US 12,334,566 B2
Coated fuel cell catalyst materials
Jonathan Mailoa, Cambridge, MA (US); Sondra Hellstrom, East Palo Alto, CA (US); Georgy Samsonidze, San Francisco, CA (US); Soo Kim, Cambridge, MA (US); Mordechai Kornbluth, Brighton, MA (US); and Karim Gadelrab, Boston, MA (US)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Feb. 22, 2021, as Appl. No. 17/180,952.
Prior Publication US 2022/0271298 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/92 (2006.01); H01M 4/86 (2006.01); H01M 4/90 (2006.01)
CPC H01M 4/921 (2013.01) [H01M 4/8663 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fuel cell catalyst material comprising:
metal catalyst particles formed of a metal material; and
a carbon-based coating composition at least partially coating at least some of the metal catalyst particles, the carbon-based coating composition including a carbon network, the carbon-based coating composition doped with boron and nitrogen, the carbon-based coating composition including a number of defects formed by one or more vacated carbon atoms in the carbon network, the carbon-based coating composition made from a non-aromatic carbon molecule, the non-aromatic carbon molecule is chitosan, a sugar molecule, or a cellulose molecule, the carbon-based coating composition totally coats at least some of the metal catalyst particles, and the carbon-based coating composition has a thickness of 0.1 to 0.9 nanometers.