Preparation and Property Evaluation of Co-Doped La0.8Sr0.2Ga0.8Mg0.2O3-partial derivative Electrolyte for IT- SOFC

Lee, Dokyol; Han, Ju-Hyeong

doi:10.1149/1.3597839

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Preparation and Property Evaluation of Co-Doped La0.8Sr0.2Ga0.8Mg0.2O3-partial derivative Electrolyte for IT- SOFC

Lee, Dokyol;
Han, Ju-Hyeong

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초록

Co doping was used to enhance the electrical conductivity of La0.8Sr0.2Ga0.8Mg0.2O3-partial derivative (LSGM). La0.8Sr0.2Ga0.8Mg0.2-xCoxO3-partial derivative (LSGMC) powders were synthesized using the glycine nitrate process for use as the electrolyte of solid oxide fuel cells. The powder X-ray diffraction patterns confirmed a single perovskite phase and the SEM images showed the dense grain microstructure of the sintered pellets. The electrical conductivity of LSGMC measured at 800 degrees C was observed to be 0.145 Scm(-1), which is higher than that of LSGM (0.127 Scm(-1)). In addition, the linear thermal expansion coefficient and chemical reaction were investigated. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3597839] All rights reserved.

키워드

crystal microstructure; ionic conductivity; lanthanum compounds; powder technology; powders; scanning electron microscopy; sintering; solid electrolytes; solid oxide fuel cells; strontium compounds; thermal expansion; X-ray diffraction; OXIDE-ION CONDUCTOR; PEROVSKITE-TYPE OXIDE; SOL-GEL SYNTHESIS; COMBUSTION SYNTHESIS; LAGAO3 PEROVSKITE; FUEL-CELLS; STRONTIUM; CERIA; CERAMICS

제목: Preparation and Property Evaluation of Co-Doped La0.8Sr0.2Ga0.8Mg0.2O3-partial derivative Electrolyte for IT- SOFC

저자: Lee, Dokyol; Han, Ju-Hyeong

DOI: 10.1149/1.3597839

발행일: 2011

유형: Article

저널명: Electrochemical and Solid-State Letters

권: 14

호: 9

페이지: B85 ~ B88