Cathode materials for solid oxide electrolysis cells

Peter Holtappels, John T S Irvine, Shu Wang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The cathode in solid oxide electrolysis cells is the electrode at which water and carbon dioxide can be split into hydrogen, carbon monoxide, and oxygen ions. The state-of-the-art material is a Ni cermet, as developed for solid oxide fuel cells. This electrode shows promising electrolysis rates and compatibility with adjacent cell components, and a basic understanding of its electrode processes has also been gained. However, stability issues have recently triggered a search for alternative materials. Electronically conducting oxides, with or without activation by submicron-scale electrocatalysts, are of interest because of their stability in high water contents, as described in the last part of this chapter.
Original languageEnglish
Title of host publicationHigh-temperature electrolysis
Subtitle of host publicationfrom fundamentals to applications
EditorsWerner Sitte, Rotraut Merkle
Place of PublicationBristol
PublisherIOP Publishing Ltd.
Chapter4
Number of pages24
ISBN (Electronic)9780750339513
ISBN (Print)9780750339490
DOIs
Publication statusPublished - 1 Jan 2023

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