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Agglomerated film model 을 이용한 용융탄산염 연료전지용 perovskite 음극의 성능예측
임준혁,이병선,정하철,김윤성,위정호,전해수 ( Jun Heok Lim,Byung Sun Lee,Ha Chull Chung,Yun Sung Kim,Jung Ho Wee,Hai Soo Chun ) 한국공업화학회 1997 응용화학 Vol.1 No.1
A dual-porosity filmed agglomerate model for the porous cathode of the molten carbonate fuel has been investigated to predict the perovskite type cathode performance. The model predicts steady-state cell performance, given the above conditions that characterize the state of the perovskite electrode. Also, the effective surface area of electrode pore was obtained by mercury porosimeter. The results of the investigation are presented in the form of plots of overpotential vs. current density with varied the electrode material, gas composition and mechanism. The predicted polarization curves are compared with the empirical data from 1 ㎠ cell.
전해수,임준혁 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.1
용융탄산염 연료전지의 산소전극 대체가능물질로 페로브스카이트 화합물[La₁, _xSr_xCoO₃(x=0, 0.2. 0.4), La_(0.8)Sr_(0.2)CuO₃]을 선정하고 citrate sol-gel법과 EDTA sol-gel법을 이용하여 제조하고 물성, 전기전도도 및 전해질(Li/K=62/38 mole%, 650℃)에 대한 용해도를 제조방법, 온도, Sr 치환량에 대하여 실험하였다. 전해질에 대한 페로브스카이트 전극재료의 용해도는 Sr환량, 소결시간이 증가함에 따라 증가하였다. 페로브스카이트 전극의 전기전도도는 Sr의 치환량에 따라 증가하였고 NiO 전극과 비교하여 선택한 페로브스카이트 모두가 높은 값을 보였다. The perovskite compounds[La₁, _xSr_xCoO₃(x=0, 0.2. 0.4), La_(0.8)Sr_(0.2)CuO₃] were selected as the possible altemate 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.