A novel anode-supported stable BaCe(0.7)Ta(0.1)Y(0.2)O(3-) (delta) membrane prepared by all-solid-state process for solid oxide fuel cells

作者：Yan Ruiqiang^*; Wang Qingfeng; Chen Guihua; Xie Kui

来源：Ionics, 2009, 15(4): 483-486.

DOI：10.1007/s11581-008-0297-x

• SOFC
• BaCeO(3)
• Stable
• Conductivity
• Thin membrane
• Proton conductors

BaCe(0.7)Ta(0.1)Y(0.2)O(3-) (delta) (BCTY) and BaCe(0.8)Y(0.2)O(3-) (delta) (BCY) were synthesized by solid-state reaction method at 1,300 A degrees C for 20 h. After being exposed in 3% CO(2) + 3% H(2)O + 94% N(2) at 700 A degrees C for 20 h, the BCTY exhibited adequate chemical stability against carbonations while BCY decomposed into BaCO(3) and CeO(2). The BCTY showed the similar thermal expansion behavior to BCY from room temperature to 1,000 A degrees C in air. The BCTY displayed a conductivity of 0.007 S/cm at 700 A degrees C in humid hydrogen, lower than that of BCY (0.009 S/cm). A fuel cell with 10-mu m thick BCTY membrane prepared through an all-solid-state process exhibited 1.004 V for OCV, 330 mW/cm(2) for maximum output at 700 A degrees C, respectively. Short-term test shows that the fuel cell performance does not degrade after 20 h.

• 出版日期2009-8
• 单位台州学院; 中国科学技术大学