US 12,107,277 B2
Electrochemical cell catalyst layers
Mordechai Kornbluth, Brighton, MA (US); Daniil A Kitchaev, Brookline, MA (US); Jonathan Braaten, Sunnyvale, CA (US); Lei Cheng, San Jose, CA (US); and Christina Johnston, Spanish Fort, AL (US)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jun. 16, 2022, as Appl. No. 17/841,896.
Prior Publication US 2023/0411628 A1, Dec. 21, 2023
Int. Cl. H01M 4/86 (2006.01); C25B 9/23 (2021.01); C25B 11/031 (2021.01); C25B 11/037 (2021.01); C25B 11/051 (2021.01); C25B 11/065 (2021.01); H01M 4/90 (2006.01); H01M 4/92 (2006.01); H01M 8/10 (2016.01)
CPC H01M 4/8626 (2013.01) [C25B 9/23 (2021.01); C25B 11/031 (2021.01); C25B 11/037 (2021.01); C25B 11/051 (2021.01); C25B 11/065 (2021.01); H01M 4/9083 (2013.01); H01M 4/926 (2013.01); H01M 2004/8689 (2013.01); H01M 2008/1095 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electrochemical cell cathode catalyst layer comprising:
electrocatalyst particles;
an electrocatalyst support having an electronically conductive porous material including a surface morphology comprising
a plurality of micropores with a diameter of less than about 2 nm having a roughened inner pore wall surface of a first surface roughness and including a plurality of peaks and valleys, and
a plurality of mesopores with a diameter of more than about 10 nm having a roughened inner pore wall surface of a second surface roughness including a plurality of peaks and valleys, the first surface roughness being greater than the second surface roughness,
the surface morphology being configured to contain the electrocatalyst particles within the plurality of pores and to enhance mass transport of molecular oxygen to the electrocatalyst particles by adsorbing molecular oxygen to the surface morphology; and
an ionomer adhered to the electrocatalyst, the electrocatalyst support, or both.