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Issue 6, 2016
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A Co3O4@MnO2/Ni nanocomposite as a carbon- and binder-free cathode for rechargeable Li–O2 batteries

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Abstract

Rational design and synthesis of cathode catalysts are crucial for enhancing the performance of rechargeable Li–O2 batteries. Here, we report a controlled synthesis of the nanocomposite, Co3O4 nanohorns coated with MnO2 nanosheets on a Ni foam (Co3O4@MnO2/Ni). It integrates the catalytic activities of oxygen reduction and oxygen evolution reactions and functions as a carbon- and binder-free cathode catalyst for rechargeable Li–O2 batteries. This nanocomposite catalyst presents a small discharge/charge voltage gap of 0.76 V (a low polarization) and a long cycle life of 170 cycles at 300 mA g−1, coupled with an ionic liquid-based electrolyte, 0.5 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (EMITFSI), which are much better than those based on the individual Co3O4 and MnO2 cathodes. The enhanced electrochemical performance is ascribed to the integrated bifunctional catalytic activities and the porous micro/nanostructure of the Co3O4@MnO2/Ni nanocomposite, as well as the ionic liquid-based electrolyte, indicating its promising application in rechargeable Li–O2 batteries.

Graphical abstract: A Co3O4@MnO2/Ni nanocomposite as a carbon- and binder-free cathode for rechargeable Li–O2 batteries

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Publication details

The article was received on 16 Mar 2016, accepted on 11 Apr 2016 and first published on 11 Apr 2016


Article type: Research Article
DOI: 10.1039/C6QI00066E
Citation: Inorg. Chem. Front., 2016,3, 866-871
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    A Co3O4@MnO2/Ni nanocomposite as a carbon- and binder-free cathode for rechargeable Li–O2 batteries

    X. Han, F. Cheng, C. Chen, F. Li and J. Chen, Inorg. Chem. Front., 2016, 3, 866
    DOI: 10.1039/C6QI00066E

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