CN104167299A - Metal mesh reinforced high-surface-density super-capacitor electrode and preparation method thereof - Google Patents
Metal mesh reinforced high-surface-density super-capacitor electrode and preparation method thereof Download PDFInfo
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- CN104167299A CN104167299A CN201410412655.XA CN201410412655A CN104167299A CN 104167299 A CN104167299 A CN 104167299A CN 201410412655 A CN201410412655 A CN 201410412655A CN 104167299 A CN104167299 A CN 104167299A
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- wire netting
- metal mesh
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/13—Energy storage using capacitors
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Abstract
A metal mesh reinforced high-surface-density super-capacitor electrode is characterized in that an active substance layer is coated on an aluminum foil, a metal mesh is added on the active substance layer, and then an active substance layer is coated on the metal mesh again. A preparation method of the metal mesh reinforced high-surface-density super-capacitor electrode comprises of the steps of fully and evenly mixing active substance, a conductive agent, a bonding agent and a solvent; evenly coating a mixed slurry on the surface of the aluminum foil; covering the metal mesh on the slurry and then evenly coating the obtained slurry on the metal mesh to obtain an electrode slice before the slurry on the surface of the aluminum foil is not completely dried, and drying the electrode slice. The metal mesh reinforced high-surface-density super-capacitor electrode and the preparation method have the advantages that the metal mesh is a good current collector and can also play a certain supporting role, the active substance materials on an upper layer and a lower layer of the metal mesh are in contact with each other, the surface density of the electrode slice is effectively increased, and meanwhile the powder falling and chapping problems caused by overlarge thickness of the electrode slice are not produced.
Description
Technical field
The present invention relates to electrode of super capacitor technology field, be specially high areal density electrode of super capacitor of a kind of wire netting reinforcement and preparation method thereof, its feature is that the electrode slice of preparation has higher high areal density.
Background technology
Ultracapacitor is called again electrochemical capacitor or gold capacitor, because of its have energy density high, have extended cycle life, advantage is more and more the subject to people's such as fast charging and discharging under large electric current, environmental friendliness, operating temperature range are wide concern.Ultracapacitor has the feature of high-specific-power and the battery high-energy-density of physical capacitor concurrently, has a wide range of applications in many fields such as electric automobile, solar energy equipment, uninterrupted power supply, military affairs, Aero-Space.
The key factor that determines ultracapacitor performance is its electrode material using, and it is determining many main performance index of electrochemical capacitor.Electrode for super capacitor material mainly comprises Carbon Materials, metal oxide and nitride, conducting polymer etc.But any material is because the deciding factors such as structure have certain theoretical capacity, when material has been given play to after its capacity completely, want the capacity that improves again ultracapacitor only to start with from the process aspect of capacitor, the surface density that improves electrode slice is exactly an effective method.Surface density is the quality in unit are, and the mass penalty in unit are is equivalent to add more active material in capacitor, and the capacity of whole capacitor can significantly improve.
Tradition increases the method for surface density and exactly pole piece is made to thick, double spread, and the problem of bringing is to make internal resistance increase, and material on electrode slice is easily chapped, come off.This patent adopts the strong method of wire netting, add layer of metal net at electrode surface in the past, on wire netting, be coated with one deck active material, the upper and lower active material of wire netting is connected by mesh again, has solved the problem of chapping of causing because pole piece is blocked up, dry linting.The EDGE CONTACT of wire netting and aluminium foil, wire netting is again the good conductor of electronics, can not increase the internal resistance of capacitor.The capacity that increases ultracapacitor by increasing the method for surface density, has a wide range of applications.
Summary of the invention
The object of the invention is to improve the surface density of electrode slice, thereby increase the capacity of ultracapacitor, solve the internal resistance causing because pole piece is blocked up large, pole piece dry linting, the problem of chapping, spy provides high areal density electrode of super capacitor of a kind of wire netting reinforcement and preparation method thereof.
The high areal density electrode of super capacitor that wire netting is strengthened, is characterized in that: the high areal density electrode of super capacitor that described wire netting is strengthened, on aluminium foil, be coated with one deck active material, and be coated with again one deck active material after adding layer of metal net in the above.
A preparation method for the high areal density electrode of super capacitor that wire netting is strengthened, is characterized in that: comprise the steps:
(1) be that the ratio of 80～40:5～15:5～15:10～30 fully mixes in mass ratio by active material, conductive agent, binding agent, solvent;
(2) slurry mixing in step (1) is uniformly coated on to aluminium foil surface, controls thickness at 50-300 μ m;
(3) slurry of the aluminium foil surface obtaining in step (2) before bone dry, does not cover layer of metal net on slurry, and the slurry that step (1) is obtained is evenly coated on wire netting, and thickness is 50-300 μ m;
(4) electrode slice step (3) being obtained is dried at 50-150 DEG C in baking oven.
