Highly stable microtubular solid oxide fuel cells based on integrated electrolyte/anode hollow fiber

• 作 者: MENG Xiuxia YAN Wei YANG Naitao TAN Xiaoyao LIU Shaomin
• 机 构: School of Chemical Engineering,Shandong University of Technology,Zibo 255049,Shandong,China
• 出 处: 第一届全国储能科学与技术大会
• 发表日期: 2014年5期
• 关键词: integrated anode/electrolyte microtubular solid oxide fuel cell hollow fiber cer

　　The asymmetric YSZ hollow fibers have been prepared by a phase-inversion method, based on which, the integrated electrolyte/anode hollow fibers are fabricated via a vacuum-assisted impregnation of nickel nitrate.The weight content of NiO in the integrated hollow fibers enhances linearly from 0 to 42% with the impregnation cycles from 0 to 10.The porosity of the integrated electrolyte/anode hollow fibers decreases from 43% to 31% with the repeated impregnation and calcination of Ni catalyst.Its conductivity reaches up to 728 S/cm after 10 cycles of impregnation.And the mechanical strength of the integrated hollow fiber enhances from 128 to 156 MPa due to the increased NiO content.Based on the integrated electrolyte/anode hollow fibers, the prepared microtubular solid oxide fuel cells (MT-SOFCs) deliver a peak power density of 562 mW/cm2 after ten cycles of Ni impregnation.The cell stability has been verified in 40 thermal cycles with a steady OCV of 1.1V and stable power density around 560 mW/cm2 operated at 800 ℃.