CN101719550A - Collector plate of vanadium redox battery and preparation method thereof - Google Patents
Collector plate of vanadium redox battery and preparation method thereof Download PDFInfo
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- CN101719550A CN101719550A CN200910310338A CN200910310338A CN101719550A CN 101719550 A CN101719550 A CN 101719550A CN 200910310338 A CN200910310338 A CN 200910310338A CN 200910310338 A CN200910310338 A CN 200910310338A CN 101719550 A CN101719550 A CN 101719550A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/30—Hydrogen technology
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Abstract
The invention discloses a collector plate of a vanadium redox battery and a preparation method thereof, and the collector plate of the vanadium redox battery has the characteristic of improving the charging and discharging performances; the collector plate of the vanadium redox battery comprises an electricity-conduction plastic body which is formed by distributing a plurality of electricity-conduction plastic strips at interval, a flow field plate is arranged between the two adjacent electricity-conduction plastic strips, and the height of the electricity-conduction plastic strips and the height of the flow field plate are unequal to form an electrolyte solution groove; the preparation method is that: a. electricity-conduction fillers are added in a thermoplasticity polymer to obtain thermoplasticity electricity-conduction plastic strips; b. the electricity-conduction plastic strips are arranged and fixed at interval; c. epoxide resin or phenolic resin for forming the flow field plate is cast among the electricity-conduction plastic strips; d. solidification. When the electrolyte solution flows in the electrolyte solution groove, the flowing is unobstructed, and the battery polarization is low; the vanadium redox battery arranged in the collector plate has good charging and discharging performances, thereby being popularized and applied to the vanadium redox battery.
Description
Technical field
The present invention relates to redox flow batteries, be specifically related to collector plate of a kind of vanadium redox battery and preparation method thereof.
Background technology
At present, vanadium redox battery (vanadium cell) is as a kind of novel secondary cell, compare with other storage batterys, have that the speed of discharging and recharging is fast, the deep discharge performance is good, have extended cycle life, advantage such as environmental protection, all have application prospects in accumulation power supply and outlying district energy-storage system, power plant (power station) peak regulation, uninterrupted power supply (ups) Unity or the emergency power system fields such as (EPS) of wind energy and solar power generation.
The principal element that influences the vanadium redox battery performance has film, electrolyte and electrode material etc., vanadium redox battery is formed a complete battery 7 by end collector plate 3, electrode 4, barrier film 5, two collector plate 6, and be docile and obedient that preface is parallel to stack, its structure as shown in Figure 4, end collector plate 3 only medial surface has the flow field, lateral surface is compounded with copper sheet 8, and all there is the flow field two sides of two collector plate 6.At present the electrode material that uses mainly comprises non-metal kind electrodes such as metal species electrode such as gold, titanium, lead, titanium base platinum and yttrium oxide and carbon element, graphite.Result of study shows that the cost of metal species electrode is too high, and passivation takes place easily in the long-term back of using, and reduces battery performance; And the etching phenomenon of non-metal kind unitary electrode is serious.The conductive polymer combination electrode is the vanadium redox battery electrode that a kind of novel chemical property well is difficult for etching again.It is by adding another conductive filler or conducting polymer in the macromolecular material, obtain the multiple material of conductive polymer, and is compound with collector such as graphite felt then.Not only have conducting function, and can keep the characteristic of macromolecular material, can regulate the electricity and the mechanical property of material in the larger context.
According to the literature, though usefulness polyethylene such as the Unisearch Ltd of Haddadi-Asl, New South Wales,Australia, Central South University, nylon, PP, polyvinyl fluoride, property polymer and etc. electric plastic plate good electrical conductivity mechanical performance and processability are arranged is not good especially.Therefore, when using conductive plastics, usually conductive plastics is made plate shaped at present both at home and abroad as collector, cause electrolyte mobile having some setbacks in collector plate in the time of in being applied to vanadium redox battery easily, occur " dead angle " of no electrolyte stream warp in the whole flow field easily, electrode polarization is serious.Use simultaneously the rigidity and little, the easy deformation of intensity of the afflux utmost point of conductive plastics fully, cause vanadium redox battery to be difficult to sealing, the battery sepage is serious.
