Wide band gap conducting oxides electrolyte materials for intermediate temperature SOFCs. (March 2022)

• Record Type: Journal Article
• Authors: Shawuti, Shalima
• Is Part Of: Materials today communications. Volume 30(2022)
• Publication Date: 2022-03
• Subjects: Intermediate temperature solid oxide fuel cells -- Electrolyte -- Wide band gap -- Oxide semiconductors; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.103000
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: The research was mainly aimed at comparing the commonly used oxide semiconductor, ZnO, ZnGa2 O4 and CoGa2 O4, 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 °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 CoGa2 O4 pellets within the grain size range from 30 to 100 µm. Highlights: Comparing the commonly used oxide semiconductor, ZnO, ZnGa2 O4 and CoGa2 O4, as an electrolyte material. Intermediate temperature solid oxide fuel cells (IT-SOFCs). Understanding the ionic conductivity performance, relaxation times, ionic activation energies, and conductivity values. Among the analyzed oxide semiconductors, observing the highest ionic conductivity values for CoGa2 O4 pellets