Patent ID: 11923550
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method for producing a catalyst layer for a fuel cell comprising:
preparing a catalyst ink;
applying the catalyst ink onto a surface of an electrolyte membrane, and drying the catalyst ink to form the catalyst layer, or,
applying the catalyst ink to a transfer substrate sheet, then drying the ink to form the catalyst layer, and transferring the catalyst layer onto a surface of an electrolyte membrane,
the catalyst ink comprising:
fibrous conductive members;
a proton conductive resin; and
catalyst particles, wherein:

the fibrous conductive members are inclined relative to a surface direction of the catalyst layer,
a length Lf of the fibrous conductive members and a thickness T of the catalyst layer satisfy the following relational expression: Lf/T≤3, and
a lengthwise direction of the fibrous conductive members, on average, matches a first direction.