Summary of the invention
Technical problem solved by the invention provides collector plate of a kind of vanadium redox battery that improves charge-discharge performance and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: the collector plate of vanadium redox battery, comprise the conductive plastics body, described conductive plastics body is arranged at interval by many conductive plastics bars and is formed, between adjacent two conductive plastics bars flow-field plate is set, the height of described conductive plastics bar and the height of flow-field plate do not wait and form electrolyte flow field groove.
As optimal technical scheme, the height of conductive plastics bar is greater than the height of flow-field plate.
Further be that wide and ratio furrow width of the ridge of described electrolyte flow field groove is 1: 0.3～1: 0.5.
Further be that the ditch depth of described electrolyte flow field groove and the ratio of furrow width are 1: 0.5～1: 2.
The preparation method of the collector plate of vanadium redox battery, its step comprises:
A, conductive filler joined prepare thermoplastic conductive plastics bar in the thermoplastic polymer;
B, the conductive plastics bar arranged at interval and fixing;
C, cast forms the macromolecular material of flow-field plate between the conductive plastics bar;
D, curing.
Further be that the macromolecular material described in the step c is epoxy resin or phenolic resins.
Further be that the conductive filler among the step a adopts graphite to make.
The invention has the beneficial effects as follows: between the conductive plastics bar flow-field plate is set, makes that the rigidity of whole collector plate and intensity are big, not yielding, the vanadium redox battery of making of this afflux collection seals easily; Simultaneously, its assembling is simple, can not take place collector plate that pure conductive plastics makes when assembling because of the inhomogeneous phenomenon that crackle occurs of equipment pressure control, can effectively prevent to leak in the electrolyte and leak.And the height of the height of conductive plastics bar and flow-field plate is set to not wait, make the electrolyte flow field groove that formation is flow through electrolyte between conductive plastics bar and flow-field plate, when then electrolyte flowed in this groove, electrolyte flowed unobstructed in the collector plate flow field, and battery polarization is little; Collector plate resistance is little, stable chemical performance, and the vanadium redox battery charge-discharge performance of installing with this collector plate is good, is adapted at applying in the vanadium redox battery.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is end collector plate A-A direction cutaway view in Fig. 1;
Fig. 3 is two collector plate A-A direction cutaway views in Fig. 1;
Fig. 4 is the structural plan of whole vanadium redox battery.
Be labeled as among the figure: conductive plastics bar 1, flow-field plate 2, end collector plate 3, electrode 4, barrier film 5, two collector plate 6, battery 7, copper sheet 8, electrolyte flow field groove 9.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, the collector plate of vanadium redox battery of the present invention, comprise the conductive plastics body, described conductive plastics body is arranged at interval by many conductive plastics bars 1 and is formed, between adjacent two conductive plastics bars 1 flow-field plate 2 is set, the height of the height of described conductive plastics bar 1 and flow-field plate 2 does not wait and forms electrolyte flow field groove 9.Flow-field plate 2 is set between conductive plastics bar 1, makes that the rigidity of whole collector plate and intensity are big, not yielding, the vanadium redox battery of making of this afflux collection seals easily; Simultaneously, its assembling is simple, can not take place collector plate that pure conductive plastics makes when assembling because of the inhomogeneous phenomenon that crackle occurs of equipment pressure control, can effectively prevent to leak in the electrolyte and leak.And the height of the height of conductive plastics bar 1 and flow-field plate 2 is set to not wait, make the electrolyte flow field groove 9 that formation is flow through electrolyte between conductive plastics bar 1 and flow-field plate 2, when then electrolyte flowed in this groove, electrolyte flowed unobstructed in the collector plate flow field, and battery polarization is little; Collector plate resistance is little, stable chemical performance, and the vanadium redox battery charge-discharge performance of installing with this collector plate is good.
