Abstract

An anode support tubular SOFC is fabricated and the dependence of its polarization characteristics on anode microstructure parameters is investigated experimentally. Nickel yttria-stabilized zirconia (Ni-YSZ) anode supported cell with YSZ electrolyte, lanthanum-strontium-manganite (LSM)-YSZ composite cathode, and LSM cathode layers is fabricated by dip coating. High-resolution images of anode microstructure are successfully obtained by low voltage SEM-EDX and quantified by means of stereology. Cell voltage measurements and impedance spectroscopy are performed at temperatures of 650 and 750℃. A quantitative relationship between polarization characteristics and microstructure parameters such as three-phase boundary length and contiguity is investigated.

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