Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Electrolyte Preparation and Characteristics of La1-xSrxMnO3 for Solid Oxide Fuel Cell

고체전해질형 연료전지용 전해질 제작 및 La1-xSrxMnO3의 특성에 관한 고찰

  • 임형렬 (한양대학교 공과대학 공업화학과) ;
  • 이주성 (한양대학교 공과대학 공업화학과)
  • Received : 1994.12.30
  • Accepted : 1995.11.27
  • Published : 1996.02.12
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Abstract

Solid oxide electrolytes of 8mol% YSZ($Y_2O_3$ stabilized zirconia) were prepared at various sintering conditions and their ionic conductivities were measured. The highest ionic conductivity of $10^{-1}S.cm^{-1}$ was obtained when the sintering temperature was 1400oC and the sintering time was 10hr. Also the cathode material, $La_{1-x}Sr_xMnO_3$ was prepared by solid state reaction method and the overpotential, electrical conductivity, and charge transfer resistance between cathode material and YSZ electrolyte were studied. It was found that the optimum doping content of Sr for La was 50mo1%.

고체전해질형 연료전지용 전해질로 사용되는 8mol% YSZ($Y_2O_3$ stabilized zirconia)의 소결조건을 변화시켜 이온전도도를 측정하였다. 그 결과 소결조건이 $1400^{\circ}C$, 10시간이었을 때 가장 높은 값인 $10^{-1}S.cm^{-1}$를 나타내었다. 또한 산소극재료로서 $La_{1-x}Sr_xMnO_3$($0{\leq}{\times}{\leq}1$)를 고상반응법으로 제조하여 과전압, 전자 전도도, 전해질인 YSZ와의 계면저항등을 살펴보았다. 그 결과 La에 대한 Sr의 치환량이 50mol%일 때 가장 우수한 특성을 나타내었다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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