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Facile synthesis of N,O-codoped hard carbon on the kilogram scale for fast capacitive sodium storage

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Abstract

Hard carbon has been identified as a promising anode material for sodium-ion batteries (SIBs). Herein, a facile self-templating strategy has been developed for the kilogram-scale preparation of N,O-codoped hierarchical porous hard carbon cuttlefish-like nanowire bundles (denoted as NOHPHC cuttlefishes). The unique nanoarchitecture leads to ultrafast pseudocapacitive sodium storage, excellent reversibility, and negligible degradation of the host material. NOHPHC delivers a high reversible capacity of 184 mA h g−1 at 0.5 A g−1, which is maintained at 114 mA h g−1 at 5 A g−1 for over 30 000 cycles, as well as exceptional rate capability of up to 20 A g−1 with a capacity of approximately 100 mA h g−1. Importantly, samples prepared before and after kilogram scaling are comparable in performance. Coupled with a Na3V2(PO4)3/C cathode, a full cell successfully obtains a high energy density of 52.6 W h kg−1 at 50 W kg−1 and 34 W h kg−1 at 1.4 kW kg−1.

Graphical abstract: Facile synthesis of N,O-codoped hard carbon on the kilogram scale for fast capacitive sodium storage

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Publication details

The article was received on 27 Jun 2018, accepted on 29 Jul 2018 and first published on 01 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA06160B
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Facile synthesis of N,O-codoped hard carbon on the kilogram scale for fast capacitive sodium storage

    M. Huang, B. Xi, Z. Feng, J. Liu, J. Feng, Y. Qian and S. Xiong, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA06160B

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