A novel electrode with multifunction and regeneration for highly efficient and stable symmetrical solid oxide cell

Yunfeng Tian, Yun Liu, Lichao Jia, Aaron Naden, Jing Chen, Bo Chi*, Jian Pu, John T.S. Irvine, Jian Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Symmetrical solid oxide cells (SSOCs) have been extensively recognized due to their simple cell configuration, low cost and reliability. High performance electrode is the key determinant of SSOCs. Herein, a multifunctional perovskite oxide La0.6Ca0.4Fe0.8Ni0.2O3-δ (LCaFN) is investigated as electrode for SSOCs. The results confirm that LCaFN shows excellent oxygen reduction reaction (ORR), oxygen evolution reaction (OER), carbon dioxide reduction reaction (CO2-RR) and hydrogen oxidation reaction (HOR) catalytic activity. In SOFC mode, the SSOCs with LCaFN achieve good electrochemical performance with maximum power density of 300 mW cm−2 at 800 °C. For pure CO2 electrolysis in SOEC mode, polarization resistance of 0.055 Ω cm2 and current density of 1.5 A cm−2 are achieved at 2.0 V at 800 °C. Besides, the cell shows excellent stability both in SOFC mode and SOEC mode. Most importantly, SSOCs with symmetrical LCaFN electrodes show robust and regenerative performance under anodic or cathodic process during the switching gas, showing the great reliability of the SSOCs. The results show that this novel electrode offers a promising strategy for operation of SSOCs.

Original languageEnglish
Article number228620
JournalJournal of Power Sources
Volume475
Early online date16 Aug 2020
DOIs
Publication statusPublished - 1 Nov 2020

Keywords

  • Electrochemical performance
  • Gas switching
  • LaCaFeNiO
  • Multifunctional catalyst
  • Symmetrical solid oxide cells

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