Aisin Seiki Kabushiki Kaisha

Michiaki Kato

Michio Asukabe

Masaya Kawasumi

Takumi Taniguchi

Yu Morimoto

Shinji Nezu

Chiaki Yamada

Naoki Ito

The present invention is a grafted polymer electrolyte membrane prepared by first preparing a precursor membrane comprising a polymer which is capable of being graft polymerized, exposing the surface of the precursor membrane to a plasma in an oxidative atmosphere, then graft-polymerizing a side chain polymer to the plasma treated precursor membrane and introducing a proton conductive functional group to the side chain. The resulting grafted polymer electrolyte membrane has excellent stability and performance when used in a proton-exchange membrane fuel cell or for electrolysis of water.

Grafted polymer electrolyte membrane, method of producing a grafted polymer electrolyte membrane, and fuel cell comprising the same

A solid polyelectrolyte membrane for a fuel cell, comprises a synthetic resin comprising main chains and side chains, the main chains having a copolymer structure of a first olefin hydrocarbon and an olefin perfluorocarbon, the side chains having a sulfonic acid group containing crosslinked copolymer structure of a second olefin hydrocarbon and a diolefin hydrocarbon. The solid polyelectrolyte membrane is an inexpensive, solid polyelectrolyte membrane for fuel cells, of which the water content is controlled so that it does not cause too much wetting of electrode catalysts.

Solid polyelectrolyte membrane for fuel cells, and method for producing it

Growing community of inventors

Aichi-ken, Japan

Michiaki Kato