Toyota Jidosha Kabushiki Kaisha

Kazuhiro Hirabayashi

Junji Nakanishi

Makoto Ichikawa

Shuto Mochizuki

A method for producing a catalyst ink for fuel cells, wherein the method comprises obtaining the catalyst ink; wherein the catalyst ink comprises a catalyst, a carbon support, an ionomer, a solvent and a cation additive; wherein the catalyst is supported on the carbon support; wherein the carbon support is carbon support particles; wherein a particle size D90 of the carbon support particles in the catalyst ink is less than 3 μm; wherein, when a catalyst layer is formed by applying the catalyst ink to a substrate, a peel strength of the catalyst layer from the substrate is less than 3 N/m; and wherein a weight per unit area of the cation additive in the catalyst ink applied to the substrate, is 2.1 μg/cmor more and 3.3 μg/cmor less.

Method for producing catalyst ink

A catalyst layer for a fuel cell electrode includes a metal carrying catalyst containing a carbon carrier and a metal catalyst carried on the carbon carrier, and an ionomer, wherein a volume of micropores having a diameter of 5 nm to 40 nm in micropores of the carbon carrier is 4.5 ml/g to 9.3 ml/g, and a weight ratio of the carbon carrier to the ionomer is 1:0.50 to 1:0.85. A fuel cell includes the catalyst layer for a fuel cell electrode.

Growing community of inventors

Shizuoka, Japan

Kazuhiro Hirabayashi