| 학회 |
한국재료학회 |
| 학술대회 |
2010년 가을 (11/11 ~ 11/12, 무주리조트) |
| 권호 |
16권 2호 |
| 발표분야 |
C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 |
Assessment of electrochemical performance and thermal compatibility of Fe and Cu doped SmBaCo2O5+δ - CGO composite cathode for IT-SOFCs |
| 초록 |
Fe and Cu doped SmBaCo2O5+δ (FC-SBCO) - Ce0.9Gd0.1O1.95 (CGO) composites with various CGO contents (0-40 wt.%) have been investigated for potential cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). The effect of CGO incorporation on the thermal expansion coefficient (TEC), electrochemical performance and microstructure of the FC-SBCO - CGO composite cathodes are investigated. The thermal expansion behavior shows that the TEC values of FC-GBCO cathode decreases with CGO addition. The TEC of 30 wt.% CGO - 70 wt.% FC-SBCO (CS30) cathode shows 14.1 × 10-6 ºC-1 up to 900 ºC, which is lower value than pristine FC-SBCO (16.6 × 10-6 ºC-1). In addition, the addition of CGO to FC-SBCO cathode improves remarkably the electrochemical performance. The composite cathode of 30 wt.% CGO - 70 wt.% FC-SBCO (CS30) coated on Ce0.9Gd0.1O1.95 electrolyte shows the lowest polarization resistance (0.024 Ωcm2 at 750 ºC). An electrolyte-supported (300 μm thick) single-cell configuration of CG30/CGO/Ni-CGO attains a maximum power density of 783 mWcm-2 at 800 ºC, respectively. The results indicate that 30 wt.% CGO - 70 wt.% FC-SBCO cathode is promising cathode material for IT-SOFCs. |
| 저자 |
이승준, 김동석, 김도경
|
| 소속 |
카이스트 신소재공학과 |
| 키워드 |
Solid oxide fuel cells; Composite cathode; Electrochemical performance
|
| E-Mail |
|
