Wide band gap conducting oxides electrolyte materials for intermediate temperature SOFCs

Shawuti S.

MATERIALS TODAY COMMUNICATIONS, vol.30, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30
  • Publication Date: 2022
  • Doi Number: 10.1016/j.mtcomm.2021.103000
  • Journal Name: MATERIALS TODAY COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Keywords: Intermediate temperature solid oxide fuel cells, Electrolyte, Wide band gap, Oxide semiconductors, FUEL-CELL, IMPEDANCE, SEMICONDUCTORS, COMPOSITE, COGA2O4, CATHODE, ENERGY
  • Istanbul University Affiliated: No

Abstract

The research was mainly aimed at comparing the commonly used oxide semiconductor, ZnO, ZnGa2O4 and CoGa2O4, as an electrolyte material suitable for intermediate temperature solid oxide fuel cells (IT-SOFCs). Understanding the ionic conductivity performance of oxide semiconductors was evaluated by Cole-Cole plots in the temperature range of 25 and 700 degrees C. In addition, relaxation times, ionic activation energies, and conductivity values were calculated from Cole-Cole curves. Among the oxide semiconductors, the highest conductivity values were found for CoGa2O4 pellets within the grain size range from 30 to 100 mu m.