Patent · US Active

Barrier layer for corrosion protection in electrochemical devices

US11299810B2 · kind B2 · utility

8Cited by

5References

13Claims

0Family size

Assignee

Greenerity GmbH · DE

Inventors

Jens-Peter Suchsland · Alzenau, DE
Alessandro Ghielmi · Frankfurt am Main, DE
Pia Braun · Langenselbold, DE

Key dates

Filing date	Feb 20, 2014
Grant date	Apr 12, 2022
Priority date	—
Expiry date	Jul 28, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention is directed to a barrier layer for corrosion protection in electrochemical devices, e.g. carbon based gas diffusion layers (GDLs) in electrochemical devices, comprising electrically conductive ceramic material and a non-ionomeric polymer binder. The electrically conductive ceramic material has an electrical conductivity of >0.1 S/cm, preferably >1 S/cm in air atmosphere (as detected by the powder method) and is selected from the group of precious metal and/or base metal containing oxides, carbides, nitrides, borides and mixtures and combinations thereof. Membrane-electrode assemblies (MEAs), catalyst-coated membranes (CCMs), gas diffusion electrodes (GDEs) and gas diffusion layers (GDLs) comprising the barrier layer of the invention show improved corrosion resistance, preferably against carbon corrosion; particularly in start-up/shut-down cycles and fuel starvation situations of PEM fuel cells.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.