A Novel Method to Synthesis Titanium Dioxide(B)/Anatase composite oxides by Solid-State Chemical Reaction Routes for Promoting Li+ Insertion

Abstract Titanium dioxide (TiO 2 ) materials are applied as electrode materials of Lithium-ion batteries in terms of good cycling stability. However, the poor lithium-ions batteries transport kinetics and low electronic conductivity limited the development of TiO 2 as anode materials. As known, TiO 2 (B) is a metastable phase of titanium oxide and has better electrochemical performance than others. The crystal structure of TiO 2 (B) is comprised of edge and corner-sharing TiO 6 octahedra which can lead to facile lithium-ion intercalation. In order to solve this problem, it is desirable to control the morphology of TiO 2 (B) to shorten the Li + diffusion path. In this study, synthesized TiO 2 (B)/Anatase composite materials is deal anode materials for Lithium-ion batteries. The anatase makes the composite materials have long term stability. Because the anatase phase TiO 2 has stable structure and it is hard to transform to other phases. Moreover, TiO 2 (B) provides the Li + ion diffusion path to improve the electrochemical performance. Nowadays hydrothermal methods for the synthesis of TiO 2 (B) are the only reported. Herein, we report a new method to synthesize TiO 2 (B). The nanoparticles TiO 2 (B)/Anatase composite oxide can be successfully fabricated via a simple solid-state chemical reaction. The titanium oxysulfate sulfuric acid hydrate and oxalic acid are used as starting materials. The synthesis is processed with low-temperature solid-state reaction and then calcination. Compared to the traditional hydrothermal method, the synthesis process of solid-state chemical reaction is greener, simpler and eco-friendlier. This method has significant advantage in the field of nano materials synthesis. In this work, the uniformly TiO 2 (B)/Anatase microspheres are synthesized with a high crystalline. The synthesized TiO 2 (B)/Anatase displays good cycling stability and high capacity retention as an anode material for Lithium-ion batteries. This work provides a new idea for the future research of titanium oxide-based materials for anode materials.