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Issue 28, 2017
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Hierarchical NiCo2O4 nanosheets on carbon nanofiber films for high energy density and long-life Li–O2 batteries

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Abstract

Designing oxygen cathodes with both high energy density and excellent cycling stability is a great challenge in the development of lithium–oxygen (Li–O2) batteries for energy storage systems. Herein, we design a novel structure of hierarchical NiCo2O4 nanosheets on porous carbon nanofiber films (denoted as NiCo2O4@CNFs) as an oxygen cathode for lithium–oxygen batteries. The NiCo2O4@CNFs cathode delivers a high specific discharge capacity of 4179 mA h g−1, a high energy density of 2110 W h kg−1 and superior cycling stability over 350 cycles. The excellent electrochemical performance of the NiCo2O4@CNFs cathode can be attributed to the rational design and engineering of catalysts and porous conductive electrodes. These results indicate that the NiCo2O4@CNFs electrode is a promising candidate for high energy density and long-life Li–O2 batteries. Additionally, the rational design of the hierarchical catalyst constructed low-dimensional nanostructure and the lightweight porous carbon nanofiber electrode can be also used for other metal–oxygen batteries, such as zinc–oxygen (Zn–O2) batteries, aluminum–oxygen (Al–O2) batteries, and sodium–oxygen (Na–O2) batteries.

Graphical abstract: Hierarchical NiCo2O4 nanosheets on carbon nanofiber films for high energy density and long-life Li–O2 batteries

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Publication details

The article was received on 29 Apr 2017, accepted on 22 Jun 2017 and first published on 22 Jun 2017


Article type: Communication
DOI: 10.1039/C7TA03703A
Citation: J. Mater. Chem. A, 2017,5, 14530-14536
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    Hierarchical NiCo2O4 nanosheets on carbon nanofiber films for high energy density and long-life Li–O2 batteries

    G. Liu, L. Zhang, S. Wang, L. Ding and H. Wang, J. Mater. Chem. A, 2017, 5, 14530
    DOI: 10.1039/C7TA03703A

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