CN108023104A - A kind of bipolar plate of vanadium cell and preparation method thereof - Google Patents
A kind of bipolar plate of vanadium cell and preparation method thereof Download PDFInfo
- Publication number
- CN108023104A CN108023104A CN201610953634.8A CN201610953634A CN108023104A CN 108023104 A CN108023104 A CN 108023104A CN 201610953634 A CN201610953634 A CN 201610953634A CN 108023104 A CN108023104 A CN 108023104A
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- Prior art keywords
- bipolar plate
- vanadium cell
- resin
- carbon cloth
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0221—Organic resins; Organic polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0223—Composites
- H01M8/0228—Composites in the form of layered or coated products
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Fuel Cell (AREA)
- Inert Electrodes (AREA)
Abstract
The present invention relates to vanadium cell manufacturing field, is specially a kind of bipolar plate of vanadium cell and preparation method thereof.Select the mode of thermal spraying, spray one layer of resin bed respectively in carbon cloth both sides first, spray one layer of conductive layer after curing respectively in resin bed both sides, then on hot press it is hot-forming.Its mechanical strength of bipolar plates is low in the prior art for present invention solution, and corrosion resistance is poor, and bulk resistance causes greatly the problems such as internal resistance of cell is big, and battery performance is poor.Compared with prior art, the bipolar plate of vanadium cell for preparing of the present invention improves the mechanical strength and corrosion resistance of bipolar plates using carbon cloth as framework material, and carbon cloth is carbon material, good conductivity itself, and bipolar plates electric conductivity is greatly improved.
Description
Technical field
The present invention relates to vanadium cell manufacturing field, is specially a kind of bipolar plate of vanadium cell and preparation method thereof.
Background technology
Vanadium cell, full name are all vanadium ion redox flow battery, are a kind of new green environment protection batteries.Battery follows
Ring efficiency can improve through a variety of ways, such as：Reduce the internal resistance of cell.Bipolar plates be all-vanadium flow battery critical component it
One, be in three mechanical strength, pliability, electric conductivity aspect balances.Numerous studies have been carried out for how to improve bipolar plates,
Such as：New resistivity is the bipolar plates and termination electrode of 0.5 Ω .cm polyethylene, and resistivity is that the PP and SEBS of 0.1 Ω .cm are total to
Polymers is also applied to be tested in experimental vanadium cell.The bipolar plates mechanical strength used in the prior art is low, corrosion resistant
Corrosion is poor, itself poorly conductive and contact resistance between battery component is larger, it is necessary to which the resistance for reducing bipolar plates reaches and subtracts
Few internal resistance of cell, so as to lift battery performance, as above problems demand solves.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to propose a kind of bipolar plate of vanadium cell and its preparation
Method, its mechanical strength of bipolar plates is low in the prior art for solution, and corrosion resistance is poor, and bulk resistance causes greatly the internal resistance of cell big, electricity
The problems such as pond poor performance.
To reach above-mentioned purpose, the technical scheme is that：
A kind of bipolar plate of vanadium cell, uses carbon cloth to select the mode of thermal spraying for framework material, first in carbon cloth both sides
Spray one layer of resin bed respectively, spray one layer of conductive layer after curing respectively in resin bed both sides, then on hot press it is hot-forming.
The bipolar plate of vanadium cell, spraying use the external air pump of spray gun, and powder is loaded in spray gun, passes through air pressure
Mode spraying powder.
The bipolar plate of vanadium cell, carbon cloth are carbon cloth grid cloth, and size of mesh opening uniformly divides in 3mm × 3mm
Cloth, 0.3~0.8mm of thickness, per 80 grams of Gram Mass.
The bipolar plate of vanadium cell, resin are thermoplastic resin or thermosetting resin, thermoplastic resin is polypropylene,
One kind in polyethylene, polyvinyl chloride, thermosetting resin is phenolic resin, one kind in epoxy resin.
The bipolar plate of vanadium cell, conductive layer are one kind in carbon black, graphite and carbon fiber powder.
The bipolar plate of vanadium cell, the particle diameter of powder particle is 0.01mm~3mm, preferably 0.01mm~0.1mm.
The bipolar plate of vanadium cell, the thickness of resin bed is in 0.2mm~20mm, positioned at outermost conductive layer thickness
In 0.02mm~0.10mm.
The bipolar plate of vanadium cell, the thickness of bipolar plate of vanadium cell is in 0.5mm~30mm.
The preparation method of the bipolar plate of vanadium cell, comprises the following steps that：
1) carbon cloth is placed in incubator, temperature control is at 150~300 DEG C；
2) carbon cloth both sides will be got to by air pressure in resin-oatmeal loading spray gun and is used as casing play；
3) after casing play curing, one layer of conductive layer is sprayed respectively in resin bed both sides；
4) put it into it is hot-forming on hot press be made bipolar plate of vanadium cell, hot pressing temperature is 100~300 DEG C, heat
The pressure time is 5~250min, and hot pressing pressure is 1~25MPa.
