US 12,119,520 B2
Membrane electrode assembly for fuel cells
Yong Min Kim, Seongnam-si (KR); Bum Wook Roh, Seoul (KR); Seok Jung Park, Seoul (KR); Ki Sub Lee, Yongin-si (KR); and Ha Yeong Yu, Seoul (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 Nov. 9, 2020, as Appl. No. 17/092,590.
Application 17/092,590 is a division of application No. 15/834,715, filed on Dec. 7, 2017, granted, now 10,862,139.
Claims priority of application No. 10-2017-0077549 (KR), filed on Jun. 19, 2017.
Prior Publication US 2021/0057765 A1, Feb. 25, 2021
Int. Cl. H01M 8/0276 (2016.01); H01M 4/88 (2006.01); H01M 8/10 (2016.01); H01M 8/1004 (2016.01); H01M 8/1039 (2016.01); H01M 8/106 (2016.01); H01M 8/1062 (2016.01); H01M 8/1086 (2016.01)
CPC H01M 8/0276 (2013.01) [H01M 4/8814 (2013.01); H01M 4/8817 (2013.01); H01M 4/8882 (2013.01); H01M 4/8896 (2013.01); H01M 8/1004 (2013.01); H01M 8/1039 (2013.01); H01M 8/106 (2013.01); H01M 8/1062 (2013.01); H01M 8/1093 (2013.01); H01M 2008/1095 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A membrane electrode assembly, comprising:
a cathode and an anode;
an electrolyte membrane stacked between the cathode and the anode,
wherein hydrogen gas is decomposed by an oxidation reaction in the anode, and water is generated by reduction reaction in the cathode,
wherein the electrolyte membrane comprises at least one ionomer layer and a reinforcing layer, the at least one ionomer layer including:
a first layer, comprising an ionomer, stacked on one side of the cathode or anode;
a second layer, comprising an ionomer, stacked on one side of the first layer, the second layer having at least the same cross-sectional area as that of the reinforcing layer,
wherein a cross-sectional area of the first layer is smaller than a cross-sectional area of the reinforcing layer and larger than or equal to a cross-sectional area of the cathode or anode,
wherein the cross-sectional areas of the first and second layers, the reinforcing layer, and the cathode or anode are measured in a length-wise direction orthogonal to a stacking direction, and wherein the first layer, the second layer, and the reinforcing layer are stacked between the cathode and the anode in that order.