US 11,888,166 B2
Gas diffusion layer, a preparation method therefor, a membrane electrode assembly and a fuel cell
Xinghan Shen, Shanghai (CN)
Assigned to SHANGHAI JAZZ NEW MATERIAL TECHNOLOGY CO., LTD., Shanghai (CN)
Appl. No. 17/789,759
Filed by SHANGHAI JAZZ NEW MATERIAL TECHNOLOGY CO., LTD., Shanghai (CN)
PCT Filed Dec. 28, 2020, PCT No. PCT/CN2020/139969
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/136148, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911414606.9 (CN), filed on Dec. 31, 2019.
Prior Publication US 2023/0045638 A1, Feb. 9, 2023
Int. Cl. H01M 4/88 (2006.01); H01M 4/86 (2006.01); H01M 8/1004 (2016.01)
CPC H01M 4/8807 (2013.01) [H01M 4/861 (2013.01); H01M 4/8657 (2013.01); H01M 4/8885 (2013.01); H01M 8/1004 (2013.01); H01M 4/8821 (2013.01); H01M 4/8835 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A gas diffusion layer for fuel cells, the gas diffusion layer comprises a gas diffusion layer substrate and a microporous layer slurry applied directly or by screen printing on the gas diffusion layer substrate, wherein an additive containing catechol or pyrocatechol compounds is added into the microporous layer slurry; wherein the gas diffusion layer substrate applied with the microporous layer slurry is calcined to decompose and release functional groups of an amino acid structure in the additive to form a microporous layer on the surface of the gas diffusion layer substrate; wherein the slurry used in the preparation process of the microporous layer of the gas diffusion layer contains a conductive material, a pore-forming agent, a hydrophobic agent, and a dispersing agent.