US 12,002,968 B2
Method of manufacturing catalyst slurry for fuel cells and method of manufacturing electrode for fuel cells using the same
Yoon Hwan Cho, Seoul (KR); Kook Il Han, Seongnam-si (KR); and Su Won Seol, Hwaseong-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed on Jun. 15, 2020, as Appl. No. 16/901,479.
Claims priority of application No. 10-2019-0163370 (KR), filed on Dec. 10, 2019.
Prior Publication US 2021/0175516 A1, Jun. 10, 2021
Int. Cl. H01M 4/92 (2006.01); H01M 4/86 (2006.01); H01M 4/88 (2006.01); H01M 4/90 (2006.01)
CPC H01M 4/926 (2013.01) [H01M 4/8647 (2013.01); H01M 4/8668 (2013.01); H01M 4/8814 (2013.01); H01M 4/8828 (2013.01); H01M 4/8882 (2013.01); H01M 4/9041 (2013.01); H01M 4/9083 (2013.01); H01M 4/921 (2013.01); H01M 4/8835 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of manufacturing catalyst slurry for fuel cells, the method comprising:
preparing a catalyst comprising a porous carrier and catalyst metal;
introducing the catalyst, a solvent, and an ionomer into a chamber; and
infiltrating the ionomer into pores of the carrier;
wherein the carrier comprises pores depressed inward from an outer surface of the carrier, the pores comprising a plurality of pore inlets each having an average diameter of 5 nm to 30 nm;
wherein the ionomer comprises a polymer having a radius of gyration of a polymer chain of 5 nm or less;
wherein the infiltrating of the ionomer into pores of the carrier comprises stirring contents of the chamber while applying heat and pressure thereto;
wherein a temperature of the contents of the chamber is increased to 25° C. to 80° C.; and
wherein the pressure applied to the contents of the chamber is 2 bar to 200 bar.