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Influence of Cu2+ doping concentration on the catalytic activity of CuxCo3-xO4 for rechargeable Li-O2 batteries

Abstract

The electrochemical performance of rechargeable lithium-oxygen (Li-O2) batteries is relied on the catalysts used in the cathode to a great extent. Herein, a series of CuxCo3-xO4 nanorods with different Cu2+ concentrations was prepared by a convenient hydrothermal method. Corresponding structures and electrochemistries were further characterized in order to reveal the composition effect of catalyst on catalytic activity. Experimental characterization and theoretical calculations indicate that more Cu2+ occupying Co2+ position and dispersing on catalyst surface has an enhanced catalytic activity in higher capacity, lower overpotential and better reversibility. It implies that suitable charge transfer from Li2O2 to catalyst plays an important role in improving electrochemical performance of Li-O2 batteries. The present study is helpful to design a highly active catalyst by tuning composition of catalyst surface.

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Publication details

The article was received on 27 Apr 2017, accepted on 17 Jul 2017 and first published on 17 Jul 2017


Article type: Paper
DOI: 10.1039/C7TA03615A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Influence of Cu2+ doping concentration on the catalytic activity of CuxCo3-xO4 for rechargeable Li-O2 batteries

    L. He, Y. Wang, F. Wang, S. Zhang, X. Wu, Z. Wen, J. Liu and W. Zhang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA03615A

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