A cobalt-free Sm0.5Sr0.5Fe0.8Cu 0.2O3-δ-Ce0.8Sm0.2O 2-δ composite cathode for proton-conducting solid oxide fuel cells

Yihan Ling, Jia Yu, Lin Bin, Xiaozhen Zhang, Ling Zhao, Xingqin Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

A cobalt-free composite Sm0.5Sr0.5Fe 0.8Cu0.2O3-δ-Ce0.8Sm 0.2O2-δ (SSFCu-SDC) is investigated as a cathode for proton-conducting solid oxide fuel cells (H-SOFCs) in intermediate temperature range, with BaZr0.1Ce0.7Y0.1Yb 0.1O3-δ (BZCYYb) as the electrolyte. The XRD results show that SSFCu is chemically compatible with SDC at temperatures up to 1100 °C. The quad-layer single cells of NiO-BZCYYb/NiO-BZCYYb/BZCYYb/SSFCu-SDC are operated from 500 to 700 °C with humidified hydrogen (∼3% H 2O) as fuel and the static air as oxidant. It shows an excellent power density of 505 mW cm-2 at 700 °C. Moreover, a low electrode polarization resistance of 0.138 Ω cm2 is achieved at 700 °C. Preliminary results demonstrate that the cobalt-free SSFCu-SDC composite is a promising cathode material for H-SOFCs.

Original languageEnglish (US)
Pages (from-to)2631-2634
Number of pages4
JournalJournal of Power Sources
Volume196
Issue number5
DOIs
StatePublished - Mar 1 2011

Keywords

  • Cobalt-free
  • Composite cathode
  • Polarization resistance
  • Power density
  • Proton-conducting solid oxide fuel cells

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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