Doped Perovskite Oxide, PrMnO3, as a New Cathode for Solid-Oxide Fuel Cells that Decreases the Operating Temperature |
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| Authors: | Tatsumi Ishiham Takanari Kudo Hideaki Matsuda Yusaku Takita |
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| Affiliation: | Department of Applied Chemistry, Faculty of Engineering, Oita University, Dannoharu 700, Oita 870-11, Japan |
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| Abstract: | Cathodic overpotentials of Ln0.6Sr0.4MnO3 (Ln is La, Pr, Nd, Sm, Gd, Yb, and Y) were studied for a new cathode for solid-oxide fuel cells (SOFCs) with low overpotentials in a relatively-low-temperature region. Cathodic overpotentials strongly depended on the rare-earth cations in the A sites of the perovskite oxide. In particular, overpotentials of a Sr-doped PrMnO3 cathode maintained low values despite decreased operating temperature. Consequently, almost the same power density of a SOFC with Ln0.6Sr0.4MnO3 cathode was obtained at about 100 K lower operating temperature by using Sr-doped PrMnO3 as the cathode. |
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