CN108023106A - Bipolar plate of vanadium cell and preparation method thereof - Google Patents

Bipolar plate of vanadium cell and preparation method thereof Download PDF

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Publication number
CN108023106A
CN108023106A CN201610958797.5A CN201610958797A CN108023106A CN 108023106 A CN108023106 A CN 108023106A CN 201610958797 A CN201610958797 A CN 201610958797A CN 108023106 A CN108023106 A CN 108023106A
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China
Prior art keywords
vanadium cell
bipolar plate
powder
resin
cell described
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CN201610958797.5A
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CN108023106B (en
Inventor
侯绍宇
杨志刚
刘建国
严川伟
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Institute of Metal Research of CAS
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Institute of Metal Research of CAS
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/18Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • H01M8/184Regeneration by electrochemical means
    • H01M8/188Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0202Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204Non-porous and characterised by the material
    • H01M8/0223Composites
    • H01M8/0228Composites in the form of layered or coated products
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel 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)
  • Battery Electrode And Active Subsutance (AREA)
  • Fuel Cell (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.Metal material is used as framework material, selects the mode of thermal spraying, sprays one layer of mixture being made of conducting powder and resin respectively in metal material both sides first, sprays one layer of conductive powder body after curing respectively in both sides, then on hot press it is hot-forming.The problems such as present invention solves in the prior art that its mechanical strength of bipolar plates is low, poorly conductive, in vertical direction poorly conductive, and the contact resistance between battery component is larger.Compared with prior art, the bipolar plate of vanadium cell that prepared by the present invention, as framework material, substantially increases the mechanical strength of bipolar plates, under the effect of a variety of sealing means, performance is stablized, and substantially increases the service life of bipolar plates using metal material.

