Preparation of graphene/TiO 2 anode materials for lithium-ion batteries by a novel precipitation method

• Published in: Materials research bulletin Vol. 46; no. 12; pp. 2403 - 2407
• Main Authors: Ding, Yan-Huai, Zhang, Ping, Ren, Hu-Ming, Zhuo, Qin, Yang, Zhong-Mei, Jiang, Yong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2011
• Subjects: A. Nanostructure; B. Chemical synthesis; C. Electrochemical measurement; D. Electrochemical properties; B. Chemical synthesis; A. Nanostructure; C. Electrochemical measurement; D. Electrochemical properties
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2011.08.046

Large-scale preparation of graphene/TiO 2 composites was carried out by precipitation method using graphene oxide nanosheet, Ti(SO 4) 2 and NH 3H 2O as starting materials. [Display omitted] ► We use cheap graphene oxides, Ti(SO 4) 2 and NH 3H 2O as starting materials for preparation of graphene/TiO 2 composites. ► The reversible capacity and the cycling stability of the TiO 2 are improved by graphene additive. ► Shorter diffusion length and a larger contact area of graphene/TiO 2 result in excellent electrochemical performance. This paper reports a large-scale production route for graphene/TiO 2 nanocomposites using water-based in situ precipitation method. In this method, freshly prepared graphene oxides/TiO 2 obtained by precipitating Ti(SO 4) 2 with NH 3H 2O was subjected to heat treatment in the presence of N 2, which resulted in the formation of graphene/TiO 2 nanocomposites. Graphene/TiO 2 composites prepared by our method were found to be suitable as anode materials for lithium ion batteries because of its stable cycling performance and high capacity.