CN104167299B - High areal density electrode of super capacitor that a kind of wire netting is strengthened and preparation method thereof - Google Patents

High areal density electrode of super capacitor that a kind of wire netting is strengthened and preparation method thereof Download PDF

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CN104167299B
CN104167299B CN201410412655.XA CN201410412655A CN104167299B CN 104167299 B CN104167299 B CN 104167299B CN 201410412655 A CN201410412655 A CN 201410412655A CN 104167299 B CN104167299 B CN 104167299B
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wire netting
slurry
super capacitor
areal density
high areal
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CN104167299A (en
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阎景旺
李然
高兆辉
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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    • 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

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Abstract

The high areal density electrode of super capacitor that a kind of wire netting is strengthened, it is characterised in that：The high areal density electrode of super capacitor that described wire netting is strengthened, one layer of active material is coated with aluminium foil, one layer of active material is coated above plus after layer of metal net.A kind of preparation method for the high areal density electrode of super capacitor that wire netting is strengthened：Active material, conductive agent, binding agent, solvent are sufficiently mixed uniformly；The slurry mixed is uniformly coated on aluminium foil surface；Before the slurry of aluminium foil surface is not completely dried, layer of metal net is covered on slurry, obtained slurry is evenly coated on wire netting, obtained electrode slice drying.Advantage of the present invention：Wire netting is both that good collector can play certain supporting role again, and the active material of wire netting levels contacts, and is effectively increased the surface density of electrode slice, at the same again will not because pole piece is blocked up and the problem of produce dry linting, chap.

