CN103022531B - Method for preparing bipolar plate of vanadium cell - Google Patents
Method for preparing bipolar plate of vanadium cell Download PDFInfo
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- CN103022531B CN103022531B CN201210552504.5A CN201210552504A CN103022531B CN 103022531 B CN103022531 B CN 103022531B CN 201210552504 A CN201210552504 A CN 201210552504A CN 103022531 B CN103022531 B CN 103022531B
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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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to the field of manufacturing of vanadium cells, in particular to a method for preparing a bipolar plate of a vanadium cell, and solves the problems that the degree of mixing uniformity of materials is difficult to ensure, the resistivity of a polymer-carbon black composite bipolar plate is very high, the surface resistance of the bipolar plate is increased due to electrochemical corrosion and the like in the prior art. In order to solve the problems, according to the working requirement of the vanadium cell, a carbon fiber electrode with high corrosion resistance is taken as a conductive material to prepare the bipolar plate of the vanadium cell which is high in electric conductivity and simple in manufacturing procedure. The bipolar plate comprises a resin plate and an electrode; and the resin plate and the electrode are thermally pressed and molded to facilitate resin to completely permeate to the electrode so as to prepare the bipolar plate of the vanadium cell. According to the method, the resin is injected to the electrode to serve as a framework material, so that the conductivity is approximate to that of a graphite felt, the electrochemical corrosion resistance is high in the using process, the resistance is not increased and the reliability of the vanadium cell is improved.
Description
Technical field
The present invention relates to vanadium cell and manufacture field, be specially the preparation method of a kind of vanadium cell bipolar plates.
Background technology
Vanadium cell, full name is all vanadium ion redox flow battery, is a kind of new green environment protection battery.Bipolar plates is one of critical component of all-vanadium flow battery, plays a part to connect both positive and negative polarity the interior circuit of turn-on battery of different monocells, requires it to possess good conductivity, mechanical strength, chemically-resistant oxidation and electrochemical corrosion performance.Selectable material mainly comprises metal double polar plates, pure graphite bi-polar plate and polymer-carbon materials composite dual-electrode plates.Because there is problem metal material bipolar plates price and corrosion resistance aspect, seldom studied and use.When pure graphite bi-polar plate processing and installation, easily rupture, in the time of large-scale industrial application, be restricted.But polymer-carbon materials composite dual-electrode plates adopts mill or the mixing resin of extruder and conductive filler all has the drawback that is difficult to mix, and conductivity is all on the low side.
Although bipolar plates research has obtained certain achievement, but still there is the problem that needs solution.Bipolar plates resistivity prepared by employing conventional hybrid mode, higher than 0.5 Ω .cm, is difficult to meet cell process to electric conductivity requirement.And, in use because causing bipolar plate surfaces carbon black granules, electrochemical corrosion peels off, and resistance increases, and causes and alters liquid, when serious, may cause battery failure.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the invention is to propose the preparation method of a kind of vanadium cell bipolar plates, solve the mixing uniformity coefficient of material in prior art and be difficult to ensure, the too high and electrochemical corrosion of polymer-carbon black composite dual-electrode plates resistivity causes the problems such as bipolar plate surfaces resistance increase.
For achieving the above object, technical scheme of the present invention is:
The preparation method of bipolar plates for a kind of vanadium cell, this bipolar plates comprises resin plate and electrode, by resin plate and electrode by hot-forming mode, resin is penetrated in electrode completely, prepare vanadium cell bipolar plates, its resistivity can reach 0.03-0.1 Ω .cm, and surface carbon fiber electrochemical corrosion resistant, there will not be the phenomenon of sheet resistance increase, improved the reliability of vanadium cell.
The preparation method of bipolar plates for described vanadium cell, resin plate is thermoplastic sheet or thermosetting plate.
The preparation method of bipolar plates for described vanadium cell, resin plate adopts the material of one or more mixing in polyvinyl resin plate (PE), acrylic resin plate (PP), vinylchloride resin plate (PVC), polycaprolactam plate (PA6), acrylonitrile-butadiene-styrene copolymer plate (ABS) to make.
The preparation method of bipolar plates for described vanadium cell, electrode adopts carbon felt or graphite felt.
The preparation method of bipolar plates for described vanadium cell, concrete steps are as follows:
1) electrode and macromolecule resin plate are put into mould, by hot press hot pressing, hot pressing temperature is 100～300 DEG C, and hot pressing time is 5～200min, and hot pressing pressure is 0.1～25MPa;
2) after taking-up, mould is put into cold press, the temperature of colding pressing is 5～30 DEG C, and the time of colding pressing is 5～200min, and the pressure of colding pressing is 0.1～25MPa;
3) take out and be vanadium cell bipolar plates.
Preferably, 170～250 DEG C of hot pressing temperatures, hot pressing time is 20～100min, hot pressing pressure is 1～15MPa.
Preferably, the temperature of colding pressing is 10～25 DEG C, and the time of colding pressing is 20～100min, and the pressure of colding pressing is 1～15MPa.
