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Issue 43, 2016
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Hierarchical three-dimensional MnO nanorods/carbon anodes for ultralong-life lithium-ion batteries

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Abstract

MnO anode materials with high energy densities for lithium-ion batteries (LIBs) face significant challenges in avoiding inferior reversible capacity and fast capacity fading. Here we demonstrate a facile and scalable approach to realizing excellent performance, overcoming such disadvantages. A well-connected three-dimensional (3D) hierarchical porous-conducting framework, consisting of MnO nanorods conformally encapsulated by a nitrogen-doped carbon network, was synthesized via an in situ polymerization of polyaniline into manganese dioxide along with thermal calcination. Such a structure possesses a continuous electrically conductive carbon network with porous spaces for volume expansion of MnO rods, and the carbon coating on the nanorods further alleviates pulverization and self-aggregation of the active materials. As an anode, it demonstrates a reversible capacity as high as 798.6 mA h g−1 after 5 cycles at 50 mA g−1, beyond the theoretical capacity of MnO, and an extremely stable cycle life of 3000 cycles with ∼95% capacity retention, even at a high current density of 4000 mA g−1. Significantly, the electrochemical behavior of this novel material was also probed by an in situ XRD technique.

Graphical abstract: Hierarchical three-dimensional MnO nanorods/carbon anodes for ultralong-life lithium-ion batteries

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Publication details

The article was received on 13 Aug 2016, accepted on 03 Oct 2016 and first published on 03 Oct 2016


Article type: Paper
DOI: 10.1039/C6TA06933A
Citation: J. Mater. Chem. A, 2016,4, 16936-16945
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    Hierarchical three-dimensional MnO nanorods/carbon anodes for ultralong-life lithium-ion batteries

    W. Zhang, J. Sheng, J. Zhang, T. He, L. Hu, R. Wang, L. Mai and S. Mu, J. Mater. Chem. A, 2016, 4, 16936
    DOI: 10.1039/C6TA06933A

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