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Issue 14, 2011
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Nitrogen-doped graphene nanosheets with excellent lithium storage properties

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Abstract

In this work, nitrogen-doped graphene nanosheets serving as lithium storage materials are presented. The nitrogen-doped graphene nanosheets were prepared by heat treatment of graphite oxide under an ammonia atmosphere at 800 °C for 2 h. Scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy were employed to characterize the prepared product as nitrogen-doped graphene nanosheets with a doping level of ca. 2% nitrogen, where the N binding configuration of the graphene includes 57.4% pyridinic, 35.0% pyrrolic and 7.6% graphitic N atoms. Galvanostatic charge/discharge experiments revealed that these nitrogen-doped graphene nanosheets exhibited a high reversible capacity (900 mA h g−1 at 42 mA g−1 (1/20 C)), excellent rate performance (250 mA h g−1 at a current density of 2.1 A g−1 (2.5 C)), and significantly enhanced cycling stability, which demonstrated nitrogen-doped graphene nanosheets to be a promising candidate for anode materials in high rate lithium-ion batteries.

Graphical abstract: Nitrogen-doped graphene nanosheets with excellent lithium storage properties

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Publication details

The article was received on 05 Jan 2011, accepted on 09 Feb 2011 and first published on 28 Feb 2011


Article type: Paper
DOI: 10.1039/C1JM00049G
Citation: J. Mater. Chem., 2011,21, 5430-5434
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    Nitrogen-doped graphene nanosheets with excellent lithium storage properties

    H. Wang, C. Zhang, Z. Liu, L. Wang, P. Han, H. Xu, K. Zhang, S. Dong, J. Yao and G. Cui, J. Mater. Chem., 2011, 21, 5430
    DOI: 10.1039/C1JM00049G

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