Description

High areal density electrode of super capacitor that a kind of wire netting is strengthened and preparation method thereof
Technical field
The present invention relates to electrode of super capacitor technology field, the high areal density that specially a kind of wire netting is strengthened surpasses Level electrode for capacitors and preparation method thereof, the electrode slice that its feature is to prepare has higher high areal density.
Background technology
Ultracapacitor is also referred to as electrochemical capacitor or gold capacitor, because it has energy density height, cycle life Fast charging and discharging under long, high current, it is environment-friendly, operating temperature range is wide the advantages that have been to be concerned by more and more people.It is super Capacitor has the characteristics of high-specific-power and battery high-energy-density of physical capacitor concurrently, in electric automobile, solar energy equipment, no Many fields such as uninterruptible power, military affairs, Aero-Space have a wide range of applications.
The key factor for determining performance of the supercapacitor is its used electrode material, and it decides electrochemical capacitor Many main performance index.Electrode for super capacitor material mainly includes Carbon Materials, metal oxide and nitride, conduction Polymer etc..But any material is because the deciding factors such as structure have certain theoretical capacity, when material plays completely After going out its capacity, it is desirable to which the capacity for improving ultracapacitor again is only started with from the process aspect of capacitor, improves electrode slice Surface density is exactly an effective method.Surface density is the quality in unit area, the quality increase in unit area, equivalent to More active materials are added in the capacitor, and the capacity of whole capacitor can greatly improve.
The problem of pole piece is exactly made thick, double spread, brought by the method for tradition increase surface density is to increase internal resistance, And the material on electrode slice is easily chapped, come off.This patent is added using the strong method of wire netting in conventional electrode surface Last layer wire netting, is coated one layer of active material on wire netting, and the active material above and below wire netting is connected by mesh, solves Determined due to caused by pole piece is blocked up chap, dry linting the problem of.The EDGE CONTACT of wire netting and aluminium foil, wire netting are electronics again Good conductor, the internal resistance of capacitor will not be increased.Method by increasing surface density increases the capacity of ultracapacitor, has It is widely applied prospect.
The content of the invention
It is an object of the invention to improve the surface density of electrode slice, so as to increase the capacity of ultracapacitor, solve due to Internal resistance is big caused by pole piece is blocked up, and the problem of pole piece dry linting, chap, spy provides the high areal density that a kind of wire netting is strengthened and surpassed Level electrode for capacitors and preparation method thereof.
The high areal density electrode of super capacitor that a kind of wire netting is strengthened, it is characterised in that：What described wire netting was strengthened High areal density electrode of super capacitor, one layer of active material is coated with aluminium foil, one is coated above plus after layer of metal net Layer active material.
A kind of preparation method for the high areal density electrode of super capacitor that wire netting is strengthened, it is characterised in that：Including as follows Step：
(1) it is 80~40 in mass ratio by active material, conductive agent, binding agent, solvent:5~15:5~15:10~30 Ratio is sufficiently mixed uniformly；
(2) slurry mixed in step (1) is uniformly coated on aluminium foil surface, control thickness is at 50-300 μm；
(3) before the slurry of the aluminium foil surface obtained in step (2) is not completely dried, layer of metal is covered on slurry Net, the slurry that step (1) obtains is evenly coated on wire netting, thickness is 50-300 μm；
(4) electrode slice for obtaining step (3) is dried at 50-150 DEG C in an oven.
In step (1), described active material is the one or more in Carbon Materials, metal oxide, conducting polymer.
In step (1), described conductive agent is the one or more in conductive charcoal, graphite, conducting polymer.
In step (1), described adhesive is the one or more in PVDF, PTFE, CMC, SBR, LA.
In step (1), described solvent is one or both of NMP, water mixing.
In step (3), described wire netting is the one or more in aluminium net, copper mesh, stainless (steel) wire.
Advantages of the present invention：
High areal density electrode of super capacitor that wire netting of the present invention is strengthened and preparation method thereof, is in aluminium foil After surface is coated with one layer of active material, the EDGE CONTACT of layer of metal net, wire netting and aluminium foil is added before slurry is completely dried, One layer of active material is coated with wire netting.The active material of wire netting levels is contacted by mesh, and wire netting is both Good collector can play certain supporting role again, be effectively increased the surface density of electrode slice, while again will not be because For pole piece it is blocked up produce dry linting, chap the problem of.
Wire netting is both that good collector can play certain supporting role, the active material of wire netting levels again Material together, is effectively increased the surface density of electrode slice, while will not produce dry linting, chap because pole piece is blocked up again The problem of splitting.The charcoal base electrode piece prepared with the method, specific capacity can reach in 1mol/L Et4NBF4 PC solution 109F/g。
Brief description of the drawings
Fig. 1 is the structural representation of electrode slice prepared by the embodiment of the present invention 1；
Fig. 2 is electrode slice prepared by the embodiment of the present invention 1, is assembled into the AC impedance curve after ultracapacitor；
Fig. 3 is electrode slice prepared by the embodiment of the present invention 1, is assembled into the charging and discharging curve after ultracapacitor；
Fig. 4 is electrode slice prepared by the embodiment of the present invention 3, is assembled into the charging and discharging curve after ultracapacitor；
Fig. 5 is electrode slice prepared by the embodiment of the present invention 3, is assembled into the cyclic voltammetry curve after ultracapacitor.
Embodiment
The following examples will be further described to the present invention, but not thereby limiting the invention.
Embodiment 1
(CMC and SBR mass ratio are 1 for 4g activated carbons, 0.47g conductive blacks, 9.8g CMC-SBR emulsions:2) mix, add Enter 4ml deionized waters, ball milling 12h, slurry is coated on aluminium foil, it is 150 μm to control thickness, and slurry edge is far from aluminium foil edge 1mm, when solvent will be evaporated completely, one layer of stainless (steel) wire with aluminium foil area equation is covered on slurry, on stainless (steel) wire Be coated with one layer of active material, control thickness as 150 μm, slurry edge far from stainless (steel) wire edge 1mm, with same method plus One layer of stainless (steel) wire, one layer of slurry is coated with, pole piece is placed in baking oven at 120 DEG C and dries 6h.Surface density can reach 28mg/ cm2, it is assembled into button capacitor and carries out electrochemical property test.Wherein use 1mol/LEt4NBF4PC solution be electrolyte. Impedance as shown in Fig. 2 charging and discharging curve as shown in figure 3, specific capacity is 109F/g under 50mA/g current density.
Embodiment 2
(CMC and SBR mass ratio are 1 for 4g activated carbons, 0.47g conductive blacks, 9.8g CMC-SBR emulsions:2) mix, add Enter 4ml deionized waters, ball milling 12h, slurry is coated on aluminium foil, it is 100 μm to control thickness, and slurry edge is far from aluminium foil edge 1mm, when solvent will be evaporated completely, one layer of stainless (steel) wire with aluminium foil area equation is covered on slurry, on stainless (steel) wire Be coated with one layer of active material, control thickness as 100 μm, slurry edge far from stainless (steel) wire edge 1mm, with same method plus One layer of stainless (steel) wire, one layer of slurry is coated with, pole piece is placed in baking oven at 120 DEG C and dries 6h.Surface density can reach 20mg/ cm2, it is assembled into button capacitor and carries out electrochemical property test.Wherein use 1mol/L Et4NBF4PC solution be electrolyte, Specific capacity is 115F/g under 50mA/g current density.
Embodiment 3
(CMC and SBR mass ratio are 1 for 4g activated carbons, 0.47g conductive blacks, 9.8g CMC-SBR emulsions:2) mix, add Enter 4ml deionized waters, ball milling 12h, slurry is coated on aluminium foil, it is 150 μm to control thickness, and slurry edge is far from aluminium foil edge 1mm, when solvent will be evaporated completely, one layer of stainless (steel) wire with aluminium foil area equation is covered on slurry, on stainless (steel) wire One layer of active material is coated with, it is 150 μm to control thickness, and pole piece is placed in baking oven by slurry edge far from stainless (steel) wire edge 1mm 6h is dried at 120 DEG C.Surface density can reach 10mg/cm2, it is assembled into button capacitor and carries out electrochemical property test.Wherein Using 1mol/L Et4NBF4PC solution be electrolyte, charging and discharging curve is as shown in figure 4, cyclic voltammetric is as shown in Figure 5.
Embodiment 4
(CMC and SBR mass ratio are 1 for 4g activated carbons, 0.47g conductive blacks, 9.8g CMC-SBR emulsions:2) mix, add Enter 4ml deionized waters, ball milling 12h, slurry is coated on aluminium foil, it is 100 μm to control thickness, and slurry edge is far from aluminium foil edge 1mm, when solvent will be evaporated completely, one layer of stainless (steel) wire with aluminium foil area equation is covered on slurry, on stainless (steel) wire One layer of active material is coated with, it is 100 μm to control thickness, and pole piece is placed in baking oven by slurry edge far from stainless (steel) wire edge 1mm 6h is dried at 120 DEG C.Surface density can reach 6mg/cm2, it is assembled into button capacitor and carries out electrochemical property test, as a result table This bright electrode slice has good capacitive property.