In step (1), described active material is one or more in Carbon Materials, metal oxide, conducting polymer.
In step (1), described conductive agent is one or more in conduction charcoal, graphite, conducting polymer.
In step (1), described adhesive is one or more in PVDF, PTFE, CMC, SBR, LA.
In step (1), described solvent is a kind of in NMP, water or both mixing.
In step (3), described wire netting is one or more in aluminium net, copper mesh, stainless (steel) wire.
Advantage of the present invention:
High areal density electrode of super capacitor that wire netting of the present invention is strengthened and preparation method thereof, be after aluminium foil surface coating one deck active material, before slurry bone dry, add layer of metal net, the EDGE CONTACT of wire netting and aluminium foil is coated with one deck active material on wire netting.The active material of wire netting levels contacts by mesh, wire netting is that good collector can play again certain supporting role, effectively increase the surface density of electrode slice, the problem that can not produce dry linting because pole piece is blocked up, chap again simultaneously.
Wire netting is that good collector can play again certain supporting role, and the active material of wire netting levels contacts, and has effectively increased the surface density of electrode slice, the problem that can not produce dry linting because pole piece is blocked up, chap again simultaneously.The charcoal base electrode sheet of preparing by the method, in the PC of 1mol/L Et4NBF4 solution, specific capacity can reach 109F/g.
Brief description of the drawings
Fig. 1 is the structural representation of the electrode slice prepared of 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 the present invention, but not thereby limiting the invention.
Embodiment 1
4g active carbon, 0.47g conductive black, 9.8g CMC-SBR emulsion (CMC is 1:2 with the mass ratio of SBR) is mixed, add 4ml deionized water, ball milling 12h, slurry is coated on aluminium foil, controlling thickness is 150 μ m, slurry edge is far from aluminium foil edge 1mm, in the time that solvent is about to be evaporated completely, on slurry, cover the stainless (steel) wire that one deck equates with aluminium foil area, on stainless (steel) wire, be coated with one deck active material, controlling thickness is 150 μ m, slurry edge is far from stainless (steel) wire edge 1mm, use the same method and adding last layer stainless (steel) wire, coating one deck slurry, pole piece is placed in to baking oven dry 6h at 120 DEG C.Surface density can reach 28mg/cm
2, be assembled into button capacitor and carry out electrochemical property test.Wherein adopt 1mol/LEt
4nBF
4pC solution be electrolyte.As shown in Figure 2, as shown in Figure 3, under the current density of 50mA/g, specific capacity is 109F/g to charging and discharging curve in impedance.
Embodiment 2
4g active carbon, 0.47g conductive black, 9.8g CMC-SBR emulsion (CMC is 1:2 with the mass ratio of SBR) is mixed, add 4ml deionized water, ball milling 12h, slurry is coated on aluminium foil, controlling thickness is 100 μ m, slurry edge is far from aluminium foil edge 1mm, in the time that solvent is about to be evaporated completely, on slurry, cover the stainless (steel) wire that one deck equates with aluminium foil area, on stainless (steel) wire, be coated with one deck active material, controlling thickness is 100 μ m, slurry edge is far from stainless (steel) wire edge 1mm, use the same method and adding last layer stainless (steel) wire, coating one deck slurry, pole piece is placed in to baking oven dry 6h at 120 DEG C.Surface density can reach 20mg/cm
2, be assembled into button capacitor and carry out electrochemical property test.Wherein adopt 1mol/L Et
4nBF
4pC solution be electrolyte, under the current density of 50mA/g, specific capacity is 115F/g.
Embodiment 3
4g active carbon, 0.47g conductive black, 9.8g CMC-SBR emulsion (CMC is 1:2 with the mass ratio of SBR) are mixed, add 4ml deionized water, ball milling 12h, slurry is coated on aluminium foil, controlling thickness is 150 μ m, slurry edge is far from aluminium foil edge 1mm, in the time that solvent is about to be evaporated completely, on slurry, cover the stainless (steel) wire that one deck equates with aluminium foil area, on stainless (steel) wire, be coated with one deck active material, controlling thickness is 150 μ m, and slurry edge, far from stainless (steel) wire edge 1mm, is placed in baking oven dry 6h at 120 DEG C by pole piece.Surface density can reach 10mg/cm
2, be assembled into button capacitor and carry out electrochemical property test.Wherein adopt 1mol/L Et
4nBF
4pC solution be electrolyte, as shown in Figure 4, cyclic voltammetric is as shown in Figure 5 for charging and discharging curve.
