標題: Metal-doped Pyrochlore as Novel Electrode Materials For Intermediate Temperature Solid Oxide Fuel Cell
作者: Hao, Chia-Kan
Lee, Chi-Shen
應用化學系
Department of Applied Chemistry
公開日期: 2013
摘要: In this study, the metal-doped La-2(Zr1-xWx)(2)O-7 (LWZO) pyrochlore phases were synthesized by Pechini sol-gel method and characterized by X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The phase width of tungsten is x = 0.1 - 0.15. Temperature-programmed reduction (TPR) shows that the as-prepared products are stable under hydrogen atmosphere. XPS measurements revealed the valence state of La3+, Zr4+, and W-(5+,W- 6+). The ionic- and electronic-conductivity of the 15% W-doped LWZO is 2.2x10(-3) to 1.9x10(-2) S/cm from 400 to 700 degrees C, which is better than YSZ and GDC over this temperature range. The LWZO is stable up to 1400 degrees C under reduced atmosphere. Bottom cells were fabricated with the LWZO electrolyte and GDC. The results shown that the La-2(Zr1-xWx)(2)O7+delta have a good potential of becoming the electrolyte for IT-SOFCs.
URI: http://hdl.handle.net/11536/23540
http://dx.doi.org/10.1149/05803.0165ecst
ISBN: 978-1-60768-448-0978-1-62332-094-2
ISSN: 1938-5862
DOI: 10.1149/05803.0165ecst
期刊: HIGH TEMPERATURE EXPERIMENTAL TECHNIQUES AND MEASUREMENTS
Volume: 58
Issue: 3
起始頁: 165
結束頁: 173
Appears in Collections:Conferences Paper


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