Abstract
Due to the limitations of single material, the oxygen reduction kinetics may be slow, which is considered as a key challenge for developing the high-performance cathodes. In this work, an effective strategy is proposed, employing the in-situ solvothermal method, in which the LSCF, one of the most promising cathode materials, is decorated with Co3O4. After being treated at 180 °C in a neutral solution, the Rp of N-Co3O4 @LSCF electrode is decreased by 37%, exhibiting reasonable stability for 120 h. Utilizing the DRT technique, finding the decorated Co3O4 mainly promotes the charge transfer and oxygen dissociation processes. The single cell with the N-Co3O4 @LSCF cathode achieves a maximum power density of 803 mW cm-2 at 750 °C, which is 25% higher than that for the untreated LSCF electrode. Our work demonstrates that such Co3O4 decorated composite obtained by the in-situ solvothermal treatment is a promising cathode material for solid oxide fuel cells.
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