Embodiment 4
4g active carbon, 0.47g conductive black, 9.8g CMC-SBR emulsion (CMC is 1:2 with the mass ratio of SBR) are mixed, add 4ml deionized water, ball milling 12h, slurry is coated on aluminium foil, controlling thickness is 100 μ m, slurry edge is far from aluminium foil edge 1mm, in the time that solvent is about to be evaporated completely, on slurry, cover the stainless (steel) wire that one deck equates with aluminium foil area, on stainless (steel) wire, be coated with one deck active material, controlling thickness is 100 μ m, and slurry edge, far from stainless (steel) wire edge 1mm, is placed in baking oven dry 6h at 120 DEG C by pole piece.Surface density can reach 6mg/cm
2, being assembled into button capacitor and carrying out electrochemical property test, result shows that this electrode slice has good capacitive property.
Claims (7)
1. the high areal density electrode of super capacitor that wire netting is strengthened, is characterized in that: the high areal density electrode of super capacitor that described wire netting is strengthened, on aluminium foil, be coated with one deck active material, and be coated with again one deck active material after adding layer of metal net in the above.
2. a preparation method for the high areal density electrode of super capacitor that wire netting as claimed in claim 1 is strengthened, is characterized in that: comprise the steps:
(1) be that the ratio of 80～40:5～15:5～15:10～30 fully mixes in mass ratio by active material, conductive agent, binding agent, solvent;
(2) slurry mixing in step (1) is uniformly coated on to aluminium foil surface, controls thickness at 50-300 μ m;
(3) slurry of the aluminium foil surface obtaining in step (2) before bone dry, does not cover layer of metal net on slurry, and the slurry that step (1) is obtained is evenly coated on wire netting, and thickness is 50-300 μ m;
(4) electrode slice step (3) being obtained is dried at 50-150 DEG C in baking oven.
3. the high areal density electrode of super capacitor preparation method who strengthens according to wire netting claimed in claim 2, is characterized in that: in step (1), described active material is one or more in Carbon Materials, metal oxide, conducting polymer.
4. the high areal density electrode of super capacitor preparation method who strengthens according to wire netting claimed in claim 2, is characterized in that: in step (1), described conductive agent is one or more in conduction charcoal, graphite, conducting polymer.
5. the high areal density electrode of super capacitor preparation method who strengthens according to wire netting claimed in claim 2, is characterized in that: in step (1), described adhesive is one or more in PVDF, PTFE, CMC, SBR, LA.
6. the high areal density electrode of super capacitor preparation method who strengthens according to wire netting claimed in claim 2, is characterized in that: in step (1), described solvent is a kind of in NMP, water or both mixing.
7. the high areal density electrode of super capacitor preparation method who strengthens according to wire netting claimed in claim 2, is characterized in that: in step (3), described wire netting is one or more in aluminium net, copper mesh, stainless (steel) wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410412655.XA CN104167299B (en) | 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 |
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| CN201410412655.XA CN104167299B (en) | 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 |
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| CN104167299B CN104167299B (en) | 2017-11-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671364A (en) * | 2015-03-03 | 2015-06-03 | 中国科学院过程工程研究所 | Electrochemical wastewater treatment method for removing salts and refractory organic matters synchronously |
| CN108140485A (en) * | 2015-10-13 | 2018-06-08 | 纳米技术仪器公司 | For producing the continuation method for the electrode for being used for the ultracapacitor with high-energy density |
| 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)
| 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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2014
- 2014-08-21 CN CN201410412655.XA patent/CN104167299B/en active Active
Patent Citations (2)
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671364A (en) * | 2015-03-03 | 2015-06-03 | 中国科学院过程工程研究所 | Electrochemical wastewater treatment method for removing salts and refractory organic matters synchronously |
| 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 |
| CN108140485A (en) * | 2015-10-13 | 2018-06-08 | 纳米技术仪器公司 | For producing the continuation method for the electrode for being used for the ultracapacitor with high-energy density |
| CN108140485B (en) * | 2015-10-13 | 2022-04-01 | 纳米技术仪器公司 | Continuous process for producing electrodes for supercapacitors having a high energy density |
| 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 |
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| CN104167299B (en) | 2017-11-28 |
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