US 12,068,487 B2
Cathode catalyst layer for fuel cell and fuel cell
Hiroaki Suzuki, Osaka (JP); Kazuya Yamasaki, Kyoto (JP); and Hitoshi Ishimoto, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/436,577
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007838
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/179583, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 2019-039712 (JP), filed on Mar. 5, 2019.
Prior Publication US 2022/0149388 A1, May 12, 2022
Int. Cl. H01M 4/92 (2006.01); H01M 8/10 (2016.01); H01M 8/1004 (2016.01)
CPC H01M 4/926 (2013.01) [H01M 8/1004 (2013.01); H01M 2008/1095 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A cathode catalyst layer for a fuel cell, comprising:
a first catalyst layer including a first particulate conductive member, first catalyst particles, and a first fibrous conductive member, at least part of the first catalyst particles being supported on the first particulate conductive member; and
a second catalyst layer including a second particulate conductive member and second catalyst particles, at least part of the second catalyst particles being supported on the second particulate conductive member, wherein
a second catalyst support density D2 representing a ratio of a mass of the second catalyst particles supported on the second particulate conductive member to a total mass of the second particulate conductive member and the second catalyst particles supported on the second particulate conductive member is greater than a first catalyst support density D1 representing a ratio of a mass of the first catalyst particles supported on the first particulate conductive member to a total mass of the first particulate conductive member and the first catalyst particles supported on the first particulate conductive member.