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Mesoporous Single-Crystalline MnOx Nanofibers@Graphene for Ultra-High Rate and Long-Life Lithium-Ion Battery Anodes

Abstract

With the increasing energy demands for electronic devices and electrical vehicles, the achievements of anode materials for lithium-ion batteries with high specific capacity, superior rate capability and cycling stability still remain a challenge. Herein, we report a novel strategy to prepare the core-shell mesoporous single-crystalline MnOx nanofibers@graphene (PSCMnOx@G) through “spraying-rapid freezing” process. The elastic graphene shell not only improves the conductivity of electrode but also can substantially inhibit the collapse of MnOx nanofibers (NFs) over continuous discharge-charge cycles. Moreover, the double-exchange interaction of manganese mixed-valence further improves the conductivity of manganese oxide, and Li ion diffusion is significantly enhanced by vertically aligned single-crystalline and mesoporous structure of MnOx NFs. As a result, the PSCMnOx@G exhibits ultrahigh rate performance (1072 mA h g-1 at 0.1 A g-1, 419 mA h g-1 at 10 A g-1), among the best ever reported for MnOx based anodes, as well as excellent cycling stability (1162 mA h g-1 at 2 A g-1 over 500 cycles).

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Publication details

The article was received on 28 Sep 2018, accepted on 05 Nov 2018 and first published on 06 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA09394F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Mesoporous Single-Crystalline MnOx Nanofibers@Graphene for Ultra-High Rate and Long-Life Lithium-Ion Battery Anodes

    C. Xu, Z. Liu, T. Wei, L. Sheng, L. Zhang, L. Chen, Q. Zhou, Z. Jiang, L. Wang and Z. Fan, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA09394F

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