Patent ID: 9059470
Filing Date: 2015-06-16
Classification: H01M,Y02E

Abstract:
1. A method of preparing a cathode for a fuel cell, comprising: (S1) preparing a first catalyst layer forming ink and a second catalyst layer forming ink; and (S2) spraying the first and second catalyst layer forming inks to an electrolyte membrane or a gas diffusion layer by ink jet spraying such that the first catalyst layer forming ink is sprayed to a portion that faces a channel defined therein and the second catalyst layer forming ink is sprayed to a portion that does not face the channel, wherein the first catalyst layer forming ink consists of a metal catalyst or a metal catalyst on a carbon-based support; a polymer ionomer; and a solvent, and wherein the second catalyst layer forming ink consists of a metal catalyst or a metal catalyst on a carbon-based support; a polymer ionomer; a hydrophobic polymer-based water-repelling enhancer selected from the group consisting of polychlorotrifluoroethylene and fluorinated ethylene propylene copolymer; and a solvent.