal, the mass fraction of carbon is 0.1-5%, and structure is Sp2Hydridization；The voidage of collector is 70-96%,
Thickness is 50-500 μm.
Ultracapacitor the most according to claim 3, it is characterised in that gold in described foam metal
Belong to for aluminum, copper, nickel, silver or platinum.
5. prepare the method for ultracapacitor described in any one of Claims 1-4 for one kind, it is characterised in that:
Comprise the steps:
Step 1: described carbon nanomaterial is joined in electrolyte, 20-60 DEG C, under 1-3kW super
Sound 1-30 minute, forms the slurry that viscosity is 15000-500000 centipoise；
Step 2: by the extruding of above-mentioned slurry or the mode of evacuation so that it is enter in the hole of collector,
Form the composite construction of electrode material and collector；
Step 3: by roll-in, the partial electrolyte liquid in above-mentioned composite construction is extruded, makes composite construction
Thickness is 20-400 μm；
Step 4: step 3 gained composite construction is fixed with metal tabs conductive silver glue, and welds；Again
Separating with barrier film, multi-disc assembles, and is then packaged molding, only stays a liquid injection port, obtains molding electric capacity
Device；
Step 5: by above-mentioned shaping capacitor through dehydration, degassing and Aging Step, add electrolyte, make
In capacitor, all material with carbon elements with the mass ratio of electrolyte are: 1:1.2～1:3.
Step 6: liquid injection port closed, forms capacitor product, and wherein the mass fraction of carbon nanomaterial is
20-35%.
Method the most according to claim 5, it is characterised in that: described in step 2, the pressure of extruding is
0.2-1MPa；The vacuum of described evacuation is 10-1-10-2Pa。
Method the most according to claim 5, it is characterised in that: the material of metal tabs described in step 4
Material is aluminum, silver, copper or ferrum.
Method the most according to claim 5, it is characterised in that electrolyte described in step 1 is aqueous
Electrolyte, organic electrolyte or il electrolyte, it is possible to 1-5V operates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211110.1A CN105869913B (en) | 2016-04-06 | 2016-04-06 | A kind of ultracapacitor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211110.1A CN105869913B (en) | 2016-04-06 | 2016-04-06 | A kind of ultracapacitor and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105869913A true CN105869913A (en) | 2016-08-17 |
| CN105869913B CN105869913B (en) | 2018-07-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134371A (en) * | 2017-06-19 | 2017-09-05 | 中天储能科技有限公司 | The super capacitor of recovery, preparation method can conveniently be disassembled and recovery method is disassembled |
| CN108735527A (en) * | 2018-07-10 | 2018-11-02 | 肇庆华锋电子铝箔股份有限公司 | A kind of metal foil collector for ultracapacitor |
| CN109904002A (en) * | 2019-01-14 | 2019-06-18 | 清华大学 | A kind of preparation method and bottom-resistive electrode of bottom-resistive electrode |
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| CN114999833A (en) * | 2022-06-07 | 2022-09-02 | 清华大学 | Carbon nano tube reinforced battery type capacitor and preparation method thereof |
| CN114999833B (en) * | 2022-06-07 | 2023-04-07 | 清华大学 | Carbon nano tube reinforced battery type capacitor and preparation method thereof |
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