Significantly Improving the Durability of Single-Chamber Solid Oxide Fuel Cells: A Highly Active CO 2 -Resistant Perovskite Cathode

Yuan Zhang, Xuechao Gao, Jaka Sunarso, Bo Liu, Wei Zhou, Meng Ni, Zongping Shao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

The single-chamber solid oxide fuel cell (SC-SOFC) represents an attractive alternative to batteries for micropower applications given its simplified stack design, easy gas management, lower operation temperature, and quicker start-up. Its stable operation over long duration relies on the availability of CO 2 -resistant cathode materials with high oxygen reduction reaction (ORR) activity. Here, we reported a novel perovskite oxide cathode SrSc 0.075 Ta 0.025 Fe 0.9 O 3-δ (SSTF75), which provides CO 2 resistance and high ORR activity. A peak power density of 1430 mW cm -2 was achieved with the SSTF75/Sm 0.2 Ce 0.8 O 1.9 cathode at 650 °C with a methane and oxygen gas mixture (1:1 v/v ratio). It retained stable voltage performance at 600 °C for an over 90 h duration when discharged at a current density of 1000 mA cm -2 . This work not only represents an advancing step in the SC-SOFC field but also authenticates an effective codoping strategy for the design of a CO 2 -resistant cathode for low-temperature applications.

Original languageEnglish
Pages (from-to)1337-1343
Number of pages7
JournalACS Applied Energy Materials
Volume1
Issue number3
DOIs
Publication statusPublished - 26 Mar 2018

Keywords

  • cathode
  • oxygen reduction reaction
  • perovskite
  • single-chamber SOFC
  • solid oxide fuel cells

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Chemical Engineering (miscellaneous)
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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