US 9,812,719 B2
Mixed-reactant fuel cells with selective electrodes
Alexey Serov, Albuquerque, NM (US); Plamen B Atanassov, Santa Fe, NM (US); Elod Gyenge, Vancouver (CA); and Amin Aziznia, Vancouver (CA)
Assigned to STC.UNM, Albuquerque, NM (US)
Appl. No. 14/774,762
Filed by Alexey Serov, Albuquerque, NM (US); Plamen B Atanassov, Santa Fe, NM (US); Elod Gyenge, Vancouver (CA); and Amin Aziznia, Vancouver (CA)
PCT Filed Mar. 11, 2014, PCT No. PCT/US2014/023559
§ 371(c)(1), (2) Date Sep. 11, 2015,
PCT Pub. No. WO2014/164822, PCT Pub. Date Oct. 9, 2014.
Claims priority of provisional application 61/776,437, filed on Mar. 11, 2013.
Prior Publication US 2016/0020475 A1, Jan. 21, 2016
Int. Cl. H01M 8/04 (2016.01); H01M 4/90 (2006.01); H01M 4/88 (2006.01); H01M 4/86 (2006.01); H01M 8/04089 (2016.01); H01M 8/1004 (2016.01); H01M 8/0234 (2016.01); H01M 8/0245 (2016.01)
CPC H01M 8/04104 (2013.01) [H01M 4/861 (2013.01); H01M 4/8605 (2013.01); H01M 4/8821 (2013.01); H01M 4/8828 (2013.01); H01M 4/9008 (2013.01); H01M 8/0234 (2013.01); H01M 8/0245 (2013.01); H01M 8/1004 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for producing a cathode for a mixed reactant fuel cell comprising:
making a self-supporting porous cathode catalyst by:
mixing metal, nitrogen, and carbon precursors with a plurality of dispersed sacrificial support particles under sufficient conditions to allow the metal, nitrogen and carbon precursors to coat the sacrificial support particles and form a metal-nitrogen-carbon (M-N—C) compound/sacrificial support matrix;
heat treating the M-N—C compound/sacrificial support matrix to produce active sites in the matrix; and
removing the sacrificial support, thereby producing a self-supporting porous catalyst;
mixing the self-supporting porous catalyst with carbon black and an ionomer to form an ink;
coating a flexible gas diffusion layer with the ink.
 
8. A method for producing a cathode for a mixed reactant fuel cell comprising:
making a self-supporting porous cathode catalyst by:
mixing Fe-AApyr precursors with a sacrificial support under sufficient conditions to allow the Fe-AApyr precursors to coat the sacrificial support and form a matrix;
heat treating the matrix to produce active sites in the matrix; and
removing the sacrificial support, thereby producing a self-supporting porous catalyst;
mixing the self-supporting porous catalyst with carbon black and an ionomer to form an ink;
coating a flexible gas diffusion layer with the ink.