Toyota Jidosha Kabushiki Kaisha

Noriaki Ishihara

Masao Okumura

Yoshihiro Hori

Sozaburo Ohashi

Yoshito Endou

A catalyst ink for improving the performance of catalyst electrodes in a fuel cell is produced by the following procedure. A catalyst dispersion is prepared by dispersing catalyst-supported particles as conductive particles with a catalyst supported thereon in a solvent. A gel material having viscoelasticity is prepared by mixing an ionomer with a volatile solvent. A catalyst ink having a desired viscosity is produced by stirring and mixing the catalyst dispersion with the gel material.

Manufacturing method of catalyst ink, manufacturing method of fuel cell, and fuel cell

It becomes easy to regulate the storage modulus of the ionomer solution to be not lower than 150 Pa. The production method of catalyst ink for fuel cell includes steps of: (i) preparing a catalyst dispersion by mixing an electrode catalyst, water and an alcohol; (ii) preparing a gelated ionomer solution by mixing an ionomer and a solvent; and (iii) producing catalyst ink by mixing the catalyst dispersion and the gelated ionomer solution, wherein the step (ii) comprises concentration a step of concentrating the gelated ionomer solution.

Production method of catalyst ink for fuel cell, manufacturing method of catalyst layer for fuel cell and manufacturing method of membrane electrode assembly for fuel cell

Growing community of inventors

Toyota, Japan

Noriaki Ishihara