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Bipolar plate for electric pile, application and fuel electric pile

A technology of bipolar plates and electric stacks, which is applied to fuel cells, fuel cell components, circuits, etc., can solve problems such as harmful performance of fuel cells, achieve the effects of ensuring stability and solving electrolyte loss

Pending Publication Date: 2021-05-18
坤艾新材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ambient water vapor entering the battery pack may dilute the battery electrolyte and be detrimental to fuel cell performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Under a nitrogen atmosphere, polyethersulfone (Ultrason S, product of BASF) was heated and dissolved in N-methyl-2-pyrrolidone. In the resulting solution, the polyethersulfone content can be adjusted to 15-25%. The resulting solution was coated on the surrounding edges and the outer edge of the bipolar plate, and then the solvent was removed at 120 degrees Celsius under a nitrogen atmosphere to form a sealed structure with a thickness of 12 microns. A battery pack was composed of the prepared bipolar plates and BASFCeltec-P membrane electrodes, operated at 180 degrees Celsius, with a constant current of 0.2 ampere / square centimeter.

Embodiment 2

[0037] The polyethersulfone (Ultrason S, product of BASF) / N-methyl-2-pyrrolidone in Example 1 was used. The solution is coated on the periphery of the bipolar plate of the installed battery pack, and then the solvent is removed at 120 degrees Celsius under a nitrogen atmosphere to form a sealed structure with a thickness of 25 microns. The battery pack operates at 195 degrees Celsius with a constant current of 0.2 A / cm2.

Embodiment 3

[0041] Mix 100 grams of bisphenol A epoxy resin and 16 grams of triethanolamine evenly, quickly and evenly spread it on the surrounding edges and outer edges of the bipolar plate, and then cure at room temperature for 3 hours to form a sealed structure with a thickness of 12.5 microns. A battery pack was composed of the prepared bipolar plates and BASF Celtec-P membrane electrodes, operated at 210 degrees Celsius, with a constant current of 0.2 ampere / square centimeter.

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Abstract

The invention provides a bipolar plate for an electric pile. The bipolar plate comprises: a bipolar plate body; and a sealing structure, wherein material of the sealing structure comprises thermostable and phosphoric acid stable polymers, and the bipolar plate body is at least partially coated with the sealing structure. According to the bipolar plate, the loss of phosphoric acid electrolyte and water can be reduced, so that the battery performance stability of fuel is ensured.

Description

technical field [0001] The application relates to the field of fuel cells, in particular to a bipolar plate for a fuel cell stack and its application, and a fuel cell stack. Background technique [0002] The demand for clean electricity from non-fossil fuels has increased dramatically in recent years. This demand centers on a number of technologies, including systems that use proton-conducting polymer electrolyte membrane cells to fuel electricity and heat with hydrogen, such as proton exchange membrane fuel cells. At present, proton exchange membrane fuel cells are generally divided into two categories: low temperature proton exchange membrane (60-80°C) and high temperature proton exchange membrane (120-160°C). So-called low-temperature proton exchange membrane (PEM) batteries use water as the electrolyte and use fluoropolymers containing covalently bonded sulfonic acid groups. Dupont's membrane and Dow Aciplex- The membrane is an example of a commercial membrane. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0284H01M8/0286H01M8/2457
CPCH01M8/02H01M8/2465H01M8/0276Y02E60/50
Inventor 肖丽香陈春华陈世明陈爽赵国庆杨旗王珉
Owner 坤艾新材料科技(上海)有限公司
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