Metal-doped pyrochlore as novel electrode materials for intermediate temperature solid oxide fuel cell

Chia Kan Hao, Chi-Shen Lee*

*Corresponding author for this work

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

In this study, the metal-doped La2(Zr1-xW x)2O7 (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+, 6+). The ionic- and electronic- conductivity of the 15% W-doped LWZO is 2.2×10-3 to 1.9×10-2 S/cm from 400 to 700 °C, which is better than YSZ and GDC over this temperature range. The LWZO is stable up to 1400 °C under reduced atmosphere. Bottom cells were fabricated with the LWZO electrolyte and GDC. The results shown that the La 2(Zr1-xWx)2O7+δ have a good potential of becoming the electrolyte for IT-SOFCs.

原文English
頁(從 - 到)165-173
頁數9
期刊ECS Transactions
58
發行號3
DOIs
出版狀態Published - 1 一月 2013

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