La0.75Sr0.25Cr0.5Mn0.5O3-δ as cathode for electrolysis and co-electrolysis of CO2 and H2O in solid oxide electrolysis cell

Zheng Ma, Yongyong Li, Yifeng Zheng, Wenlu Li, Xingyu Chen, Xiufu Sun, Xing Chen, Juan Zhou*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The cathode of solid oxide electrolysis cell (SOEC) is used as a place for fuel gas electrolysis/co-electrolysis, and its performance significantly affects the efficiency of electrolysis. La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM) is a potential SOEC cathode material due to its excellent redox stability and catalytic ability for fuel gas. An electrolyte-supported LSCM/YSZ/LSCM symmetrical cell and LSCM/YSZ/LSCF full cell were prepared and evaluated for high temperature steam electrolysis, carbon dioxide electrolysis and co-electrolysis. Under the applied voltage, both the symmetrical electrolysis cell and the full electrolysis cell can effectively electrolysis CO2 and H2O. During the experiment, by changing the operating conditions, the influence of different temperatures, concentration of CO2 and H2O, and applied voltage was studied to evaluate the electrochemical performance of SOEC. In order to further verify the long-term performance of SOEC, constant voltage was applied for co-electrolysis of CO2 and H2O. During the entire electrolysis process, the SOEC showed a stable current density of 0.1A·cm-2 under the applied voltage 1.5 V for more than 24 h.
Original languageEnglish
JournalCeramics International
Volume47
Issue number16
Pages (from-to)23350-23361
Number of pages12
ISSN0272-8842
DOIs
Publication statusPublished - 2021

Keywords

  • Solid oxide electrolysis cell (SOEC)
  • La0.75Sr0.25Cr0.5Mn0.5O3-δ (LSCM) cathode
  • Electrolyte-supported
  • Symmetrical cell and full cell
  • Electrolysis and co-electrolysis

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