The preparation method of bipolar plates for described vanadium cell, the thickness of resin plate is 2～10mm.
The preparation method of bipolar plates for described vanadium cell, the thickness of carbon felt or graphite felt is 2～10mm, the bulk density of carbon felt or graphite felt is 0.05～0.20g/cm
3.
Advantage of the present invention:
1, in prior art, the mixing lack of homogeneity of carbon black and resin, and in use peel off because electrochemical corrosion causes bipolar plate surfaces carbon black granules, resistance increases, and causes and alters liquid, causes battery failure.In order to address the above problem, the present invention is according to vanadium cell job requirement, adopt the strong carbon fiber electrically of corrosion resistance very electric conducting material prepare that conductance is high, the simple vanadium cell bipolar plates of manufacturing procedure, by resin plate and electrode by hot-forming mode, resin is penetrated in electrode completely, prepares vanadium cell bipolar plates.
2, vanadium cell of the present invention is using resin by injection in electrode as framework material by the preparation method of bipolar plates, and conductivity is close to graphite felt, and unusual electrochemical corrosion resistant in use, and resistance can not increase, and has improved the reliability of vanadium cell.
3, vanadium cell bipolar plates of the present invention, adopts the mode of resin plate and the direct hot pressing of electrode, and the mixing uniformity coefficient of material that has solved existing processing technology existence is poor, the too high problem of polymer-carbon black composite dual-electrode plates resistivity.
4, vanadium cell of the present invention bipolar plates preparation technology, can prepare large area bipolar plates, and processing technology is simple, greatly reduces cost.
Embodiment
Below by embodiment in detail the present invention is described in detail.
Embodiment 1
By graphite felt thick 3mm, (bulk density is 0.15g/cm
3) and the thick polyvinyl resin plate (PE) of 2mm put into mould, by hot press hot pressing, hot pressing temperature is 180 DEG C, hot pressing time is 20min, hot pressing pressure is 2MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 5 DEG C, and the time of colding pressing is 20min, and the pressure of colding pressing is 2MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.1 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 94.1%, voltage efficiency 83.1%, energy efficiency 78.1%.
Embodiment 2
By graphite felt thick 5mm, (bulk density is 0.15g/cm
3) and the thick acrylic resin plate (PP) of 4mm put into mould, by hot press hot pressing, hot pressing temperature is 190 DEG C, hot pressing time is 25min, hot pressing pressure is 3MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 15 DEG C, and the time of colding pressing is 30min, and the pressure of colding pressing is 2MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.08 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 93.2%, voltage efficiency 84.2%, energy efficiency 78.5%.
Embodiment 3
By graphite felt thick 6mm, (bulk density is 0.20g/cm
3) and the thick vinylchloride resin plate (PVC) of 6mm put into mould, by hot press hot pressing, hot pressing temperature is 120 DEG C, hot pressing time is 35min, hot pressing pressure is 1MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 10 DEG C, and the time of colding pressing is 60min, and the pressure of colding pressing is 1MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.07 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 95.0%, voltage efficiency 84.3%, energy efficiency 80.1%.
Embodiment 4
By graphite felt thick 7mm, (bulk density is 0.20g/cm
3) and the thick polycaprolactam plate (PA6) of 6mm put into mould, by hot press hot pressing, hot pressing temperature is 250 DEG C, hot pressing time is 45min, hot pressing pressure is 4MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 10 DEG C, and the time of colding pressing is 50min, and the pressure of colding pressing is 4MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.09 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 92.6%, voltage efficiency 83.8%, energy efficiency 77.6%.
Embodiment 5
By graphite felt thick 5mm, (bulk density is 0.15g/cm
3) and the thick acrylonitrile-butadiene-styrene copolymer plate (ABS) of 4mm put into mould, by hot press hot pressing, hot pressing temperature is 210 DEG C, hot pressing time is 25min, hot pressing pressure is 2MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 20 DEG C, and the time of colding pressing is 40min, and the pressure of colding pressing is 1MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.07.cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 92.6%, voltage efficiency 85.1%, energy efficiency 78.8%.
Embodiment 6
By carbon felt thick 5mm, (bulk density is 0.10g/cm
3) and the thick polyvinyl resin plate (PE) of 4mm put into mould, by hot press hot pressing, hot pressing temperature is 160 DEG C, hot pressing time is 40min, hot pressing pressure is 1MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 10 DEG C, and the time of colding pressing is 60min, and the pressure of colding pressing is 1MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.05 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 92.4%, voltage efficiency 86.5%, energy efficiency 79.9%.
Embodiment 7
By graphite felt thick 3mm, (bulk density is 0.20g/cm
3) and the thick resin plate (resin plate that acrylic resin PP and polyvinyl resin PE are mixed) of 4mm put into mould, by hot press hot pressing, hot pressing temperature is 230 DEG C, hot pressing time is 10min, hot pressing pressure is 5MPa; After taking-up, mould is put into cold press, the temperature of colding pressing is 20 DEG C, and the time of colding pressing is 50min, and the pressure of colding pressing is 5MPa; Taking-up is vanadium cell bipolar plates.