Claims (6)

  1. A kind of 1. preparation method for the high areal density electrode of super capacitor that wire netting is strengthened, it is characterised in that：Including following step Suddenly：
    (1) it is (40~80) in mass ratio by active material, conductive agent, binding agent, solvent:(5~15):(5~15):(10~ 30) ratio is sufficiently mixed uniformly, forms slurry；
    (2) slurry mixed in step (1) is uniformly coated on aluminium foil surface, control thickness is at 50-300 μm, slurry edge Away from aluminium foil edge 1mm；
    (3) when slurry is not completely dried, one layer of wire netting with aluminium foil area equation is covered on slurry, by step (1) Obtained slurry is evenly coated on wire netting again, and thickness is 50-300 μm, and slurry edge is far from metal network edge 1mm；
    (4) operation of 0 time or 1 time step (3) is repeated；
    (5) electrode slice for obtaining step (4) is dried at 50-150 DEG C in an oven.
  2. 2. the preparation method for the high areal density electrode of super capacitor strengthened according to the wire netting described in claim 1, its feature It is：In step (1), described active material is the one or more in Carbon Materials, metal oxide, conducting polymer.
  3. 3. the preparation method for the high areal density electrode of super capacitor strengthened according to the wire netting described in claim 1, its feature It is：In step (1), described conductive agent is the one or more in conductive charcoal, graphite, conducting polymer.
  4. 4. the preparation method for the high areal density electrode of super capacitor strengthened according to the wire netting described in claim 1, its feature It is：In step (1), the one or more in described binding agent PVDF, PTFE, CMC, SBR, LA.
  5. 5. the preparation method for the high areal density electrode of super capacitor strengthened according to the wire netting described in claim 1, its feature It is：In step (1), described solvent is one or both of NMP, water mixing.
  6. 6. the preparation method for the high areal density electrode of super capacitor strengthened according to the wire netting described in claim 1, its feature It is：In step (3), described wire netting is the one or more in aluminium net, copper mesh, stainless (steel) wire.
CN201410412655.XA 2014-08-21 2014-08-21 High areal density electrode of super capacitor that a kind of wire netting is strengthened and preparation method thereof Active CN104167299B (en)

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CN104671364B (en) * 2015-03-03 2017-03-01 中国科学院过程工程研究所 A kind of same one-step desalting removes the electrochemical wastewater treatment method of hardly degraded organic substance
US9922775B2 (en) * 2015-10-13 2018-03-20 Nanotek Instruments, Inc. Continuous process for producing electrodes for supercapacitors having high energy densities
CN112927952A (en) * 2019-12-06 2021-06-08 中国科学院大连化学物理研究所 Flexible lithium titanate cathode of lithium ion hybrid capacitor and preparation method thereof
CN116199325A (en) * 2023-04-06 2023-06-02 济南大学 Device and method for treating antibiotic wastewater through overcurrent catalytic oxidation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1110008A (en) * 1993-12-09 1995-10-11 瓦尔达电池股份公司 Electrochemical secondary cell
CN102593468A (en) * 2011-01-13 2012-07-18 通用汽车环球科技运作有限责任公司 Wet lamination process for reducing mud cracking in fuel cell components

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1110008A (en) * 1993-12-09 1995-10-11 瓦尔达电池股份公司 Electrochemical secondary cell
CN102593468A (en) * 2011-01-13 2012-07-18 通用汽车环球科技运作有限责任公司 Wet lamination process for reducing mud cracking in fuel cell components

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