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Nitrogen-rich sandwich-like carbon nanosheets as anodes with superior lithium storage properties

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Abstract

Carbon materials such as graphite have been used as anode material for Li-ion batteries (LIBs). However, the energy stored in carbon materials is greatly dependent on their structural characteristics. Herein, nitrogen-rich sandwich-like carbon nanosheets (NSCN) have been prepared through a facile hydrothermal carbonization (HTC) method followed by pyrolysis. The nitrogen-rich sandwich-like carbon nanosheets synthesized at 600 °C (NSCN-600) have a higher specific surface area of 1112 m2 g−1 and a total nitrogen content of 11.4 wt% (therein 9.30 wt% for both pyridinic-N and pyrrolic-N), giving rise to high discharge capacity (910 mA h g−1 at 100 mA g−1 after 50 cycles) and remarkable rate capability (719 mA h g−1 at 500 mA g−1 after 200 cycles and 390 mA h g−1 at 2000 mA g−1). Such desirable electrochemical properties could be attributed to the unique sandwich-like nanostructures consisting of a number of amorphous carbon nanoparticles closely covered with carbon sheet layers. Such a simple preparation method could provide a strategy for rational engineering of nanostructured nitrogen-rich carbonaceous materials for high-performance LIBs.

Graphical abstract: Nitrogen-rich sandwich-like carbon nanosheets as anodes with superior lithium storage properties

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Publication details

The article was received on 14 Sep 2017, accepted on 13 Nov 2017 and first published on 13 Nov 2017


Article type: Research Article
DOI: 10.1039/C7QI00567A
Citation: Inorg. Chem. Front., 2018, Advance Article
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    Nitrogen-rich sandwich-like carbon nanosheets as anodes with superior lithium storage properties

    H. Chu, C. Shao, S. Qiu, Y. Zou, C. Xiang, F. Xu and L. Sun, Inorg. Chem. Front., 2018, Advance Article , DOI: 10.1039/C7QI00567A

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