High Temperature Co‐Electrolysis of Steam and CO2 in an SOC Stack: Performance and Durability

Ming Chen, Jens Valdemar Thorvald Høgh, J. U. Nielsen, Janet Jonna Bentzen, Sune Dalgaard Ebbesen, Peter Vang Hendriksen

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

In this work, co‐electrolysis of steam and carbon dioxide was studied in a Topsoe Fuel Cell (TOFC®) 10‐cell stack, containing three different types of Ni/yttria stabilized zirconia (YSZ) electrode supported solid oxide electrolysis cells with a footprint of 12 × 12 cm. The stack was operated at 800 °C and –0.75 A cm–2 with 60% conversion for a period of 1,000 h. One type of the cells showed no long term degradation but actually activation during the entire electrolysis period, while the other two types degraded. The performance and durability of the different cell types is discussed with respect to cell material composition and microstructure. The results of this study show that long term electrolysis is feasible without notable degradation at 800 °C and a current density of –0.75 A cm–2.

Original languageEnglish
JournalFuel Cells
Volume13
Issue number4
Pages (from-to)638-645
ISSN1615-6846
DOIs
Publication statusPublished - 2013
Event10th European SOFC Forum - Kultur- und Kongresszentrum Luzern, Luzern, Switzerland
Duration: 26 Jun 201229 Jun 2012

Conference

Conference10th European SOFC Forum
LocationKultur- und Kongresszentrum Luzern
Country/TerritorySwitzerland
CityLuzern
Period26/06/201229/06/2012

Keywords

  • Carbon Dioxide
  • Co-Electrolysis
  • Energy Conversion
  • Fuel Cell
  • High Temperature Electrolysis
  • Solid Oxide Electrolysis Cell (SOEC)

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