US 12,288,909 B2
Method for manufacturing membrane-electrode assembly using nano-dispersed ionomer binder, and membrane-electrode assembly manufactured thereby
Chang Hyun Lee, Seongnam-si (KR); and Jun Hyun Lim, Gyeongju-si (KR)
Assigned to DANKOOK UNIVERSITY CHEONAN CAMPUS INDUSTRY ACADEMIC COOPERATION FOUNDATION, Cheonan-si (KR)
Appl. No. 18/281,447
Filed by DANKOOK UNIVERSITY CHEONAN CAMPUS INDUSTRY ACADEMIC COOPERATION FOUNDATION, Cheonan-si (KR)
PCT Filed Apr. 12, 2022, PCT No. PCT/KR2022/005286
§ 371(c)(1), (2) Date Sep. 11, 2023,
PCT Pub. No. WO2022/225246, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 10-2021-0050479 (KR), filed on Apr. 19, 2021.
Prior Publication US 2024/0162465 A1, May 16, 2024
Int. Cl. H01M 8/1004 (2016.01); C25B 9/23 (2021.01); H01M 8/10 (2016.01)
CPC H01M 8/1004 (2013.01) [C25B 9/23 (2021.01); H01M 2008/1095 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for manufacturing a membrane-electrode assembly for water electrolysis in which a polymer electrolyte membrane is interposed between a cathode and an anode, the method comprising the steps of:
forming a cathode by applying a first electrode composition on one surface of the polymer electrolyte membrane; and
a forming an anode by applying a second electrode composition on another surface of the polymer electrolyte membrane,
wherein the first electrode composition comprises a first catalyst and a first ionomer binder, the first catalyst is a metal catalyst adsorbed on a surface of a carbon-based support, and the first ionomer binder is a first nanodispersion of a first ionomer dispersed under supercritical conditions in a mixed solvent comprising alcohol and water, and
wherein the second electrode composition comprises a second catalyst and a second ionomer binder, the second catalyst is a metal oxide catalyst, and the second ionomer binder is a second nanodispersion of a second ionomer dispersed under supercritical conditions in a mixed solvent comprising alcohol and water.