标题：Microstructure and Performance of Anode for Microtubular Solid Oxide Fuel Cells
作者：Yang Nai-Tao; Shen Yi-Chi; Yan Wei; Meng Xiu-Xia; Tan Xiao-Yao; Ma Zi-Feng
作者机构：[Yang Nai-Tao; Shen Yi-Chi; Yan Wei; Meng Xiu-Xia] Shandong Univ Technol, Sch Chem Engn, Zibo 255049, Peoples R China.; [Tan Xiao-Yao] Tianjin Polyt 更多
通讯作者地址：[Yang, NT]Shandong Univ Technol, Sch Chem Engn, Zibo 255049, Peoples R China.
来源：JOURNAL OF INORGANIC MATERIALS
关键词：microtubular solid oxide fuel cell; hollow fiber; anode microstructure;; concentration polarization
摘要：NiO-YSZ hollow fibers were fabricated via a phase-inversion spinning technique. An YSZ electrolyte film was dip-coated on the outer surface of the fiber and then co-sintered at 1450 degrees C to form electrolyte/anode hollow fiber half cell. The microstructure of the NiO-YSZ anode was modulated by controlling NMP/ethanol ratio of the inner coagulant during spinning process. Experimental results showed that, with the 1-Methy 1-2-Pyrrolidinone (NMP) content increase from 0 to 30wt%, 50wt%, 70wt% and 100wt%, the microscopy of the anode hollow fibers evolved from a sandwiched structure, i.e. finger-like pore/sponge voids/finger-like pore morphology, to a finger-pore-penetrating structure, leading to porosity increase of the anode. Meanwhile, gas tightness of YSZ electrolyte film, mechanical strength of the reduced dual-layer hollow fibers, and conductivity of anode could decrease. Microtubular fuel cells were fabricated by coating a porous Ag cathode onto the dense YSZ electrolyte film. The concentration polarization in the H-2/air cell decreased with increasing the length of the finger-like pores. The microtubular SOFC made from the anode hollow fibers with 70wt% of NMP-ethanol as the inner coagulant demonstrated the minimum polarization resistance and the highest output performance with 662 mW/cm(2)power density.