Journal Published Online: 06 October 2014
Volume 43, Issue 1

Ionic Conductivity of a Carbonate–Ion Conductor

CODEN: JTEVAB

Abstract

A systematic investigation on ionic conductivity of a carbonate–ion conductor has been reported. La0.8Sr0.2Ga0.83Mg0.17O2.815 (LSGM), LiKCO3 (MC), and LiNiO2 were prepared by solid–state reaction, respectively. A dual–phase LSGM and MC were mixed LSGM–MC. The effect of temperature on impedance spectra and effective ionic conductivity of LSGM–MC was investigated. The effect of electrode materials on impedance spectra was also investigated. The results showed that there was no solid reaction between LSGM, MC, and LiNiO2. As the physical state of MC transformed from solid state to liquid state, ionic conductivity of the carbonate–ion conductor was dependent on temperature. There was a significant difference for MC in three temperature range: t ≤ 460°C, 460°C < t < 486°C, and t ≥ 486°C. DTA analysis showed that temperatures of melting and solidification agree with those of ionic conductivity. Compared with Ag and LSGM–MC–LiNiO2, Au is a better cathode material.

Author Information

Liu, Tao
School of Materials & Metallurgy, Northeastern Univ., Shenyang, CN
Lin, Li
School of Materials & Metallurgy, Northeastern Univ., Shenyang, CN
Yu, Jingkun
School of Materials & Metallurgy, Northeastern Univ., Shenyang, CN
Pages: 7
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Stock #: JTE20130332
ISSN: 0090-3973
DOI: 10.1520/JTE20130332