Description

Bipolar plate of vanadium cell and preparation method thereof
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
With the profit of the regenerative resources such as the increasingly exhausted and corresponding environmental problem of traditional energy, wind energy, solar energy With causing people widely to pay close attention to and be rapidly developed, while in order to ensure the stable power-supplying of regenerative resource, overcome it solid Problematic, more and more electric power storage energy storage technologies are developed and used, wherein vanadium cell as extensive energy storage technology one Kind solution, also obtains remarkable progress in recent years.Wherein, bipolar plates be used to separate each monocell, while in circuit On by two adjacent sections cell communication, it is desirable to bipolar plates must have high conductivity and the stability in strong acid medium, together When can be attached between electrode material with relatively low contact resistance.Bipolar plates are moulded using carbon mostly in the prior art, its Mechanical strength is low, poorly conductive, and the contact resistance between battery component is larger, it is necessary to reduces the resistance of bipolar plates, improves The voltage efficiency of battery, 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 provide a kind of bipolar plate of vanadium cell and its preparation Method, solves in the prior art that its mechanical strength of bipolar plates is low, poorly conductive, in vertical direction poorly conductive, and with electricity The problems such as contact resistance of pond inter-module is larger.
To reach above-mentioned purpose, the technical scheme is that:
A kind of bipolar plate of vanadium cell, uses metal material the mode of thermal spraying to be selected, first in metal for framework material One layer of mixture being made of conducting powder and resin is sprayed in material both sides respectively, sprays one layer of conductive powder body after curing respectively in both sides, It is hot-forming on hot press again.
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, metal material are metallic plate or metal mesh, and thickness is in 0.5mm~30mm, material Matter is copper, steel, iron, titanium or silver.
In the mixture of the bipolar plate of vanadium cell, conducting powder and resin composition, the mass ratio of conducting powder and resin For (1:1)~(1:10).
The bipolar plate of vanadium cell, conducting powder are one kind in carbon black, graphite and carbon fiber powder;Resin is thermoplasticity Resin or thermosetting resin, thermoplastic resin is polypropylene, one kind in polyethylene, polyvinyl chloride, and thermosetting resin is phenolic aldehyde One kind in resin, epoxy resin.
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, positioned at outermost conductive powder body thickness in 0.02mm~0.10mm, conducting powder Mixture thickness with resin composition is in 0.5mm~30mm.
The bipolar plate of vanadium cell, the thickness of bipolar plate of vanadium cell is in 1.0mm~40mm.
The preparation method of the bipolar plate of vanadium cell, comprises the following steps that:
1) metallic plate or metal mesh are placed in incubator, temperature control is at 150~300 DEG C;
2) conducting powder and resin powder mixture are loaded in spray gun and metallic plate or metal mesh both sides work is got to by air pressure For casing play;
3) after casing play curing, one layer of conductive powder body is sprayed respectively in its 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 5~200min, 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 for preparing of the present invention using metal material as framework material, The mechanical strength of bipolar plates is substantially increased, under the effect of a variety of sealing means, performance is stablized, and substantially increases making for bipolar plates Use the service life.
2nd, bipolar plate of vanadium cell prepared by the present invention is using the processing method of thermal spraying and hot pressing, and technique is simple, equipment Cost is low.
3rd, the bipolar plate of vanadium cell framework material for preparing of the present invention is metal, by the use of conducting powder and resin as bonding agent, Superficies are pure conductive powder bodies, and due to the isotropism of metal material, overall electrical resistance is very small, substantially reduces bipolar Contact resistance between plate and battery component, improves the voltage efficiency of battery, and voltage efficiency can improve 3~5%.
Brief description of the drawings
Fig. 1 is the structure diagram of bipolar plate of vanadium cell.Wherein, 1 metallic plate or metal mesh;2 conducting powders and resin Mixture layer;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 metallic plate or metal mesh 1, conducting powder and resin mixing Nitride layer 2, conductive bisque 3, metallic plate or 1 both sides of metal mesh be followed successively by respectively conductive layer 2, conducting powder and resin mixture layer 2, Conductive bisque 3.
Embodiment 1
2mm steel plates are placed in incubator, temperature control is at 200 DEG C, by the graphite powder and grain that particle diameter is 0.02mm The polypropylene powder that footpath is 0.04mm presses 1:1 mass ratio, which is uniformly mixed, to be loaded in spray gun, and mixture is sprayed on steel plate both sides table On face, coating layer thickness 0.5mm, then particle diameter is sprayed in mixture layer both side surface for 0.02mm graphite powders, coating layer thickness is 0.05mm, then put it into mould and bipolar plate of vanadium cell is made after hot pressing on hot press, hot pressing temperature is 170 DEG C, heat The pressure time is 50min, 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 95.5%, voltage efficiency 86.5%, energy efficiency 82.6%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 5%.
Embodiment 2
1mm thickness copper mesh is placed in incubator, temperature control is at 250 DEG C, by the carbon powder and grain that particle diameter is 0.02mm The polypropylene powder that footpath is 0.05mm presses 1:2 mass ratio, which is uniformly mixed, to be loaded in spray gun, and mixture is sprayed on copper mesh both sides table On face, coating layer thickness 1.0mm, then particle diameter is sprayed in mixture layer both side surface for 0.02mm carbon powders, coating layer thickness is 0.1mm, then put it into mould and bipolar plate of vanadium cell is made after hot pressing on hot press, hot pressing temperature is 180 DEG C, hot pressing Time is 20min, 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 95.2%, voltage efficiency 85.5%, energy efficiency 81.4%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 4%.
Embodiment 3
1.5mm thickness copper coins are placed in incubator, temperature control is at 210 DEG C, by the carbon fiber powder that particle diameter is 0.10mm With particle diameter 1 is pressed for the polyethylene powder of 0.06mm:3 mass ratio, which is uniformly mixed, to be loaded in spray gun, and mixture is sprayed on copper coin two On side surface, coating layer thickness 0.9mm, then particle diameter is sprayed in mixture layer both side surface for 0.10mm carbon fiber powders, coating Thickness is 0.13mm, then puts it into mould and bipolar plate of vanadium cell, hot pressing temperature 150 is made after hot pressing on hot press DEG C, hot pressing time 30min, 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 96.0%, voltage efficiency 86.0%, energy efficiency 82.6%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 5%.
Embodiment 4
2mm thickness iron nets are placed in incubator, temperature control is at 200 DEG C, by the graphite powder and grain that particle diameter is 0.04mm The polypropylene powder that footpath is 0.05mm presses 1:4 mass ratio, which is uniformly mixed, to be loaded in spray gun, and mixture is sprayed on steel plate both sides table On face, coating layer thickness 1.2mm, then particle diameter is sprayed in mixture layer both side surface for 0.04mm graphite powders, coating layer thickness is 0.08mm, then put it into mould and bipolar plate of vanadium cell is made after hot pressing on hot press, hot pressing temperature is 180 DEG C, heat The pressure time is 25min, hot pressing pressure 24MPa.
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 85.8%, energy efficiency 82.3%, compared with existing carbon moulds bipolar plates, voltage efficiency improves 4.3%.

