Anion exchange electrolyte membrane, membrane-electrode assembly for fuel cell including the same, and fuel cell including the same

Patent metadata

Field	Value
Publication number	US-9692072-B2
Application number	US-201515306621-A
Country	US
Kind code	B2
Filing date	Jun 3, 2015
Priority date	Jun 13, 2014
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Disclosed is an anion exchange electrolyte membrane including: a base polymer having a polar group; and a graft chain having a specific structural unit. The graft chain is, for example, a polymer chain that is formed from diallyldimethylammonium chloride as a monomer.

First claim

The invention claimed is:

1. An anion exchange electrolyte membrane comprising:
a base polymer comprising a polar group; and
a graft chain comprising a structural unit represented by the following formula (1) or (2):

where R 1 to R 6 are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, a structure A 1 that forms a ring structure together with a nitrogen atom bonded thereto is a saturated carbon chain having 3 to 7 carbon atoms or a structure in which at least one of the carbon atoms of the saturated carbon chain is substituted by a hetero atom, and X 1 and X 2 are each independently a halide ion, a hydroxide ion, or an organic or inorganic acid anion.

2. The anion exchange electrolyte membrane according to claim 1 , wherein the graft chain further comprises a structure derived from a monomer represented by any one of the following formulae (3) to (7):

where R 7 to R 12 and R 15 to R 21 are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R 13 and R 14 are each independently an alkylene group having 1 to 3 carbon atoms, a total number of the carbon atoms in R 13 and the carbon atoms in R 14 is in a range of 2 to 6, X 3 to X 5 are each independently a halide ion, a hydroxide ion, or an organic or inorganic acid anion, and Y is any one of structures given in the following formula (8):

where R 22 and R 23 are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and X 6 is a halide ion, a hydroxide ion, or an organic or inorganic acid anion.

3. The anion exchange electrolyte membrane according to claim 1 , wherein the polar group is at least one selected from the group consisting of a hydroxyl group, a carboxyl group, an ester group, an ether group, an amide group, and an amino group.

4. The anion exchange electrolyte membrane according to claim 1 , wherein the base polymer comprises at least one selected from the group consisting of polycarbonate resins, polyester resins, cellulose-based resins, polyvinyl acetal resins, polyamide resins, (meth)acrylic resins, urea resins, phenol resins, melamine resins, epoxy resins, acetal resins, polyvinyl acetate resins, polyvinyl alcohol resins, ethylene-vinyl alcohol copolymers, hydrophilized polyolefin resins, and hydrophilized polystyrene resins.

5. A membrane-electrode assembly for an anion exchange membrane fuel cell, comprising the anion exchange electrolyte membrane according to claim 1 .

6. An anion exchange membrane fuel cell comprising the membrane-electrode assembly for an anion exchange membrane fuel cell according to claim 5 .

Assignees

• Nitto Denko Corp

Inventors

• Suzuki Takashi
• Yamamoto Mizuki
• Nishii Hiroyuki

Classifications

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• H01B13/00

  Apparatus or processes specially adapted for manufacturing conductors or cables · CPC title

• H01M8/1025 Primary

  having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters · CPC title

• H01B1/122

  Ionic conductors · CPC title

• H01M8/02

  Details (electrodes H01M4/86 - H01M4/98) · CPC title