In the above-described embodiment, the form that the height of the height of conductive plastics bar 1 and flow-field plate 2 does not wait can be the height of the height of flow-field plate 2 greater than conductive plastics bar 1, also can be the height of the height of conductive plastics bar 1 greater than flow-field plate 2.The height of preferred conductive plastics bar 1 can be beneficial to electrolyte flowing in electrolyte flow field groove 9 greater than the height of flow-field plate 2, reduces flow resistance.
For the charge-discharge performance that makes vanadium redox battery reaches best, wide and ratio furrow width of the ridge of described electrolyte flow field groove 9 is 1: 0.3～1: 0.5; The ratio of ditch depth and furrow width is 1: 0.5～1: 2.
The preparation process of above-mentioned vanadium redox battery collector plate comprises: a, conductive filler joined prepare thermoplastic conductive plastics bar 1 in the thermoplastic polymer; Thermoplastic polymer can be selected polypropylene, low density polyethylene (LDPE), LLDPE, high density polyethylene (HDPE) for use, or the employing thermoplastic elastomer polymer, comprise s-B-S copolymer, hydrogenated styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer-, hydrogenated styrene-isoprene-styrol copolymer, ethylene-octene copolymer, rubber etc.; Conductive filler can select for use electric conducting materials such as conductive acetylene carbon black, conductive carbon fibre to make, and preferably adopts graphite to make.
B, conductive plastics bar 1 arranged at interval and fixing; Fixedly the time, can adopt other auxiliary frame that conductive plastics bar 1 is fixing, make between adjacent conductive plastic strip 1, to form the gap.
C, cast forms the macromolecular material of flow-field plate 2 between conductive plastics bar 1; The optional usefulness of this macromolecular material is aqueous at normal temperatures, and normal temperature can solidify, the macromolecular material that the product after the curing can anti-strong acid corrosion all can, preferably adopt epoxy resin or phenolic resins.
D, curing.Epoxy resin or phenolic resins are poured between the conductive plastics bar 1 and after solidifying, can strengthen the strength and stiffness of whole collector plate; And the flow-field plate 2 that electrolyte forms from epoxy resin or phenolic resins by the time, its resistance is less, electrolyte flow is unobstructed, battery polarization is little.
Embodiment 1:
Do the afflux utmost point with the conductive plastic plate after the epoxy resin casting, form several electrolyte flow field grooves 9 on collector plate, conductive plastics bar 1 length is 130mm on the collector plate, wide is 10mm, the electrolyte flow field groove 9 long 130mm of being that form, wide is 3mm, the flow field outer rim is wide to be 5mm; Ridge wide ratio with furrow width in flow field is 1: 0.3, and the flow field ditch depth is 1: 1 with the ratio of furrow width.This collector plate and electrode and barrier film are assembled into vanadium redox battery, carry out charge-discharge test, its 20 times discharge and recharge average coulombic efficiency is 87.3%.
Example 2:
Do the afflux utmost point with the conductive plastic plate after the epoxy resin casting, form several electrolyte flow field grooves 9 on collector plate, conductive plastics bar 1 length is 280mm on the collector plate, wide is 20mm, the electrolyte flow field groove 9 long 280mm of being that form, wide is 8mm, the flow field outer rim is wide to be 12mm; Ridge wide ratio with furrow width in flow field is 1: 0.4, and the flow field ditch depth is 1: 2 with the ratio of furrow width.This collector plate and electrode and barrier film are assembled into vanadium redox battery, carry out charge-discharge test, its 20 times discharge and recharge average coulombic efficiency is 83.4%.
