Anion-exchange membrane, and electrochemical element and electrochemical device having same

Patent metadata

Field	Value
Publication number	US-2018050336-A1
Application number	US-201615556957-A
Country	US
Kind code	A1
Filing date	Mar 11, 2016
Priority date	Mar 13, 2015
Publication date	Feb 22, 2018
Grant date	—

Abstract

Provided is an anion-exchange membrane including: a substrate composed of a film of ultrahigh molecular weight polyolefin; and a graft chain having the following structural unit.

L 1 to L 5 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkanol group having 1 to 4 carbon atoms, or a specific functional group including an anion-exchange group, and an example of the functional group is —Z 2 -M 1 -Z 1 (R 1 )(R 2 )(R 3 ). R 1 to R 3 are directly bonded to Z 1 and are each independently an alkyl group having 1 to 8 carbon atoms or an alkanol group having 1 to 8 carbon atoms. M 1 is a linear hydrocarbon chain having 3 to 8 carbon atoms, Z 1 is a nitrogen atom or a phosphorus atom, and Z 2 is a nitrogen atom bonded to one hydrogen atom, an oxygen atom, or a sulfur atom. L 6 is a hydrogen atom, a methyl group, or an ethyl group.

First claim

1 . An anion-exchange membrane comprising: a substrate composed of a film of ultrahigh molecular weight polyolefin; and a graft chain having a structural unit represented by the following formula (1):

wherein
in the formula (1),
L 1 to L 5 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkanol group having 1 to 4 carbon atoms, or a structure represented by the following formula (2-1) or (2-2):

at least one of L 1 to L 5 is a structure represented by the formula (2-1) or (2-2), and
L 6 is a hydrogen atom, a methyl group, or an ethyl group, and
in the formulae (2-1) and (2-2),
R 1 to R 3 , R 11 to R 13 , and R 21 to R 23 are each independently an alkyl group having 1 to 8 carbon atoms or an alkanol group having 1 to 8 carbon atoms,
M 1 , M 11 , and M 21 are each independently a linear hydrocarbon chain having 3 to 8 carbon atoms,
the hydrocarbon chain optionally has a substituent replacing a hydrogen atom bonded to a carbon atom of the hydrocarbon chain,
the substituent is at least one selected from the group consisting of a halogen atom or an alkyl group having 1 to 5 carbon atoms,
Z 1 , Z 11 , and Z 21 are each independently a nitrogen atom or a phosphorus atom,
Z 2 is a nitrogen atom bonded to one hydrogen atom, an oxygen atom, or a sulfur atom, and
Z 12 is a nitrogen atom.

2 . The anion-exchange membrane according to claim 1 , wherein
the substrate is an unstretched film, and the anion-exchange membrane has a dry thickness of 100 μm or less.

3 . The anion-exchange membrane according to claim 1 , wherein
L 1 to L 5 are each independently a hydrogen atom or a structure represented by the formula (2-1), any one of L 1 to L 5 is a structure represented by the formula (2-1), L 6 is a hydrogen atom, M 1 is an alkylene group having 3 to 6 carbon atoms, Z 1 is a nitrogen atom, and Z 2 is an oxygen atom.

4 . An electrochemical element comprising the anion-exchange membrane according to claim 1 .

5 . An electrochemical device comprising the electrochemical element according to claim 4 .

Assignees

• Nitto Denko Corp

Inventors

• Matsuda Koso
• Suzuki Takashi
• Nakano Takeshi
• Nishii Hiroyuki

Classifications

• B01J41/14

  obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title

• H01M8/106

  characterised by the chemical composition of the porous support · CPC title

• C08J7/18

  using wave energy or particle radiation · CPC title

• H01M8/1039

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title

• C08J5/22

  Films, membranes or diaphragms · CPC title