US 12,456,746 B2
Polymer electrolyte membrane for fuel cells and method for manufacturing the same
Jong Kil Oh, Gyeonggi-do (KR); In Yu Park, Seoul (KR); and Bo Ki Hong, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Dec. 19, 2022, as Appl. No. 18/083,911.
Application 18/083,911 is a division of application No. 16/983,248, filed on Aug. 3, 2020, granted, now 11,557,783.
Claims priority of application No. 10-2019-0109843 (KR), filed on Sep. 5, 2019.
Prior Publication US 2023/0121105 A1, Apr. 20, 2023
Int. Cl. H01M 8/1053 (2016.01); H01M 8/10 (2016.01); H01M 8/1069 (2016.01)
CPC H01M 8/1053 (2013.01) [H01M 8/1069 (2013.01); H01M 2008/1095 (2013.01); H01M 2300/0082 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A polymer electrolyte membrane for fuel cells, comprising a pair of composite films,
wherein each of the composite film comprises:
a porous reinforcement film; and
an ionomer provided to a surface and pores of the porous reinforcement film,
wherein the pair of the composite films is thermally bonded,
wherein the porous reinforcement films of the composite films are bonded to each other, thus forming a bonding surface,
wherein the polymer electrolyte membrane has a symmetrical structure such that each side has an equal number of films based on the bonding surface between the pair of the composite films, and
wherein the pair of the composite films is thermally bonded such that each of the porous reinforcement films of each of the respective composite films are bonded to each other so as to be opposite each other.
 
2. A fuel cell comprising a polymer electrolyte membrane of claim 1.