| 고체산화물 연료전지의 양극재료로서 Gd1-xSrxMnO3의 합성 및 특성평가 |
| 윤희성, 최승우1, 김병호1 |
고려대학교 재료공학부
1고려대학교 재료공학과 |
| Synthesis and Characterization of Gd1-xSrxMnO3 as Cathodic Material for Solid Oxide Fuel Cell |
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| ABSTRACT |
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Gd1-xSrxMnO3(0$leq$X$leq$0.6) as the cathode for solid oxide fuel cell was synthesized by citrate process and studied for its crystal structure, electrical conductivity, thermal expansion coefficient (TEC), and investigated reactivity with 8 mol% yttria stabilized zirconia(8YSZ) or Ce0.8Gd0.2O1.9 (CGO). The crystal structure of Gd1-xSrxMnO3 changed from orthorhombic (0$leq$X$leq$0.3) through cubic (0.4$leq$X$leq$0.5) to tetragonal structure (X=0.6). When Sr contents was increased, the electrical conductivity of Gd1-xSrxMnO3 was inthose of La1-xSrxMnO3, 8YSZ and CGO if Sr content was above 30mol%. TEC of Gd1-xSrxMnO3 was increased with Sr content. After heat treatment at 1300$^{circ}C$ for 48 hours, reaction product of Gd1-xSrxMnO3 and 8YSZ was SrZrO3. However CGO had no reaction product with Gd1-xSrxMnO3. |
| Key words:
Solid oxide fuel cell, Gd1-xSrxMnO3, Perovskite, Cathode |
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