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HWAHAK KONGHAK,
Vol.35, No.1, 1-7, 1997
Vol.35, No.1, 1-7, 1997
용융탄산염 연료전지용 Perovskite 전극에 대한 연구 1. 제조방법, 전기전도도 및 용해도
A Study of Perovskite Cathode for Molten Carbonate Fuel Cell
1. Preparation Process, Electric Conductivity and Solubility
1. Preparation Process, Electric Conductivity and Solubility
용융탄산염 연료전지의 산소전극 대체가능물질로 페로브스카이트 화합물[La1-xSrxCoO3(x=0, 0.2, 0.4), La0.8Sr0.2CuO3]을 선정하고 citrate sol-gel법과 EDTA sol-gel법을 이용하여 제조하고 물성, 전기전도도 및 전해질(Li/K=62/38mole%, 650℃)에 대한 용해도를 제조방법, 온도, Sr 치환량에 대하여 실험하였다. 전해질에 대한 페로브스카이트 전극재료의 용해도는 Sr치환량, 소결시간이 증가함에 따라 증가하였다. 페로브스카이트 전극의 전기전도도는 Sr의 치환량에 따라 증가하였고 NiO 전극과 비교하여 선택한 페로브스카이트 모두가 높은 값을 보였다.
The peroviskite compounds[La1-xSrxCoO3(x=0, 0.2, 0.4), La0.8Sr0.2CuO3] were selected as the possible alternate materials for the MCFC cathode and were synthesized by the citric acid and the ethylendiaminetetraacetic acid(EDTA) sol-gel methods. Those equilibrium solubilities were investigated in molten Li/K(=62/38 mole%) carbonates at 650℃. And the conductivity of perovskite at high temperature was measured. With increasing Sr contents, the solubility and conductivity of perovskite cathodes were increased. With increasing sintering time, the solubility was decreased.
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