Ibrahim A. Amar, Abubaker Sharif, Mohammed M. Ahwidi
Abstract
The ionic conductivity of Ca-doped ceria (CDC)-carbonate nanocomposite electrolyte was
investigated. CDC powder with a composition of (Ce0.8Ca0.2O2-δ) was synthesised via a co-precipitation
method and used as the host phase. Ternary carbonate eutectic salt ((Li/Na/K)2CO3) was prepared by
solid state reaction and selected as the second phase. The CDC−carbonate composite was prepared by
mixing CDC and ternary carbonate powders at weight ratio of 80:20. The structure of CDC powder and
CDC−carbonate composite were characterised by X-ray powder diffraction (XRD).The ionic
conductivities of the composite electrolyte were measured by impedance spectroscopy (IS) within the
temperature range of 300−600 ºC in two different atmospheres (air and wet (3% H2O) 5% H2−Ar). The
ionic conductivity of the composite electrolyte was found to be 0.12−1.24 × 10−5, and 0.13−7.97 × 10−5
S cm−1 in air and wet 5% H2-Ar respectively.
Publication Date
9/13/2017
Publisher
Journal of Sebha University (Pure and Applied Sciences)
محمد مسعود | mohammed | 5287