US 12,288,910 B1
Catalyst coated membrane and preparation method thereof, membrane electrode and fuel cell
Lingfeng Gao, Wuhan (CN); Tianshu Liao, Wuhan (CN); Jianan Wang, Wuhan (CN); Huixuan Liu, Wuhan (CN); Chen Chen, Wuhan (CN); and Yuting Zou, Wuhan (CN)
Assigned to Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co., Ltd., Wuhan (CN)
Filed by Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co., Ltd., Wuhan (CN)
Filed on Dec. 19, 2024, as Appl. No. 18/986,781.
Application 18/986,781 is a continuation of application No. PCT/CN2024/136483, filed on Dec. 3, 2024.
Claims priority of application No. 202410642734.3 (CN), filed on May 23, 2024.
Int. Cl. H01M 8/1004 (2016.01); H01M 4/88 (2006.01); H01M 4/92 (2006.01)
CPC H01M 8/1004 (2013.01) [H01M 4/8828 (2013.01); H01M 4/8882 (2013.01); H01M 4/926 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preparation method of a catalyst coated membrane, including the following steps:
S10, adding sodium type resin to an aqueous-alcohol dispersion of Pt/C catalyst, and stirring and dispersing thoroughly to obtain a catalyst slurry;
S20, coating the catalyst slurry onto a PTFE membrane, drying at room temperature, and then transferring to an inert atmosphere sintering box for heat treatment to obtain a catalyst coated PTFE membrane;
S30, preparing a proton membrane with catalyst transfer layer by thermocompression transfer of the catalyst coated PTFE membrane and a proton exchange membrane;
S40, protonating the proton membrane with catalyst transfer layer to obtain a catalyst coated membrane;
in the step S20, the heat treatment step includes: transferring the PTFE membrane with the catalyst slurry to the inert atmosphere sintering box, introducing an inert gas to fully exclude air, heating to a set temperature, maintaining a heat treatment time, and then naturally cooling to room temperature to obtain the catalyst coated PTFE membrane; the inert gas is nitrogen or argon, the heat treatment temperature is 180° C.-250° C., and the heat treatment time is 20-60 min.