The specific insulation of the conductive bipolar plate of preparation is: 0.08 Ω .cm.As vanadium cell both positive and negative polarity collector plate, battery charging and discharging performance parameter is: coulombic efficiency 93.5%, voltage efficiency 84.6%, energy efficiency 78.5%.
Result shows, the present invention can prepare vanadium cell bipolar plates resistivity can reach 0.03-0.1 Ω .cm, and surface carbon fiber electrochemical corrosion resistant, and the phenomenon that there will not be sheet resistance to increase has improved the reliability of vanadium cell, meets vanadium cell and uses needs.
Claims (8)
1. the preparation method of a vanadium cell use bipolar plates, it is characterized in that: this bipolar plates comprises resin plate and electrode, by resin plate and electrode by hot-forming mode, resin is penetrated in electrode completely, prepare vanadium cell bipolar plates, its resistivity reaches 0.03-0.1 Ω .cm, and concrete steps are as follows:
1) electrode and macromolecule resin plate are put into mould, by hot press hot pressing, hot pressing temperature is 100～300 DEG C, and hot pressing time is 5～200min, and hot pressing pressure is 0.1～25MPa;
2) after taking-up, mould is put into cold press, the temperature of colding pressing is 5～30 DEG C, and the time of colding pressing is 5～200min, and the pressure of colding pressing is 0.1～25MPa;
3) take out and be vanadium cell bipolar plates.
2. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that: resin plate is thermoplastic sheet or thermosetting plate.
3. the preparation method by bipolar plates according to vanadium cell claimed in claim 2, is characterized in that: resin plate adopts the material of one or more mixing in polyvinyl resin plate, acrylic resin plate, vinylchloride resin plate, polycaprolactam plate, acrylonitrile-butadiene-styrene copolymer plate to make.
4. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that: electrode adopts carbon felt or graphite felt.
5. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that, in step (1), preferably, and 170～250 DEG C of hot pressing temperatures, hot pressing time is 20～100min, hot pressing pressure is 1～15MPa.
6. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that, in step (2), preferably, the temperature of colding pressing is 10～25 DEG C, and the time of colding pressing is 20～100min, and the pressure of colding pressing is 1～15MPa.
7. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that: the thickness of resin plate is 2～10mm.
8. the preparation method by bipolar plates according to vanadium cell claimed in claim 1, is characterized in that: the thickness of carbon felt or graphite felt is 2～10mm, and the bulk density of carbon felt or graphite felt is 0.05～0.20g/cm
3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210552504.5A CN103022531B (en) | 2012-12-18 | 2012-12-18 | Method for preparing bipolar plate of vanadium cell |
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| CN201210552504.5A CN103022531B (en) | 2012-12-18 | 2012-12-18 | Method for preparing bipolar plate of vanadium cell |
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| CN103022531B true CN103022531B (en) | 2014-12-10 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105322197A (en) * | 2014-08-01 | 2016-02-10 | 大连融科储能技术发展有限公司 | High specific surface area bipolar plate for flow battery and preparation method thereof |
| CN104409740B (en) * | 2014-11-28 | 2016-08-03 | 中国科学院金属研究所 | A kind of Novel vanadium battery bipolar plates and preparation method thereof |
| CN106848346B (en) * | 2017-03-06 | 2019-07-26 | 昆山知氢信息科技有限公司 | Flow battery bipolar plates and preparation method thereof |
| CN108598519A (en) * | 2018-05-18 | 2018-09-28 | 深圳市晶特智造科技有限公司 | A kind of bipolar plates and preparation method thereof |
| CN110620240A (en) * | 2018-06-19 | 2019-12-27 | 北京普能世纪科技有限公司 | Preparation method of integrated electrode and vanadium redox flow battery |
| CN110176608A (en) * | 2019-04-29 | 2019-08-27 | 上海电气集团股份有限公司 | A kind of compound bipolar plates of thermosetting resin base used for all-vanadium redox flow battery and preparation method thereof |
| CN117207561B (en) * | 2023-11-07 | 2024-02-23 | 寰泰储能科技股份有限公司 | Bipolar plate for all-vanadium redox flow battery and preparation method thereof |
| CN117691146A (en) * | 2024-01-29 | 2024-03-12 | 江苏美淼储能科技有限公司 | Preparation process of flow battery bipolar plate |
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| CN101308924B (en) * | 2007-05-18 | 2011-05-04 | 大连融科储能技术发展有限公司 | Flexibility enhanced bipolar plate for liquid energy-storing battery and manufacture thereof |
| CN202004086U (en) * | 2011-04-15 | 2011-10-05 | 云廷志 | Integral composite electrode plate |
| CN102738479A (en) * | 2011-04-15 | 2012-10-17 | 云廷志 | Integrated composite plate electrode |
| CN102569824A (en) * | 2011-12-30 | 2012-07-11 | 黄权波 | Bipolar plate of integrated composite electrode, and manufacturing method and application thereof |
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