Sulfonic acid group-containing, proton-conducting polymer composition, a solid electrolyte membrane and a solid polymer fuel cell
AssigneeFujitsu Limited
InventorsNawalage Florence Cooray, Fumio Takei, Norio Sawatari, Masao Tomoi
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Abstract
A solid electrolyte membrane for solid polymer fuel cells, or the like is provided that is chemically stable in a strong acid atmosphere, and has low methanol cross-over as well as high proton conductivity. The solid electrolyte membrane is manufactured, using an electrolyte composition comprising a sulfonic acid group-containing polymer having a specific triazine structure. This polymer can be synthesized, for example, from a sulfonic acid group-containing dihydroxy compound having a triazine structure, and a difluoride.
Claims26
An electrolyte composition comprising a sulfonic acid group-containing polymer having at least one structure unit selected from the group consisting of a structure unit represented by formula (1), a structure unit represented by formula (2), a structure unit represented by formula (3), and a structure unit represented by formula (4),
- (in formulae (1)-(4), Y is, independently for each formula, O, S or a direct bond;
- R is, independently for each formula, a group having at least either one of an unsaturated bond and an epoxy bond;
- Ar1 is, independently for each formula, a sulfonic acid group-containing monovalent aromatic ring that may comprise fluorine or a fluorine-containing substituent group;
- Ar2 is, independently for each formula and from each other in each formula, a divalent aromatic ring that may comprise fluorine or a fluorine-containing substituent group;
- A3 is, independently for each formula, a divalent group comprising an aromatic ring that may comprise fluorine or a fluorine-containing substituent group;
- Ar4 is, independently for each formula, a divalent group comprising a sulfonic acid group-containing aromatic ring that may comprise fluorine or a fluorine-containing substituent group;
- and Ar5 is a phenylene group that may have 1 to 4 fluorine atoms as substituents).
Dependencies are inferred from the claim text.