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Shouguo Huang, Qiliang Lu, Shuangjiu Feng, Guang Li and Chunchang Wang Ba0.9Co0.7Fe0.2Mo0.1O3–δ: A Promising Single-Phase Cathode for Low Temperature Solid Oxide Fuel Cells Advanced Energy Materials 1

Article first published online: 6 OCT 2011 | DOI: 10.1002/aenm.201100497

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Ba0.9Co0.7Fe0.2Mo0.1O3–δ (BCFN) is a promising candidate for cathodes in low temperature solid oxide fuel cells. The area specific resistances of the BCFM cathode are as low as 0.06 and 0.13 Ω cm2 at 600 and 550 °C. The maximum power densities are 1117 and 936 mWcm−2 at 600 and 550 °C. The Mo-doping in the BCFM creates a higher concentration of oxygen vacancies, and assists the electrochemical oxygen reduction via catalytic promotion of the dissociation and surface diffusion of oxygen species on the cathode to the three-phase boundaries, thereby significant improving the performance of the BCFM cathode.

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