	US 11,996,590 B2
	Hybrid gas diffusion layer for electrochemical cells
Michael Ketzer, Collenberg (DE); and Klaus Friedrich Gleich, Nurenberg (DE)
Assigned to Johns Manville, Denver, CO (US)
Appl. No. 17/292,260
Filed by JOHNS MANVILLE, Denver, CO (US)
PCT Filed Nov. 28, 2019, PCT No. PCT/EP2019/082932 § 371(c)(1), (2) Date May 7, 2021, PCT Pub. No. WO2020/120154, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 10 2018 009 747.2 (DE), filed on Dec. 14, 2018.
Prior Publication US 2022/0123327 A1, Apr. 21, 2022
Int. Cl. H01M 8/0245 (2016.01); H01M 8/0234 (2016.01); H01M 8/0236 (2016.01); H01M 8/10 (2016.01)

CPC H01M 8/0245 (2013.01) [H01M 8/0234 (2013.01); H01M 8/0236 (2013.01); H01M 2008/1095 (2013.01)]

24 Claims

1. A gas diffusion layer (GDL), comprising

(i) a base carrier fiber mat (BFM),

characterized in that

(ii) the base carrier fiber mat (BFM) is a hybrid base carrier mat (H-BFM), and

(iii) the aforementioned hybrid base carrier mat (H-BFM) is provided with a high-porous conductive impregnation (HPCI), and

(iv) the aforementioned impregnated hybrid base carrier mat (H-BFM) optionally contains an additional microporous layer (MPL), and

wherein the hybrid base carrier mat (H-BFM) contains 5 to 70 weight-% electrically conductive fibers and 95 to 30 weight-% electrically non-conductive fibers, based upon the weight of fibers present in the hybrid base carrier mat (H-BFM).