US 11,811,070 B2
Fuel cell membrane electrode assembly and polymer electrolyte fuel cell
Hiroyuki Morioka, Tokyo (JP)
Assigned to TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed by TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed on Apr. 8, 2021, as Appl. No. 17/225,361.
Application 17/225,361 is a continuation of application No. PCT/JP2019/039898, filed on Oct. 9, 2019.
Claims priority of application No. 2018-191008 (JP), filed on Oct. 9, 2018; application No. 2018-191009 (JP), filed on Oct. 9, 2018; and application No. 2018-191010 (JP), filed on Oct. 9, 2018.
Prior Publication US 2021/0226223 A1, Jul. 22, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/86 (2006.01); H01M 4/92 (2006.01); H01M 8/04119 (2016.01); H01M 8/1004 (2016.01); H01M 8/10 (2016.01)
CPC H01M 4/8657 (2013.01) [H01M 4/926 (2013.01); H01M 8/04149 (2013.01); H01M 8/1004 (2013.01); H01M 2008/1095 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fuel cell membrane electrode assembly, comprising:
a polyelectrolyte film, and two electrocatalyst layers sandwiching the polyelectrolyte film;
at least one of the two electrocatalyst layers comprises catalyst support particles with a hydrophobic coating, a polyelectrolyte, and a fibrous material having an average fiber diameter that is 10 nm or more and 300 nm or less; and,
the fibrous material has a mass that is 0.2 times or more and 1.0 times or less the mass of a carrier in the catalyst support particles.