| 학회 |
한국재료학회 |
| 학술대회 |
2010년 봄 (05/13 ~ 05/14, 삼척 팰리스 호텔) |
| 권호 |
16권 1호 |
| 발표분야 |
C. Energy and the Environment(에너지 및 환경재료) |
| 제목 |
Composite cathode for IT-SOFC: Sr-doped lanthanum cuprate and Gd-doped ceria |
| 초록 |
The composite cathodes of K2NiF4-type crystal structure of x wt.% Ce0.9Gd0.1O1.95 (CGO)-(100-x)wt.% La1.96Sr0.04CuO4+δ (LSC), where x= 0, 10, 20 and 30, were synthesized via a citrate combustion method followed by an organic precipitant method. The individual structural phases of the composite cathodes were characterized using a third-generation synchrotron source beamline powder X-ray diffractometer (XRD). Porous grain morphology of CGO-LSC cathode composite of the symmetrical half-cell was recognized from the cross-sectional scanning electron microscopy images and the elemental line profiles. The composite cathode of 20wt.%CGO-80wt.%LSC (CL20-80) coated on Ce0.9Gd0.1O1.95 electrolyte showed a lowest area specific resistance (ASR) i.e., 0.07 Ωcm2 at 750ºC. An electrolyte supported (300μm thick) single-cell configuration of CL20-80/CGO/Ni-CGO attained a maximum power density of 626mWcm-2 at 700oC. The unique composite composition of CL20-80 demonstrates enhanced electrochemical performance and good chemical compatibility with CGO electrolyte compared with their pristine LSC cathode for IT-SOFCs. |
| 저자 |
Seung Jun Lee, P. Muralidharan, Seung Hwan Jo, Do Kyung Kim
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| 소속 |
KAIST |
| 키워드 |
Cathode; Citrate combustion synthesis; La1.96Sr0.04CuO4; Electrochemical performance; IT-SOFCs |
| E-Mail |
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