NDLI: Carbon-coated SnO<sub>2</sub>@C with hierarchically porous structures and graphite layers inside for a high-performance lithium-ion battery

Content Provider	Royal Society of Chemistry (RSC)
Author	Guo, Zaiping Li, Yao Liu, Qinglei Chen, Zhixin Feng, Chuanliang Zhu, Shenmin Gu, Jiajun Zhang, Di Moon, Won-Jin
Copyright Year	2012
Abstract	A high-performance anode material was prepared from a hierarchically structured activated carbon which contains in situgraphene and nano-graphite. The activated carbon was immersed in a solution of SnCl2·2H2O and subjected to ultrasound. As a result, nanoparticles of SnO2 were uniformly deposited on the surface of the activated carbon. The composite material was then coated with a thin layer of carbon by soaking it in a sucrose solution, followed by carbonization of the adsorbed sucrose at 500 °C. The resulting composite showed an outstanding high-rate cycling performance that can deliver an initial discharge capacity of 1417 mAh g−1 and maintain a discharge capacity of more than 400 mAh g−1 after 100 cycles at a high current density of 1000 mA g−1. This outstanding electrochemical performance is likely to be related to a unique combination of the excellent electrical conductivity of the activated carbon with graphite layers formed inside, its hierarchical pore structure which enhances lithium-ion transportation, and the carbon coating which alleviates the effects of volume changes, shortens the distance for Li+ diffusion, facilitates the transmission of electrons, and keeps the structure stable.
Starting Page	2766
Ending Page	2773
Page Count	8
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	6
Journal	Journal of Materials Chemistry
DOI	10.1039/c1jm14290a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Li Anode Activated carbon Tin(II) chloride Ultrasound Composite material Carbon Sucrose Carbonization Ampere-hour Electric current Electrochemistry Electrical resistivity and conductivity Graphite Lithium-ion battery Diffusion
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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