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Ba 0.9 Co 0.7 Fe 0.2 Mo 0.1 O 3–δ : A Promising Single‐Phase Cathode for Low Temperature Solid Oxide Fuel Cells
Author(s) -
Huang Shouguo,
Lu Qiliang,
Feng Shuangjiu,
Li Guang,
Wang Chunchang
Publication year - 2011
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100497
Subject(s) - materials science , cathode , electrochemistry , oxide , oxygen , doping , dissociation (chemistry) , analytical chemistry (journal) , phase (matter) , electrode , optoelectronics , chemistry , metallurgy , organic chemistry , chromatography
Ba 0.9 Co 0.7 Fe 0.2 Mo 0.1 O 3–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 cm 2 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.