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US 12,719,070 B2Granted
Fluorine-containing compound having sulfonic acid group and polymer electrolyte fuel cell
AssigneeNissan Chemical Corporation
InventorsTaichi Nakazawa, Takamasa Kikuchi
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Abstract
A compound that has good solubility in a polar solvent and when it is used as an electrolyte in a catalyst layer of a polymer electrolyte fuel cell, the polymer electrolyte fuel cell exhibits good power generation characteristics is disclosed. The compound has a structure represented by the following general formula (I) which contains at least one sulfonic acid group.
Claims16
A compound having a structure represented by the following general formula (I)
- wherein in the general formula (I), Ar1 is an aromatic structure optionally substituted by a sulfonic acid group(s),
- Ar2 is an aromatic structure optionally substituted by a sulfonic acid group(s),
- Ar3 is an aromatic structure optionally substituted by a sulfonic acid group(s),
- provided that when p=1, Ar2 is a benzene ring optionally substituted by a sulfonic acid group(s),
- R1 to R5 are each independently hydrogen, a sulfonic acid group or an aromatic group, and the aromatic groups are each independently and optionally substituted by a sulfonic acid group(s),
- one of R1 to R5 is hydrogen or a sulfonic acid group, and four are aromatic groups, one or more of the groups selected from the group consisting of Ar1, Ar2, and Ar3, R1, R2, R3, R4 and R5, when they are aromatic groups, and benzene ring A has one or more sulfonic acid groups,
- l and m are molar fractions when l+m=1.0, where 0<l≤1.0 and 0≤m<1.0, and when m is not 0, each constitutional unit is randomly copolymerized,
- “n”s are each independently an integer of 1 to 3, and
- p is 0 or 1.
6 more elements
A compound which is obtained by reacting a compound represented by the following general formula (pre-I) with a sulfonating agent
- wherein in the general formula (pre-I), Ar1′ is an aromatic structure,
- Ar2′ is an aromatic structure,
- Ar3′ is an aromatic structure,
- provided that when p=1, Ar2′ is a benzene ring,
- R1′ to R5′ are each independently hydrogen or an aromatic group,
- one of R1′ to R5′ is hydrogen, and four are aromatic groups,
- l and m are molar fractions when l+m=1.0, where 0<l≤1.0 and 0≤m<1.0, and when m is not 0, each constitutional unit is randomly copolymerized,
- “n”s are each independently an integer of 1 to 3, and
- p is 0 or 1.
6 more elements
Dependencies are inferred from the claim text.