☆ 4.6 Article

Nitrogen-doped carbon-encapsulated SnO2-SnS/graphene sheets with improved anodic performance in lithium ion batteries

JOURNAL OF MATERIALS CHEMISTRY A (2015)

期刊

JOURNAL OF MATERIALS CHEMISTRY A

卷 3, 期 47, 页码 24148-24154

出版社

ROYAL SOC CHEMISTRY

DOI: 10.1039/c5ta06617d

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类别

Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary

资金

973 Program of China [2012CB933404, 2014CB239701]
Natural Science Foundation of China [21320102006, 61235007, 61575121, 21572132, 21372155]
MPI-SJTU Partner Group Project for Polymer Chemistry of Graphene Nanoribbons
ERC
EC [CNECT-ICT-604391]

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摘要

A dual-doping approach for nitrogen-doped carbon-coated SnO2-SnS/graphene nanosheets (NC@SnO2-SnS/GN) has been developed, using hydrothermal carbonization of sucrose with SnO2-decorated graphene and ammonium thiocyanate and a subsequent thermal treatment. The resulting hybrid manifests a typical two-dimensional core-shell architecture, with a N-doped carbon coating over the SnS- and SnO2-decorated graphene nanosheets. Used as the anode material in lithium ion batteries (LIBs), N-C@SnO2-SnS/GN delivers a high specific capacity of 1236 mA h g(-1) at a current density of 0.1 A g(-1) after 110 cycles, which outperforms most state-of-the-art tin-based LIB anodes with core-shell structures.

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