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Ultrasonic spray pyrolysis assisted by an electrostatic field was used to deposit thick Sm 0.5 Sr 0.5 CoO 3 (SSC) films (>40μm) as solid oxide fuel cell (SOFC) cathodes with a unique porous columnar structure. The high porosity and great thickness provided many active sites for reduction reaction. The space between columns, as well as the large pores (∼100nm) inside the...
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