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• W3137402572 endingPage "229778" @default.
• W3137402572 startingPage "229778" @default.
• W3137402572 abstract "Highly active cathode materials are crucial to accelerating the commercialization of intermediate-temperature solid oxide fuel cells (IT-SOFCs). Herein, a facile doping strategy is proposed to promote the electrode performance of simple perovskite oxides by introducing the lanthanide (Ln = La, Ce, and Pr) ions into B-site. These materials are evaluated as promising cathodes for IT-SOFCs and characterized by electrochemical test between 500 and 700 °C. Among all Ba 0.5 Sr 0.5 Co 0.7 Fe 0.28 Ln 0.02 O 3- δ perovskites, the Ba 0.5 Sr 0.5 Co 0.7 Fe 0.28 Pr 0.02 O 3- δ (BSCFP) cathode exhibits the lowest polarization resistance ( R p ) of 0.026 Ω cm 2 at 700 °C, approximately 50% lower than that of the pristine Ba 0.5 Sr 0.5 Co 0.7 Fe 0.3 O 3- δ (BSCF0.3). The BSCFP cathode-based fuel cell delivers a peak power density of 1083 mW cm −2 at 700 °C, along with exceptional operating stability for 150 h. Such performance may benefit from increased electrical conductivity and optimized surface oxygen process based on experiments and density-functional theory (DFT) calculations. The DFT calculations indicate that the Pr doping not only promotes the adsorption of oxygen species but also enhances the p-d hybridization of O 2p and Co/Fe/Pr 3d bands. The findings endow the performance modulation of the perovskite cathode systems involving the lanthanide doping at B-site. • B-site lanthanide-doped BSCFLn perovskite cathodes are systematically studied. • BSCFP cathode shows a polarization resistance of 0.026 Ω cm 2 . • BSCFP cathode-based fuel cell has a peak power density of 1083 mW cm −2 • Pr doping promotes oxygen adsorption and p-d band hybridization." @default.
• W3137402572 created "2021-03-29" @default.
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• W3137402572 date "2021-05-01" @default.
• W3137402572 modified "2023-10-16" @default.
• W3137402572 title "B-site La, Ce, and Pr-doped Ba0.5Sr0.5Co0.7Fe0.3O3- perovskite cathodes for intermediate-temperature solid oxide fuel cells: Effectively promoted oxygen reduction activity and operating stability" @default.
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• W3137402572 doi "https://doi.org/10.1016/j.jpowsour.2021.229778" @default.
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