The composite electrolyte with an insulation Sm2O3 and semiconductor NiO for advanced fuel cells

Research output: Contribution to journalArticle

Abstract

Novel Sm2O3−NiO composite was prepared as the functional electrolyte for the first time. The total electrical conductivity of Sm2O3−NiO is 0.38 S cm−1 in H2/air condition at 550 °C. High performance, e.g. 718 mW cm−2, was achieved using Sm2O3−NiO composite as an electrolyte of solid oxide fuel cells operated at 550 °C. The electrical properties and electrochemical performance are strongly depended on Sm2O3 and NiO constituent phase of the compositions. Notably, surprisingly high ionic conductivity and fuel cell performance are achieved using the composite system constituting with insulating Sm2O3 and intrinsic p-type conductive NiO with a low conductivity of 4 × 10−3 S cm−1. The interfacial ionic conduction between two phases is a dominating factor giving rise to significantly enhanced proton conduction. Fuel cell performance and further ionic conduction mechanisms are under investigation.

Details

Authors
  • Liang Liu
  • Yanyan Liu
  • Lingyao Li
  • Yan Wu
  • Manish Singh
  • Bin Zhu
Organisations
External organisations
  • China University of Geosciences
  • KTH Royal Institute of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Materials Chemistry

Keywords

  • Composite electrolyte, Interfacial ionic conduction, Proton conduction, Semiconductor-ionic fuel cells, SmO−NiO
Original languageEnglish
Pages (from-to)12739-12747
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number28
Early online date2018 Apr 22
Publication statusPublished - 2018 Jul
Publication categoryResearch
Peer-reviewedYes