Collector plate of vanadium redox battery and preparation method thereof

A liquid flow battery, vanadium oxidation technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of not particularly good mechanical properties and molding properties, low rigidity and strength of collectors, and unsmooth flow of electrolyte, etc. problems, to achieve the effect of easy sealing, high rigidity and strength, and simple assembly

Inactive Publication Date: 2010-06-02
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to literature reports, polyethylene, nylon, PP, polyvinyl fluoride, non-conductive polymers and isoelectric plastic plates have good electrical conductivity but mechanical Performance and formability are not particularly good
Therefore, at present, when using conductive plastic as a current collector at home and abroad, the conductive plastic is usually made into a flat plate shape. When it is applied to an all-vanadium redox flow battery, it is easy to cause the electrolyte to flow unsmoothly in the current collector. In the field, there are prone to "dead angles" where no electrolyte flows through, and the electrode polarization is serious
At the same time, the rigidity and strength of the current collector completely using conductive plastic are not large, and it is easy to deform, which makes it difficult to seal the all-vanadium redox flow battery, and the battery seeps seriously.

Method used

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  • Collector plate of vanadium redox battery and preparation method thereof
  • Collector plate of vanadium redox battery and preparation method thereof
  • Collector plate of vanadium redox battery and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0027] The preparation steps of the above-mentioned all-vanadium redox flow battery collector plate include: a. adding conductive fillers to thermoplastic polymers to prepare thermoplastic conductive plastic strips 1; thermoplastic polymers can be selected from polypropylene, low-density polyethylene, linear LDPE, HDPE, or thermoplastic elastomer polymers including styrene-butadiene-styrene copolymer, hydrogenated styrene-butadiene-styrene copolymer, styrene-isoprene ethylene-styrene copolymer, hydrogenated styrene-isoprene-styrene copolymer, ethylene-octene copolymer, rubber, etc.; conductive fillers can be made of conductive materials such as conductive acetylene carbon black, conductive carbon fiber, etc., and it is best to use Made of graphite.

[0028] b. Arrange and fix the conductive plastic strips 1 at intervals; when fixing, other auxiliary frames can be used to fix the conductive plastic strips 1 so that gaps are formed between adjacent conductive plastic strips 1 . ...

Embodiment 1

[0032] The conductive plastic plate after epoxy resin casting is used as the current collector, and several electrolyte flow field grooves 9 are formed on the current collector plate. The length of the conductive plastic strip 1 on the current collector plate is 130 mm, and the width is 10 mm. The liquid flow field groove 9 has a length of 130mm, a width of 3mm, and an outer edge width of the flow field of 5mm; the ratio of the ridge width to the groove width of the flow field is 1:0.3, and the ratio of the flow field groove depth to the groove width is 1:1. The current collector plate, electrode and separator were assembled into an all-vanadium redox flow battery, and the charge and discharge test was carried out. The average coulombic efficiency of 20 charge and discharge was 87.3%.

example 2

[0034] The conductive plastic plate after epoxy resin casting is used as the current collector, and several electrolyte flow field grooves 9 are formed on the current collector plate. The conductive plastic strip 1 on the current collector plate is 280mm long and 20mm wide. The liquid flow field groove 9 is 280mm long, 8mm wide, and the outer edge width of the flow field is 12mm; the ratio of the ridge width to the groove width of the flow field is 1:0.4, and the ratio of the flow field groove depth to the groove width is 1:2. The current collector plate was assembled with electrodes and separators to form an all-vanadium redox flow battery, and the charge-discharge test was carried out. The average coulombic efficiency of 20 charge-discharge cycles was 83.4%.

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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 [0001] The invention relates to a redox flow battery, in particular to a current collecting plate of an all-vanadium redox flow battery and a preparation method thereof. Background technique [0002] At present, as a new type of secondary battery, the all-vanadium redox flow battery (vanadium battery) has the advantages of fast charge and discharge speed, good deep discharge performance, long cycle life, and environmental protection compared with other batteries. There are broad application prospects in areas such as energy storage power supplies for solar power generation, energy storage systems in remote areas, peak shaving in power plants (power stations), uninterruptible power supplies (UPS) or emergency power systems (EPS). [0003] The main factors affecting the performance of the all-vanadium redox flow battery are membrane, electrolyte and electrode materials. The batteries 7 are stacked in parallel in order, and its structure is as follows Figure 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 李道玉张波吴建国罗冬梅冉洪波毛凤娇
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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