Advantages of the present invention and beneficial effect are：
1st, compared with prior art, the bipolar plate of vanadium cell that prepared by the present invention, as framework material, is improved using carbon cloth
The mechanical strength and corrosion resistance of bipolar plates, and carbon cloth is carbon material, and good conductivity, bipolar plates electric conductivity itself obtains
It must greatly improve.
2nd, bipolar plate of vanadium cell prepared by the present invention uses carbon cloth as framework material, and bonding agent, outermost are used as by the use of resin
Layer is pure conductive powder body, it the advantages of can balancing machine intensity, pliability, electric conductivity and plate well uniformity, relate to
And formula, the selection of thickness, the contact resistance between bipolar plates and battery component is substantially reduced, improves the voltage effect of battery
Rate, voltage efficiency can improve 2~5%.
Brief description of the drawings
Fig. 1 is the structure diagram of bipolar plate of vanadium cell of the present invention.In figure, 1 carbon cloth；2 resin beds；3 conductive bisques.
Embodiment
The embodiment of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, bipolar plate of vanadium cell of the present invention includes carbon cloth 1, resin bed 2, conductive bisque 3, in 1 both sides of carbon cloth
Resin bed 2, conductive bisque 3 are followed successively by respectively.
Embodiment 1
0.3mm thickness carbon cloths are placed in incubator, temperature control is at 200 DEG C, by the polypropylene powder that particle diameter is 0.04mm
Load in spray gun, be sprayed in carbon cloth both side surface, coating layer thickness 0.5mm, then particle diameter is sprayed on resin for 0.02mm graphite powders
In layer both side surface, coating layer thickness 0.05mm, then put it into mould and vanadium cell use pair is made after hot pressing on hot press
Pole plate, hot pressing temperature are 175 DEG C, hot pressing time 55min, hot pressing pressure 18MPa.
Bipolar plates manufactured in the present embodiment assemble 2KW vanadium cells, and battery charging and discharging performance parameter is：Coulombic efficiency
95.2%, voltage efficiency 85.8%, energy efficiency 81.7%, compared with existing carbon moulds bipolar plates, voltage efficiency improves
4.3%.
Embodiment 2
0.8mm thickness carbon cloths are placed in incubator, temperature control is at 250 DEG C, by the polypropylene powder that particle diameter is 0.05mm
Load in spray gun, be sprayed in carbon cloth both side surface, coating layer thickness 1.0mm, then particle diameter is sprayed on resin for 0.02mm carbon powders
In layer both side surface, coating layer thickness 0.1mm, then put it into mould and vanadium cell is made after hot pressing on hot press with bipolar
Plate, hot pressing temperature are 185 DEG C, hot pressing time 25min, hot pressing pressure 25MPa.
Bipolar plates manufactured in the present embodiment assemble 2KW vanadium cells, and battery charging and discharging performance parameter is：Coulombic efficiency
96.5%, voltage efficiency 86.5%, energy efficiency 83.5%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 5%.
Embodiment 3
0.5mm thickness carbon cloths are placed in incubator, temperature control is at 210 DEG C, by the polyethylene powder that particle diameter is 0.06mm
Load in spray gun, be sprayed in carbon cloth both side surface, coating layer thickness 0.5mm, then particle diameter is sprayed on tree for 0.10mm carbon fiber powders
In lipid layer both side surface, coating layer thickness 0.13mm, then put it into mould and vanadium cell use is made after hot pressing on hot press
Bipolar plates, hot pressing temperature are 155 DEG C, hot pressing time 35min, hot pressing pressure 20MPa.
Bipolar plates manufactured in the present embodiment assemble 2KW vanadium cells, and battery charging and discharging performance parameter is：Coulombic efficiency
95.9%, voltage efficiency 86.0%, energy efficiency 82.5%, compared with existing carbon moulds bipolar plates, voltage efficiency improves
4.5%.
Embodiment 4
0.6mm thickness carbon cloths are placed in incubator, temperature control is at 200 DEG C, by the polypropylene powder that particle diameter is 0.05mm
Load in spray gun, be sprayed in carbon cloth both side surface, coating layer thickness 0.8mm, then particle diameter is sprayed on resin for 0.04mm graphite powders
In layer both side surface, coating layer thickness 0.08mm, then put it into mould and vanadium cell use pair is made after hot pressing on hot press
Pole plate, hot pressing temperature are 185 DEG C, hot pressing time 30min, hot pressing pressure 23MPa.
Bipolar plates manufactured in the present embodiment assemble 2KW vanadium cells, and battery charging and discharging performance parameter is：Coulombic efficiency
96.0%, voltage efficiency 85.6%, energy efficiency 82.6%, compared with existing carbon moulds bipolar plates, voltage efficiency improves
4.1%.
