US 11,705,558 B2
Patterned catalyst layers in fuel cells
Lei Cheng, San Jose, CA (US); Michael Metzger, Sunnyvale, CA (US); Saravanan Kuppan, Sunnyvale, CA (US); and Christina Johnston, Mountain View, CA (US)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jun. 19, 2020, as Appl. No. 16/906,583.
Prior Publication US 2021/0399315 A1, Dec. 23, 2021
Int. Cl. H01M 8/0263 (2016.01); H01M 4/86 (2006.01); H01M 4/92 (2006.01); H01M 8/0258 (2016.01)
CPC H01M 8/0263 (2013.01) [H01M 4/861 (2013.01); H01M 4/8663 (2013.01); H01M 4/926 (2013.01); H01M 8/0258 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fuel cell comprising:
a flow field plate having at least one channel and at least one land, each of the at least one channel being positioned between two adjacent lands; and
a gas diffusion layer (GDL) positioned between the flow field plate and a catalyst layer, the catalyst layer having a first region aligned with the at least one channel and a second region aligned with the at least one land, the first region having a first porosity, the second region having a second porosity different from the first porosity, the second region comprises a metal organic framework (MOF), and the first region does not include the MOF.