US 12,440,894 B2
Porous electrolyzer gas diffusion layer and method of making thereof
Arne Ballantine, Incline Village, NV (US); Chockkalingam Karuppaiah, Fremont, CA (US); Dien Nguyen, Saratoga, CA (US); and James Nguyen, San Jose, CA (US)
Assigned to Ohmium International, Inc., Newark, CA (US)
Filed by Ohmium International, Inc., Newark, CA (US)
Filed on Jul. 23, 2021, as Appl. No. 17/384,033.
Claims priority of provisional application 63/056,820, filed on Jul. 27, 2020.
Prior Publication US 2022/0023946 A1, Jan. 27, 2022
Int. Cl. B22F 5/00 (2006.01); B22F 3/11 (2006.01); B22F 3/16 (2006.01); B22F 3/22 (2006.01); B22F 3/24 (2006.01); C25B 1/04 (2021.01); C25B 9/23 (2021.01); C25B 9/60 (2021.01); C25B 11/032 (2021.01)
CPC B22F 5/006 (2013.01) [B22F 3/1109 (2013.01); B22F 3/16 (2013.01); B22F 3/22 (2013.01); B22F 3/24 (2013.01); C25B 1/04 (2013.01); C25B 9/23 (2021.01); C25B 9/60 (2021.01); B22F 2003/242 (2013.01); B22F 2201/02 (2013.01); B22F 2301/205 (2013.01); B22F 2302/20 (2013.01); B22F 2998/10 (2013.01); C25B 11/032 (2021.01)] 22 Claims
OG exemplary drawing
 
1. A porous titanium sheet configured to function as an anode side gas diffusion layer of a proton exchange membrane (PEM) electrolyzer, wherein the porous titanium sheet is formed by a powder technique,
wherein a first major side of the porous titanium sheet includes a groove and an opposite second major side of the porous titanium sheet has a substantially planar surface which lacks a groove,
wherein the first major side of the porous titanium sheet has a higher porosity than the opposite second major side of the porous titanium sheet,
wherein a continuous porosity gradient is formed between the first major side of the porous titanium sheet and the opposite second major side of the porous titanium sheet,
wherein the porous titanium sheet comprises conductive vias extending through the porous titanium sheet in a thickness direction of the porous titanium sheet, the conductive vias comprising particles of titanium hydride, and
wherein the porous titanium sheet includes a bimodal pore size distribution.