Method for manufacturing a sulfonated poly(1,3,4-oxadiazol) polymer

A technology of polymer and oxadiazole, applied in the field of preparing sulfonated polypolymer, can solve the problems of high cost and reduced proton conductivity, and achieve the effects of good mechanical properties and high proton conductivity
CN101333291AInactive Publication Date: 2008-12-31GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH
Publication Date
2008-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing sulfonic poly(1,3,4-oxadiazole)polymer, also relates to the sulfonic poly(1,3,4-oxadiazole)polymer used for fuel cell membranes, fuel cells and a method for producing the fuel cell. The method includes steps: mixing hydrazine sulfate with one or more dicarboxylic acids or derivatives thereof in polyphosphoric acid to prepare a solution, heating the solution in inert atmosphere, settling the polymer in an alkali solution.
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Description

technical field

[0001] The present invention relates to a process for preparing sulfonated poly(1,3,4-oxadiazole) polymers. The invention also relates to sulfonated poly(1,3,4-oxadiazole) polymers, membranes for fuel cells, fuel cells and methods for preparing fuel cells. Background technique

[0002] Fuel cells require proton-conducting membranes. Such a membrane is, for example, a polymer electrolyte membrane (PEM). A known PEM based on a perfluorocarbon polymer electrolyte membrane is the Nafion membrane developed by DuPont (JP 112 04 119 A).

[0003] There are two types of PEM fuel cells under development, low temperature cells, which operate at temperatures up to about 90°C, and high temperature cells, which operate at temperatures up to about 180°C.

[0004] Nafion membranes do not have sufficient heat resistance so that the membranes cannot be used at temperatures exceeding 80° C. (see also US 4 330 654). Low temperature fuel cells are sensitive to carbon monoxide...

Claims

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