Claims (9)

  1. A kind of 1. bipolar plate of vanadium cell, it is characterised in that:Metal material is used to select the mode of thermal spraying for framework material, Spray one layer of mixture being made of conducting powder and resin respectively in metal material both sides first, spray one layer respectively in both sides after curing Conductive powder body, then on hot press it is hot-forming.
  2. 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. 3. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that:Metal material is metallic plate or metal Net, for thickness in 0.5mm~30mm, material is copper, steel, iron, titanium or silver.
  4. 4. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that:The mixture of conducting powder and resin composition In, the mass ratio of conducting powder and resin is (1:1)~(1:10).
  5. 5. according to the bipolar plate of vanadium cell described in claim 1 or 4, it is characterised in that:Conducting powder is carbon black, graphite and carbon are fine Tie up one kind in powder;Resin is thermoplastic resin or thermosetting resin, and thermoplastic resin is polypropylene, polyethylene, polyvinyl chloride In one kind, the one kind of thermosetting resin for phenolic resin, in epoxy resin.
  6. 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. 7. bipolar plate of vanadium cell described in accordance with the claim 1, it is characterised in that:Exist positioned at outermost conductive powder body thickness The mixture thickness of 0.02mm~0.10mm, conducting powder and resin composition is in 0.5mm~30mm.
  8. 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 1.0mm~40mm.
  9. 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) metallic plate or metal mesh are placed in incubator, temperature control is at 150~300 DEG C;
    2) metallic plate will be got to by air pressure in conducting powder and resin powder mixture loading spray gun or bone is used as in metal mesh both sides Rack-layer;
    3) after casing play curing, one layer of conductive powder body is sprayed respectively in its 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 5~200min, hot pressing pressure is 1~25MPa.
CN201610958797.5A 2016-11-03 2016-11-03 Bipolar plate for vanadium battery and preparation method thereof Expired - Fee Related CN108023106B (en)

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CN108023106B CN108023106B (en) 2020-07-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110289428A (en) * 2019-06-19 2019-09-27 北京科技大学 A kind of preparation of fuel cell stainless steel bi-polar plate and surface modifying method
CN110828841A (en) * 2019-11-19 2020-02-21 深圳市雄韬电源科技股份有限公司 Fuel cell bipolar plate and preparation method and used equipment thereof
CN111370719A (en) * 2020-03-19 2020-07-03 辽宁科京新材料科技有限公司 High-conductivity bipolar plate for flow battery and continuous processing device and method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102637881A (en) * 2012-04-11 2012-08-15 朝阳华鼎储能技术有限公司 Method for preparing electroconductive plastic bipolar plate for vanadium cell
CN102891324A (en) * 2012-09-25 2013-01-23 中国科学院金属研究所 Bipolar plate for vanadium battery and preparation method for bipolar plate
CN103633336A (en) * 2012-08-29 2014-03-12 中国科学院大连化学物理研究所 Bipolar plate for liquid flow energy storage battery and preparation method
US20140272571A1 (en) * 2013-03-15 2014-09-18 Physical Sciences, Inc. Electroactive Polymer Coating for Improved Battery Safety

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102637881A (en) * 2012-04-11 2012-08-15 朝阳华鼎储能技术有限公司 Method for preparing electroconductive plastic bipolar plate for vanadium cell
CN103633336A (en) * 2012-08-29 2014-03-12 中国科学院大连化学物理研究所 Bipolar plate for liquid flow energy storage battery and preparation method
CN102891324A (en) * 2012-09-25 2013-01-23 中国科学院金属研究所 Bipolar plate for vanadium battery and preparation method for bipolar plate
US20140272571A1 (en) * 2013-03-15 2014-09-18 Physical Sciences, Inc. Electroactive Polymer Coating for Improved Battery Safety

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110289428A (en) * 2019-06-19 2019-09-27 北京科技大学 A kind of preparation of fuel cell stainless steel bi-polar plate and surface modifying method
CN110828841A (en) * 2019-11-19 2020-02-21 深圳市雄韬电源科技股份有限公司 Fuel cell bipolar plate and preparation method and used equipment thereof
CN111370719A (en) * 2020-03-19 2020-07-03 辽宁科京新材料科技有限公司 High-conductivity bipolar plate for flow battery and continuous processing device and method thereof

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