US 12,463,225 B2
Method for producing catalyst ink
Shuto Mochizuki, Toyota (JP); Kazuhiro Hirabayashi, Toyota (JP); Junji Nakanishi, Kasugai (JP); and Makoto Ichikawa, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Dec. 6, 2023, as Appl. No. 18/530,548.
Claims priority of application No. 2022-198393 (JP), filed on Dec. 13, 2022.
Prior Publication US 2024/0194897 A1, Jun. 13, 2024
Int. Cl. H01M 4/86 (2006.01); H01M 4/88 (2006.01); H01M 4/92 (2006.01); H01M 4/04 (2006.01); H01M 8/10 (2016.01)
CPC H01M 4/8663 (2013.01) [H01M 4/8828 (2013.01); H01M 4/926 (2013.01); H01M 4/04 (2013.01); H01M 2008/1095 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method for producing a catalyst layer for fuel cells,
wherein the method comprises obtaining a catalyst ink, and forming the catalyst layer by applying the catalyst ink to a substrate;
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 2.8831 μm or more and 2.9913 μm or less;
wherein, a peel strength of the catalyst layer from the substrate is 0.7 N/m or more and 0.8 N/m or less; and
wherein a weight per unit area of the cation additive in the catalyst ink applied to the substrate, is 3 μg/cm2 or more and 3.27 μg/cm2 or less.