Oxygen nonstoichiometry and cathodic property of Ce0.6Mn0.3Fe0.1O2-δ for high temperature steam electrolysis cell using LaGaO3-based oxide electrolyte

Kohei Hosoi, Takaaki Sakai, Shintaro Ida, Tatsumi Ishihara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Steam electrolysis was studied by using a new oxide cathode of Ce0.6Mn0.3Fe0.1O2-δ (CMF). It was found that this cathode showed almost the same performance as a conventional Ni-based cathode without H2 flow, and H2 generation rate obeyed the Faraday's law at 900-700°C. By XRD measurements after operation, CMF phase was hardly changed after steam electrolysis. A long-term durability test was operated, and it revealed that CMF cathode showed good stability over 90 h at 800°C. The impedance spectra were measured under applied DC bias potentials. These revealed that polarization resistance and ohmic resistance decreased with increasing DC bias potential. This decrease of ohmic resistance was related to the increase in electronic conductivity of CMF. CMF was n-type semiconductor and the electronic conductivity of CMF increased with decreasing oxygen partial pressure.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsS. C. Singhal, K. Eguchi
PublisherElectrochemical Society Inc.
Pages3315-3322
Number of pages8
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2015
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: Jul 26 2015Jul 31 2015

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
CountryUnited Kingdom
CityGlasgow
Period7/26/157/31/15

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Hosoi, K., Sakai, T., Ida, S., & Ishihara, T. (2015). Oxygen nonstoichiometry and cathodic property of Ce0.6Mn0.3Fe0.1O2-δ for high temperature steam electrolysis cell using LaGaO3-based oxide electrolyte. In S. C. Singhal, & K. Eguchi (Eds.), Solid Oxide Fuel Cells 14, SOFC 2015 (1 ed., pp. 3315-3322). (ECS Transactions; Vol. 68, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/06801.3315ecst