Nickel-substituted Ba0.5Sr0.5Co0.8Fe0.2O3-δ: a highly active perovskite oxygen electrode for reduced-temperature solid oxide fuel cells

Lu Li, Hua Yang, Zhenghui Gao, Yaping Zhang, Feifei Dong, Guangming Yang, Meng Ni, Zhan Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

A key need for the advancement of high-performance solid oxide fuel cells (SOFCs) is to develop viable cathode materials with high electrocatalytic activity for the oxygen reduction reaction (ORR) at reduced operating temperatures below 700 °C. Here, we report a Ni-substituted perovskite composition Ba0.5Sr0.5Co0.7Fe0.2Ni0.1O3-δ (BSCFN) as a potential cathode material focusing on enhancing the electrochemical performance. Considerable attention is paid to the research of physicochemical properties primarily by crystal structure and oxygen transport measurements, with the aim to build up the correlation with the ORR activity. With the BSCFN cathode, a symmetrical cell achieves a very low area-specific polarization resistance of only ∼0.018 Ω cm2 and a single cell delivers a maximum power density as high as ∼1.8 W cm-2 at 650 °C. Such a large electrode performance improvement is attributed to the sustained cubic-symmetry perovskite structure and fast oxygen kinetics promoted by Ni substitution. The desirable ORR activity and durability highlight the potential of BSCFN as a highly promising oxygen electrode for reduced-temperature SOFCs.

Original languageEnglish
Pages (from-to)12343-12349
Number of pages7
JournalJournal of Materials Chemistry A
Volume7
Issue number19
DOIs
Publication statusPublished - Apr 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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