US 12,293,854 B2
Electrode material
Rüdiger-Bernd Schweiss, Meitingen (DE); Christian Meiser, Meitingen (DE); and Dana Cazimir, Meitingen (DE)
Assigned to SGL CARBON SE, Wiesbaden (DE)
Appl. No. 18/250,634
Filed by SGL CARBON SE, Wiesbaden (DE)
PCT Filed Oct. 26, 2021, PCT No. PCT/EP2021/079620
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/090196, PCT Pub. Date May 5, 2022.
Claims priority of application No. 10 2020 213 461.8 (DE), filed on Oct. 26, 2020.
Prior Publication US 2023/0395279 A1, Dec. 7, 2023
Int. Cl. H01B 1/04 (2006.01); H01B 13/00 (2006.01)
CPC H01B 1/04 (2013.01) [H01B 13/0016 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for producing an electrode material for gas diffusion layers, comprising the following steps:
a) providing at least one layer of fibrous structure,
b) providing at least one layer of thermoplastic material,
c) stacking the at least one layer of fibrous structure from step a) with the at least one layer of thermoplastic material from step b),
d) joining the stacked layers of step c) by applying a pressure of 2 to 80 bar and a temperature of from 70 to 280° C. into a composite material, and
e) carbonizing the composite material from step d) at temperatures of from 1400 to 2500° C. in a protective gas atmosphere,
wherein the thermoplastic material of the at least one layer from step b) comprises at least one selected from the group consisting of polyethylene polypropylene, ethylene-vinyl acetate copolymers, polyvinyl butyral, cellulose acetate, polyvinyl alcohol, vinylpyrrolidone-vinyl acetate copolymers, styrene-maleic anhydride copolymers, and polyethylene.