US 12,338,539 B1
Hybrid electrocatalyst layers for membrane-based electrochemical devices and processes for making the same
Chockkalingam Karuppaiah, Fremont, CA (US); and Arne Ballantine, Incline Village, NV (US)
Assigned to Ohmium International, Inc., Newark, CA (US)
Filed by Ohmium International, Inc., Newark, CA (US)
Filed on Jul. 19, 2024, as Appl. No. 18/778,577.
Int. Cl. C25B 9/23 (2021.01); C25B 11/051 (2021.01); C25B 13/08 (2006.01); H01M 4/88 (2006.01)
CPC C25B 9/23 (2021.01) [C25B 11/051 (2021.01); C25B 13/08 (2013.01); H01M 4/8814 (2013.01); H01M 4/8885 (2013.01); H01M 4/8896 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A process for making an electrochemical cell comprising:
coating an ion-conducting slurry onto a decal layer;
drying the ion-conducting slurry to form an ion-conducting layer;
transferring the ion-conducting layer from the decal layer onto an ion-conducting polymer membrane;
coating a nonionic conductive slurry onto a species diffusion/transport layer to form a coated species diffusion/transport layer, wherein the nonionic conductive slurry includes a solvent, a nonionic conductive binder, and an electrocatalyst;
sintering the coated diffusion layer to form a nonionic conductive catalyst layer on the species diffusion/transport layer; and
hot pressing the nonionic conductive catalyst layer onto the ion-conducting layer.