Claims (9)
- A kind of 1. bipolar plate of vanadium cell, it is characterised in that：Carbon cloth is used to select the mode of thermal spraying, first for framework material Spray one layer of resin bed respectively in carbon cloth both sides, spray one layer of conductive layer, then the heat on hot press after curing respectively in resin bed both sides It is molded.
- 2. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：Spraying uses the external air pump of spray gun, by powder Body loads in spray gun, the spraying powder by way of air pressure.
- 3. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：Carbon cloth is carbon cloth grid cloth, grid Size is uniformly distributed in 3mm × 3mm, 0.3~0.8mm of thickness, per 80 grams of Gram Mass.
- 4. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：Resin is thermoplastic resin or thermosetting property tree Fat, thermoplastic resin is polypropylene, one kind in polyethylene, polyvinyl chloride, and thermosetting resin is phenolic resin, in epoxy resin One kind.
- 5. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：Conductive layer is carbon black, graphite and carbon fiber One kind in powder.
- 6. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：The particle diameter of powder particle for 0.01mm~ 3mm, preferably 0.01mm~0.1mm.
- 7. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：The thickness of resin bed in 0.2mm~20mm, Positioned at outermost conductive layer thickness in 0.02mm~0.10mm.
- 8. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that：The thickness of bipolar plate of vanadium cell exists 0.5mm~30mm.
- 9. the preparation method of the bipolar plate of vanadium cell described in a kind of one of claim 1 to 8, it is characterised in that specific steps It is as follows：1) carbon cloth is placed in incubator, temperature control is at 150~300 DEG C；2) carbon cloth both sides will be got to by air pressure in resin-oatmeal loading spray gun and is used as casing play；3) after casing play curing, one layer of conductive layer is sprayed respectively in resin bed both sides；4) put it into it is hot-forming on hot press be made bipolar plate of vanadium cell, hot pressing temperature is 100~300 DEG C, during hot pressing Between be 5~250min, hot pressing pressure is 1~25MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953634.8A CN108023104B (en) | 2016-11-03 | 2016-11-03 | Bipolar plate for vanadium battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953634.8A CN108023104B (en) | 2016-11-03 | 2016-11-03 | Bipolar plate for vanadium battery and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108023104A true CN108023104A (en) | 2018-05-11 |
| CN108023104B CN108023104B (en) | 2020-09-18 |
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Cited By (6)
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|---|---|---|---|---|
| WO2020098106A1 (en) * | 2018-11-13 | 2020-05-22 | 中南大学 | Integrated bipolar electrode, preparation method therefor and application thereof |
| CN111905569A (en) * | 2020-08-18 | 2020-11-10 | 巨轮智能装备股份有限公司 | Continuous manufacturing method of partition board for electrodialysis membrane stack |
| CN112687906A (en) * | 2020-12-28 | 2021-04-20 | 大连博融新材料有限公司 | Multi-layer composite bipolar plate with flow channels, production method and application thereof |
| CN114976097A (en) * | 2022-04-22 | 2022-08-30 | 同济大学 | Layered composite graphite polar plate for fuel cell and preparation method thereof |
| CN115447215A (en) * | 2022-07-26 | 2022-12-09 | 北京国电锐新科技有限公司 | Preparation method of conductive sheet, conductive sheet and novel flow battery bipolar plate |
| CN115699372A (en) * | 2020-06-05 | 2023-02-03 | 株式会社有泽制作所 | Separator member for fuel cell and method for producing same |
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| WO2020098106A1 (en) * | 2018-11-13 | 2020-05-22 | 中南大学 | Integrated bipolar electrode, preparation method therefor and application thereof |
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| CN111905569A (en) * | 2020-08-18 | 2020-11-10 | 巨轮智能装备股份有限公司 | Continuous manufacturing method of partition board for electrodialysis membrane stack |
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| CN112687906A (en) * | 2020-12-28 | 2021-04-20 | 大连博融新材料有限公司 | Multi-layer composite bipolar plate with flow channels, production method and application thereof |
| CN112687906B (en) * | 2020-12-28 | 2022-05-13 | 大连博融新材料有限公司 | Multi-layer composite bipolar plate with flow channels, production method and application thereof |
| CN114976097A (en) * | 2022-04-22 | 2022-08-30 | 同济大学 | Layered composite graphite polar plate for fuel cell and preparation method thereof |
| CN114976097B (en) * | 2022-04-22 | 2024-02-27 | 同济大学 | Layered composite graphite polar plate for fuel cell and preparation method thereof |
| CN115447215A (en) * | 2022-07-26 | 2022-12-09 | 北京国电锐新科技有限公司 | Preparation method of conductive sheet, conductive sheet and novel flow battery bipolar plate |
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| CN108023104B (en) | 2020-09-18 |
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