Abstract
Application of as a cathode material on electrolyte for reduced-temperature operation solid oxide fuel cells (SOFCs) was investigated in detail. As a protective layer for preventing the unfavorable solid-state reactions between materials, doped ceria thin films with an apparent density range between 50 and 80% were fabricated on the electrolyte by a cost-effective wet ceramic process using nanometer and submicrometer powders. The impact of doped ceria interlayers on the performance of cathode was investigated by X-ray diffraction and ac impedance measurements. It was found that controlling the microstructure of interlayers is important for cathodic performance. The cathode deposited on electrolyte coated by or interlayer can reach an interface conductivity of 4.4 or , respectively, at .
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