Title: Self-assembled V₃O₇/graphene oxide nanocomposites as cathode material for lithium-ion batteries

Authors: Jie Xu; Zhaolong Li; Xiaoyan Zhang; Shengnan Huang; Shanshan Jiang; Quanyao Zhu; Huajun Sun; Galina S. Zakharova

Addresses: School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China ' Institute of Solid State Chemistry of the Ural Branch, Russian Academy of Science, Pervomaiskaya 91, Yekaterinburg, 620219, Russia

Abstract: The V₃O₇/graphene oxide nanocomposites (V₃O₇/GO) were synthesised by a hydrothermal method. In the nanocomposites, the V₃O₇ nanobelts are dozens of nanometres in width and several micrometres in length. Acted as the electrode materials, the V₃O₇/GO nanocomposites exhibit a high initial discharge capacity of 352 mAh·g⁻¹ at the current density of 100 mA·g⁻¹. Moreover, V₃O₇/GO electrode materials exhibit a good cycling performance. Comparing the 50th cycle with the 1st cycle, the capacity retention of the V₃O₇/GO nanocomposites is 87% and 91% at the current density of 400 mA·g⁻¹ and 800 mA·g⁻¹, respectively.

Keywords: V3O7 nanobelts; graphene oxide; nanocomposites; self-assembly; electrochemical properties; cathode materials; lithium-ion batteries; LIBs; nanotechnology; vanadium.

DOI: 10.1504/IJNT.2014.063790

International Journal of Nanotechnology, 2014 Vol.11 No.9/10/11, pp.808 - 818

Published online: 14 Jan 2015 *

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