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Polyelectrolyte membranes derived from soluble perfluorocyclobutane polymers with sulfonyl chloride groups

A technology of polymer membranes and basic polymers, applied in circuits, fuel cells, electrical components, etc., can solve the problems of lack of mechanical strength of random copolymer membranes

Active Publication Date: 2011-11-23
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chain configuration of random copolymers, water swelling at high humidity and film shrinkage at low humidity are common problems with random copolymers
Random copolymer membranes lack the mechanical strength to withstand the rigors of hydration and dehydration in a working fuel cell

Method used

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  • Polyelectrolyte membranes derived from soluble perfluorocyclobutane polymers with sulfonyl chloride groups
  • Polyelectrolyte membranes derived from soluble perfluorocyclobutane polymers with sulfonyl chloride groups
  • Polyelectrolyte membranes derived from soluble perfluorocyclobutane polymers with sulfonyl chloride groups

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Embodiment Construction

[0116] Presently preferred compositions, embodiments and methods of the invention are now referred to in detail, which constitute the best modes presently known to the inventors for carrying out the invention. The drawings are not necessarily drawn to scale. It is to be understood, however, that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various and alternative forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for any aspect of the invention and / or as a representative basis for teaching one skilled in the art to variously employ the invention .

[0117]Except in the examples or where expressly indicated otherwise, all numerical quantities in this specification indicating amounts of materials or conditions of reaction and / or conditions of use are to be understood as modified by the word "about" to describe the broadest scope of the invention . It is ge...

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Abstract

A method of forming an ionomeric membrane includes a step of reacting a first polymer in chlorosulfonic acid to form a first precipitate. The first precipitate comprising a polymer including a polymer unit having at least one -SO2Cl moiety attached thereto and includes a step of dissolving the first precipitate in a polar aprotic solvent to form the first solution. A polymeric membrane is then formed from the first solution such that the membrane includes the polymer unit having at least one -SO2Cl. The polymer including a polymer unit a polymer unit having at least one -SO2Cl is then reactedwith a nucleophilic compound to form the polymeric membrane.

Description

technical field [0001] The present invention relates to ion conducting polymers, fuel cell membranes and membrane electrode assemblies. Background technique [0002] In fuel cell devices, proton-conducting polymer membranes are important components. For optimal fuel cell performance, proton-conducting polymer membranes must maintain high ionic conductivity and mechanical stability at high and low relative humidity. Aromatic perfluorocyclobutane random copolymers have been disclosed in US Patent 6,559,237 as improved membrane materials for fuel cells. However, due to the chain configuration of random copolymers, water swelling at high humidity and film shrinkage at low humidity are common problems of random copolymers. Random copolymer membranes lack the mechanical strength to withstand the rigors of hydration and dehydration within a working fuel cell. [0003] Accordingly, there is a need to provide further improved proton-conducting polymer membranes that maintain robus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L53/00C08L27/16C08F8/38C08F8/34H01M8/02H01M2/16H01M4/86
CPCY02E60/521C08J5/2262C08F214/18H01M8/1025C08J2371/12Y02E60/50
Inventor T·J·富勒S·M·麦金农M·R·谢内维斯
Owner GM GLOBAL TECH OPERATIONS LLC