US 12,334,614 B2
Polyvinylidene fluoride membrane support
Mevlut Tascan, Breinigsville, PA (US); and Todd Crumbling, Perkasie, PA (US)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/624,614
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jul. 15, 2020, PCT No. PCT/US2020/042034
§ 371(c)(1), (2) Date Jan. 4, 2022,
PCT Pub. No. WO2021/011590, PCT Pub. Date Jan. 21, 2021.
Claims priority of provisional application 62/875,096, filed on Jul. 17, 2019.
Claims priority of provisional application 62/874,095, filed on Jul. 15, 2019.
Prior Publication US 2022/0271315 A1, Aug. 25, 2022
Int. Cl. H01M 8/106 (2016.01); H01M 8/10 (2016.01); H01M 8/1004 (2016.01); H01M 8/1023 (2016.01); H01M 8/1027 (2016.01); H01M 8/1032 (2016.01); H01M 8/1039 (2016.01); H01M 8/1062 (2016.01)
CPC H01M 8/106 (2013.01) [H01M 8/1004 (2013.01); H01M 8/1023 (2013.01); H01M 8/1027 (2013.01); H01M 8/1032 (2013.01); H01M 8/1039 (2013.01); H01M 8/1062 (2013.01); H01M 2008/1095 (2013.01); H01M 2300/0082 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fuel cell membrane electrode assembly (MEA) comprising:
a) a substrate, the substrate comprising:
i) a woven layer comprising a yarn of polyvinylidene fluoride fiber, wherein the yarn is 7 denier to 25 denier; and
ii) a nanofiber layer comprising polyvinylidene fluoride nanofibers deposited on the woven layer, wherein the nanofiber layer is 1 to 10 micrometers thick; wherein the substrate exhibits a porosity of at least 70 percent; and wherein the substrate is less than 30 micrometers thick; and
b) a porous polymer membrane deposited on the nanofiber layer.