Jsr Corporation

Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Panasonic Corporation

Fusazumi Masaka

Kazuya Iwamoto

Yasumasa Takeuchi

Naoki Mitsuta

Nagayuki Kanaoka

Masaru Iguchi

Yoichi Asano

Kazunori Takada

Kohei Goto

Kiyonori Kita

Hiroshi Sohma

Nobuhiro Saito

Masaaki Nanaumi

Hiroshi Soma

Masayuki Takahashi

Yuichiro Hama

Junji Matsuo

Mayumi Kakuta

Naoshi Yasuda

Junichi Yano

Yuji Naito

Shigeo Kondo

The invention provides a manufacturing process for MEA that enables sufficient bond strength among an electrolyte membrane and electrode substrates even when the electrolyte membrane comprises a heat-resistant material such as an aromatic polymer. The process comprises pressure bonding an electrolyte membrane with catalyzed electrode substrates to form a membrane-electrode assembly, wherein a good solvent for the electrolyte membrane is applied to at least one of facing surfaces of the opposed electrode substrate and the electrolyte membrane prior to the pressure bonding. The electrolyte membrane may comprise a sulfonated aromatic polymer. The good solvent for the electrolyte membrane may be an aprotic dipolar solvent.

Manufacturing process for membrane-electrode assemblies

The invention provides a proton conductive membrane excellent in heat resistance, which has sulfonic acid as ion exchange groups. The proton conductive membrane comprises a nitrogen-containing compound that can be mixed with water in arbitrary proportions and has a boiling point of not lower than 100. degree. C. and a proton conductive resin which has sulfonic acid ion-exchange groups, wherein the nitrogen-containing compound is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the proton conductive resin.

Proton conductive membrane having improved thermal stability

A composite polymer electrolyte membrane is formed from a first polymer electrolyte comprising a sulfonated polyarytene polymer and a second polymer electrolyte comprising another hydrocarbon polymer electrolyte. In the first polymer electrolyte, 2-70 mol % constitutes an aromatic compound unit with an electron-attractive group in its principal chain, while 30-98 mol % constitutes an aromatic compound unit without an electron-attractive group in its principal chain. The second polymer electrolyte is a sulfonated polyether or sulfonated polysulfide polymer electrolyte.

Polymer electrolyte membrane and solid polymer electrolyte fuel cell using same

Growing community of inventors

Tokyo, Japan

Fusazumi Masaka