A making method for liquid battery compound conductive plastic current collector body

A composite conductive and liquid flow battery technology, which is applied to battery electrodes, fuel cell parts, electrode carriers/collectors, etc., can solve the problems of improved electrical performance, complex composition, and increased costs, achieving low cost and good electrical conductivity sexual effect

Inactive Publication Date: 2008-03-26
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its composition is relatively complex, its volume resistivity is lower than 0.1 ohm cm, and can reach 0.8 ohm cm, and its conductivity needs to be further improved
In foreign countries, polyvinyl fluoride suspension powder (mainly vinylidene fluoride) is used as the matrix, graphite is used as conductive filler, and current collectors in zinc-bromine batteries and fuel cells are produced by mixing, rolling and molding processes, but this The patent requires a temperature of 800°C to process graphite, which increases the cost and its electrical properties need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Under normal temperature and pressure, mix 55.6% of 60% polytetrafluoroethylene suspension, 22.4% graphite, 22.4% carbon black and appropriate amount of distilled water according to the weight ratio, dehydrate, dry, soak in isopropanol; Under the condition of 75°C, the diaphragm is made by repeated rolling; the diaphragm is cut, and the two cut diaphragms are cut at 400Kg / cm 2 Under pressure conditions, press molding; put the molded sample into a special fixture, put it into a high-temperature furnace at 390°C together with the fixture, and sinter for 30 minutes; take out the fixture, cool naturally, and obtain a current collector with a volume resistivity of 0.3361 ohm· cm.

Embodiment 2

[0027] The formulation and process conditions are the same as in Example 1, except that a layer of silver-plated non-woven copper mesh is added during pressing, so that the volume resistivity of the current collector is 0.02992 ohm·cm.

Embodiment 3

[0029] The formulation and process conditions are the same as in Example 1, except that a layer of non-woven copper mesh is added during pressing, so that the volume resistivity of the current collector is 0.02826 ohm·cm.

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PUM

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Abstract

This invention provides a preparing method for composite conductive plastic collectors of fluid flow cells, which puts one or several kinds of conductive matrials of conductive filling graphite, carbon black, ethyne black and carbon fiber powder into teflon suspension and mixing them uniformly and drying them then soaking them with IPA and milling them repeatedly under 70-80deg.C to get a diaphragm, which is cut to a necessary size, then single, multiple or conduction net is pressed into mold under 400Kg / cm2 according to the needs and is put into a special clamp and a high temperature oven for sintering, then cooled to get the conductive plastic collector.

Description

technical field [0001] The invention relates to the technical field of flow batteries, in particular to a method for preparing a composite conductive plastic current collector of a flow battery. Background technique [0002] The current collector of vanadium redox flow battery generally uses graphite plate, which has good charge and discharge performance and can withstand high current density charge and discharge, and its charge and discharge current density can reach 128mA / cm 2 , but the graphite plate current collector has leakage, and there is slight corrosion during use. Especially under the condition of overcharging, the graphite current collector is easily oxidized, and the graphite plate is expensive and brittle. These defects seriously affect the vanadium Performance indicators such as the service life of the flow battery, manufacturing cost, and battery performance. [0003] In order to solve the above problems, domestic Panzhihua Iron and Steel Research Institute ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M8/02H01M4/88H01M8/0202
CPCY02E60/12Y02E60/50Y02E60/10
Inventor 陈茂斌刘效疆孟凡明李小兵刘联
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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