Issue 36, 2013

Self-assembled V2O5nanosheets/reduced graphene oxide hierarchical nanocomposite as a high-performance cathode material for lithium ion batteries

Abstract

A simple solvothermal method was used to prepare self-assembled V2O5 nanosheets/reduced graphene oxide (RGO) hierarchical nanocomposite. In this nanocomposite, the V2O5 nanosheets assembling on the RGO constitute a 3-D hierarchical nanostructure with high specific surface area and good electronic/ionic conducting path. When used as the cathode materials, the V2O5 nanosheets/RGO nanocomposites exhibit highly reversible capacity and good rate capability relative to the bulk material. The V2O5 nanosheets/RGO nanocomposite anode was able to charge/discharge at high current densities of 3000 mA g−1 (10 C), 6000 mA g−1 (20 C) and 15 A g−1 (50 C), with discharge capacities of approximately 138, 112 and 76 mA h g−1, respectively. Meanwhile, a discharge capacity of 102 mA h g−1 can be delivered after 160 cycles at 2 C, showing a good cycling stability. The improved performance could be attributed to the enhanced electron transport and Li+ diffusion that results from the hierarchical nanostructure of V2O5 nanosheets/RGO nanocomposites.

Graphical abstract: Self-assembled V2O5 nanosheets/reduced graphene oxide hierarchical nanocomposite as a high-performance cathode material for lithium ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
27 May 2013
Accepted
02 Jul 2013
First published
02 Jul 2013

J. Mater. Chem. A, 2013,1, 10814-10820

Self-assembled V2O5 nanosheets/reduced graphene oxide hierarchical nanocomposite as a high-performance cathode material for lithium ion batteries

J. Cheng, B. Wang, H. L. Xin, G. Yang, H. Cai, F. Nie and H. Huang, J. Mater. Chem. A, 2013, 1, 10814 DOI: 10.1039/C3TA12066J

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