• Electrical & Electronic Materials
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• v.9 no.9
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• pp.949-953
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• 1996

In this paper, the cathode materials of solid oxide fuel cell were fabricated, and the analysis of TG/DTA, XRD, thermal expansion and electric conductivity were investigated. As a result, thermal expansion coefficient of LSM was not quite different from that of electrolyte. And the performance of LSM(x=0.4) was more excellent than the others.

• 전기의세계
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• v.42 no.11
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• pp.7-13
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• 1993

SOFC는 기술수준이 타 연료전지에 비해 아직까지 요소기술개발 단계이며, 실용화를 위해서는 재료개발과 과제를 해결하여야 한다. 따라서 국내에서도 전기화학, 열역학, 전기공학, 요업공학 증 각분야의 전문갖들이 많은 노력을 기울인다면 세계적으로 초기연구개발 수준인 선진국 기술에 접근하리라 생각된다.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 1996.11a
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• pp.15-16
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• 1996

• 전기의세계
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• v.45 no.9
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• pp.31-36
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• 1996

본 보고에서는 고체전해질형 연료전지의 실용화를 위해서 필수적인 구성요소 개발에 관련되는 재료기술을 중심으로 소개하고자 한다.

• Electrical & Electronic Materials
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• v.10 no.6
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• pp.528-532
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• 1997

The research and development for the solid oxide fuel cell have been promoted rapidly and extensively in recent years, because of their high efficiency and future potential. Therefore this paper describes the manufacturing method and characteristics of anode electrode for SOFC, by the way, Ni-YSZ materials are used as anode of SOFC widely. So in this experiments, we investigated the optimum content of Ni, by testing expansion coefficient, impedance characteristics, overvoltage. As a result, the performance of Ni-YSZ anode(40vol%) was better excellent than the others.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1995.05a
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• pp.160-162
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• 1995

The research and development for the solid oxide fuel cells have been promoted rapidly and extensively In recent years. because of their high efficiency and future potential. The purpose of this research Is to Investigate the performance evaluation and unit cell fabrication for SOFC.

• 유체기계공업학회:학술대회논문집
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• 2001.11a
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• pp.354-360
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• 2001

Hybrid energy system of fuel cell and gas turbine is discussed as the system to be used in the distributed power generation. Discussion is first directed to the distributed power generation system which is expected to be more popularly introduced both in urban and isolated areas. In the next some characteristic features of fuel cell and micro gas turbine are shortly described. In the last discussion is turn to the fuel cell and micro gas turbine hybrid system. In particular, performance characteristics of a representative SOFC/MGT hybrid system are investigated through the concept design at various power capacity levels.

• Applied Chemistry for Engineering
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• v.7 no.1
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• pp.9-17
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• 1996

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%.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.04a
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• pp.160-163
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• 1997

The object of this study is to develop various composing material for SOFC generation system, and to test unit cell performance manufactured. So we try to present a guidance for developing mass power generation system. We concentrated on development of manufacturing process for cathode, anode and electrolyte.

• Applied Chemistry for Engineering
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• v.7 no.6
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• pp.1125-1131
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• 1996

Ca or Sr-doped $PrMnO_3$ were prepared for cathode material of solid oxide fuel cell. The characteristics such as the electrical conductivity and the cathodic overpotential were investigated as to doping contents. Also the reactivity with yttria stabilized zirconia of electrolyte, and the thermal expansion coefficient were studied. The prepared perovskite powder had the mean particle size of $2{\sim}5{\mu}m$, and the particle size and the surface area was out of relation to the doping content. When Ca doping amount of electrode material was 30mol%, the electrical conductivity was the highest value of $266S{\cdot}cm^{-1}$ at $1000^{\circ}C$, and also the polarization characteristics showed the best property. The reactivity between YSZ and Ca-doped $PrMnO_3$ at $1200^{\circ}C$ for 100hours was lower than that between YSZ and Sr-doped $PrMnO_3$. The thermal expansion coefficient of $Pr_{0.7}Ca_{0.3}MnO_3$ was $1.19{\times}10^{-5}K^{-1}$ in the temperature range of $300{\sim}1000^{\circ}C$, and this value was similar to that of YSZ, $1.15{\times}10^{-5}K^{-1}$.