(La,Sr)MnO₃+δ 합성에 있어서 출발물질에 따른 양극특성

이미재; 김세기; 지미정; 최병현; 박상선

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자료유형: 학술대회자료

저자정보: 이미재 김세기 지미정 최병현 박상선

저널정보: 한국신재생에너지학회 한국신·재생에너지학회 학술대회 초록집 한국신재생에너지학회 2006년도 추계학술대회

발행연도: 2006.11

수록면: 360 - 363 (4page)

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We synthesized (La,;Sr)MnO_{3+{delta} as a cathode for SOFC by glycine nitrate process(GNP) and knew the different properties of (La_{1-x}Sr_x)MnO₃ by using nitrate solution and oxide solution as starting material. In case of using nitrate solution as a starting material, main crystal phase peak of LaMnO₃ increased as Sr content added up and a peak of Sr₂MnO₄;and;La₂O₃ was showed as a secondary phase. We added Mn excess to control a crystal phase. In this case, the electrical conductivity had a high value 210.3S/cm at 700?C On the other side, when we used oxide solution as a starting material, we found main crystal phase of LnMnO₃ to increase as Sr content added up and a peak of La₂O₃ as a secondary phase. Similary, we added Mn excess to control a crystal phase in this case. We knew (La,;Sr)MnO₃ powder to sinter well and the electrical conductivity of the sintered body at 1200?C for 4hrs was 152.7s/cm at 700?C. The sintered (La,;Sr)MnO₃ powder at 1000?C for 4hrs got the deoxidization peak, depending on the temperature md in case of using nitrate solution as a start ing material the deoxidization peak was showed at 450?C which is lower than used a oxide solution as a starting material. As a result, when (La,;Sr)MnO₃ powder was synthesized to add Mn excess and to use nitrate solution as a starting material, we found it to have the higher deoxidization property and considered it as a cathode for m properly. And we found it to have different electrical conduct ivity the synthesized (La,;Sr)MnO₃ powder by using different start ing materials like nitrate solution and oxide solution which influence a sintering density and crystal phase.

#고체산화물 연료전지 #공기극 #출발물질 #연소합성법 #SOFC #GNP

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