کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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180166 | 459372 | 2010 | 4 صفحه PDF | دانلود رایگان |
Composite cathodes were synthesized via a citrate combustion method followed by an organic precipitation method. The cathodes were of K2NiF4-type crystal structure with x wt.% Ce0.9Gd0.1O1.95 (CGO)–(100 − x) wt.% La1.96Sr0.04CuO4 + δ (LSC), where x = 0, 10, 20 and 30. The individual structural phases of the composite cathodes were characterized using a third-generation synchrotron source beamline powder X-ray diffractometer (XRD). The porous grain morphology of the CGO–LSC cathode composite for a symmetrical half-cell was determined from cross-sectional scanning electron microscopy images and elemental line profiles. The composite cathode was made of 20 wt.% CGO–80 wt.% LSC (CL20–80) and was coated onto a Ce0.9Gd0.1O1.95 electrolyte. It showed the lowest area specific resistance (ASR) of 0.07 Ω cm2 at 750 °C. An electrolyte-supported (300 μm thick) single-cell configuration of CL20–80/CGO/Ni-CGO attained a maximum power density of 626 mW cm− 2 at 700 °C. The unique composite composition of CL20–80 demonstrates enhanced electrochemical performance and good chemical compatibility with the CGO electrolyte, as compared with the pure LSC (CL0–100) cathode for IT-SOFCs.
Journal: Electrochemistry Communications - Volume 12, Issue 6, June 2010, Pages 808–811