|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Electrochemical Properties of (La,Sr)MnO3 for Interconnector Application
||Fen Qin, Hyun-Jong Choi, Sun-Dong Kim, Sang-Kuk Woo, Jung-Kun Lee
|On-Site Speaker (Planned)
Ceramics thick films which can be used for interconnectors or symmetric electrodes of solid oxide fuel cells have received a considerable amount of research interest. Since ceramics films are exposed to both hydrogen and oxygen at high temperature for these applications, materials are required to be electrically conductive and chemically stable in both reducing and oxidizing ambience. Though LaCrO3-based oxide of the perovskite structure is a popular ceramic interconnecting material, Cr evaporation is still an inherent problem. In this presentation, we will report Cr-free (La0.8Sr0.2)MnO3 (LSM) ceramics which are prepared using microwave – assisted synthesis method. Microstructure of LSM ceramics is controlled by changing pH of a precursor solution. Electric conductivity and redox stability of LSM ceramics are closely related to the microstructure of LSM ceramics. An increase in the grain size, in turn, increases the electric conductivity and reduces a dependence of the electric conductivity on oxygen partial pressure of ambience.