	US 12,308,484 B2
	Methods of manufacturing a gas diffusion layer and an electrochemical cell incorporating the same
Arne Ballantine, Incline Village, NV (US); Chockkalingam Karuppaiah, Fremont, CA (US); and William F. Smith, Windsor, CT (US)
Assigned to INFINITY FUEL CELL AND HYDROGEN, INC., Windsor, CT (US); and Ohmium International, Inc., Newark, CA (US)
Filed by OHMIUM INTERNATIONAL, Inc., Incline Village, NV (US); and INFINITY FUEL CELL AND HYDROGEN, INC., Windsor, CT (US)
Filed on Sep. 3, 2021, as Appl. No. 17/466,766.
Claims priority of provisional application 63/074,866, filed on Sep. 4, 2020.
Prior Publication US 2022/0077475 A1, Mar. 10, 2022
Int. Cl. H01M 8/0232 (2016.01); B22F 1/00 (2022.01); B22F 1/10 (2022.01); B22F 3/10 (2006.01); C22C 38/02 (2006.01); C22C 38/40 (2006.01); H01M 8/10 (2016.01)

CPC H01M 8/0232 (2013.01) [B22F 1/10 (2022.01); B22F 3/1021 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); C22C 38/02 (2013.01); C22C 38/40 (2013.01); H01M 2008/1095 (2013.01)]

11 Claims

1. A method of manufacturing an anode gas diffusion layer for a proton exchange membrane (PEM) electrolyzer, comprising:

forming three powder layers in a die cavity consisting of a noble metal powder, a mixture of stainless steel powder and lubricant, and another layer of the noble metal powder;

compressing the three powder layers in the die cavity to form a green sheet;

de-binding the green sheet; and

sintering the green sheet to manufacture the anode gas diffusion layer for the PEM electrolyzer, wherein the anode gas diffusion layer includes a noble metal coating on a first side of the anode gas diffusion layer and on a second side of the anode gas diffusion layer.