Example 3:
Conductive plastic plate with the phenolic resins casting is done the afflux utmost point, forms several electrolyte flow field grooves 9, the long 450mm of conductive plastics bar on the collector plate on collector plate, wide is 30mm, the electrolyte flow field groove 9 long 450mm of being that form, wide is 15mm, the flow field outer rim is wide to be 20mm; Ridge wide ratio with furrow width in flow field is 1: 0.5, and the flow field ditch depth is 1: 0.5 with the ratio of furrow width.This collector plate and electrode and barrier film are assembled into vanadium redox battery, carry out charge-discharge test, its 20 times discharge and recharge average coulombic efficiency is 80.1%.
Claims (7)
1. the collector plate of vanadium redox battery, comprise the conductive plastics body, it is characterized in that: described conductive plastics body is arranged at interval by many conductive plastics bars (1) and is formed, flow-field plate (2) is set between adjacent two conductive plastics bars (1), and the height of the height of described conductive plastics bar (1) and flow-field plate (2) does not wait and forms electrolyte flow field groove (9).
2. the collector plate of vanadium redox battery as claimed in claim 1, it is characterized in that: the height of conductive plastics bar (1) is greater than the height of flow-field plate (2).
3. the collector plate of vanadium redox battery as claimed in claim 1 or 2 is characterized in that: wide and ratio furrow width of the ridge of described electrolyte flow field groove (9) is 1: 0.3～1: 0.5.
4. the collector plate of vanadium redox battery as claimed in claim 3, it is characterized in that: the ditch depth of described electrolyte flow field groove (9) and the ratio of furrow width are 1: 0.5～1: 2.
5. the preparation method of the collector plate of vanadium redox battery, its step comprises:
A, conductive filler joined prepare thermoplastic conductive plastics bar (1) in the thermoplastic polymer;
B, conductive plastics bar (1) arranged at interval and fixing;
C, cast forms the macromolecular material of flow-field plate (2) between conductive plastics bar (1);
D, curing.
6. the collector plate of vanadium redox battery as claimed in claim 5, it is characterized in that: the macromolecular material described in the step c is epoxy resin or phenolic resins.
7. the collector plate of vanadium redox battery as claimed in claim 6 is characterized in that: the conductive filler employing graphite making among the step a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310338A CN101719550A (en) | 2009-11-24 | 2009-11-24 | Collector plate of vanadium redox battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910310338A CN101719550A (en) | 2009-11-24 | 2009-11-24 | Collector plate of vanadium redox battery and preparation method thereof |
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| CN101719550A true CN101719550A (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910310338A Pending CN101719550A (en) | 2009-11-24 | 2009-11-24 | Collector plate of vanadium redox battery and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094600A (en) * | 2013-01-31 | 2013-05-08 | 中国东方电气集团有限公司 | Flow half-cell and flow cell stack with same |
| CN111370721A (en) * | 2020-03-19 | 2020-07-03 | 辽宁科京新材料科技有限公司 | Bipolar plate for flow battery |
| CN116505049A (en) * | 2023-06-27 | 2023-07-28 | 杭州德海艾科能源科技有限公司 | Integrated battery cell for flow battery and manufacturing method thereof |
-
2009
- 2009-11-24 CN CN200910310338A patent/CN101719550A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094600A (en) * | 2013-01-31 | 2013-05-08 | 中国东方电气集团有限公司 | Flow half-cell and flow cell stack with same |
| CN111370721A (en) * | 2020-03-19 | 2020-07-03 | 辽宁科京新材料科技有限公司 | Bipolar plate for flow battery |
| CN116505049A (en) * | 2023-06-27 | 2023-07-28 | 杭州德海艾科能源科技有限公司 | Integrated battery cell for flow battery and manufacturing method thereof |
| CN116505049B (en) * | 2023-06-27 | 2023-09-12 | 杭州德海艾科能源科技有限公司 | Integrated battery cell for flow battery and manufacturing method thereof |
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Application publication date: 20100602 |