Issue 28, 2014

Lithium reaction mechanism and high rate capability of VS4–graphene nanocomposite as an anode material for lithium batteries

Abstract

A graphene-attached VS4 composite prepared by a simple hydrothermal method is studied in terms of its lithium reaction mechanism and high rate capability. The nanocomposite exhibits a good cycling stability and an impressive high-rate capability for lithium storage, delivering a comparable capacity of 630 and 314 mA h g−1, even at high rates of 10 and 20 C (=10 and 20 A g−1, or 10 and 20 mA cm−2), respectively. In addition, full-cell (LiMn2O4/VS4–graphene) test results also exhibited a good capacity retention. The mechanism of Li storage is systematically studied and a conversion reaction with an irreversible phase change during the initial discharge–charge process is proposed.

Graphical abstract: Lithium reaction mechanism and high rate capability of VS4–graphene nanocomposite as an anode material for lithium batteries

Supplementary files

Article information

Article type
Paper
Submitted
22 ጃንዩ 2014
Accepted
05 ማርች 2014
First published
05 ማርች 2014

J. Mater. Chem. A, 2014,2, 10847-10853

Author version available

Lithium reaction mechanism and high rate capability of VS4–graphene nanocomposite as an anode material for lithium batteries

X. Xu, S. Jeong, C. S. Rout, P. Oh, M. Ko, H. Kim, M. G. Kim, R. Cao, H. S. Shin and J. Cho, J. Mater. Chem. A, 2014, 2, 10847 DOI: 10.1039/C4TA00371C

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