High performance proton-conducting solid oxide fuel cells with a stable Sm0.5Sr0.5Co3-δ-Ce0.8Sm0.2O2-δ composite cathode

Wenping Sun, Litao Yan, Lin Bin, Shangquan Zhang, Wei Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

A Sm0.5Sr0.5CoO3-δ-Ce0.8Sm0.2O2-δ (SSC-SDC) composite is employed as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs). BaZr0.1Ce0.7Y0.2O3-δ (BZCY) is used as the electrolyte, and the system exhibits a relatively high performance. An extremely low electrode polarization resistance of 0.066 Ω cm2 is achieved at 700 °C. The maximum power densities are: 665, 504, 344, 214, and 118 mW cm-2 at 700, 650, 600, 550, and 500 °C, respectively. Moreover, the SSC-SDC cathode shows an essentially stable performance for 25 h at 600 °C with a constant output voltage of 0.5 V. This excellent performance implies that SSC-SDC, which is a typical cathode material for SOFCs based on oxide ionic conductor, is also a promising alternative cathode for H-SOFCs.

Original languageEnglish (US)
Pages (from-to)3155-3158
Number of pages4
JournalJournal of Power Sources
Volume195
Issue number10
DOIs
StatePublished - May 15 2010

Keywords

  • Cathode
  • Proton-conducting solid oxide fuel cells
  • SmSrCoO-CeSmO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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