Synthesis of Ba0.3Ca0.7Co0.8Fe0.2O3-δ composite material as novel catalytic cathode for ceria-carbonate electrolyte fuel cells

Research output: Contribution to journalArticlepeer-review

Authors

  • Muhammad Afzal
  • Rizwan Raza
  • Shangfeng Du
  • Raquel Bohn Lima
  • Bin Zhu

Colleges, School and Institutes

External organisations

  • KTH Royal Institute of Technology
  • COMSATS Institute of Information Technology
  • Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, PR China

Abstract

This work reports a new composite BaxCa1-xCoyFe1-yO3-δ (BCCF) cathode material for advanced and low temperature solid oxide fuel cells (SOFCs). The BCCF-based composite material was synthesized by sol gel method and investigated as a catalytic cathode for low temperature (LT) SOFCs. XRD analysis of the as-prepared material revealed the dominating BCCF perovskite structure as the main phase accompanied with cobalt and calcium oxides as the secondary phases resulting into an overall composite structure. Structure and morphology of the sample was observed by Field Emission Scanning Electron Microscope (FE-SEM). In particular, the Ba0.3Ca0.7Co0.8Fe0.2O3-δ (BCCF37) showed a maximum conductivity of 143 S cm−1 in air at 550 °C measured by DC 4 probe method. The BCCF at the optimized composition exhibited much higher electrical conductivities than the commercial Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) perovskite cathode material. A maximum power density of 325 mW cm−2 at 550 °C is achieved for the ceria-carbonate electrolyte fuel cell with BCCF37 as the cathode material.

Details

Original languageEnglish
Pages (from-to)385-391
JournalElectrochimica Acta
Volume178
Early online date3 Aug 2015
Publication statusPublished - 1 Oct 2015

Keywords

  • Composite cathode, perovskite oxide, BCCF37, low temperature, SOFC