Hybrid nanoarchitecture of rutile TiO2 nanoneedle/graphene for advanced lithium-ion batteries

作者：Gan, Yongping; Zhu, Lingyan; Qin, Huaipeng; Xia, Yang^*; Xiao, Han; Xu, Lusheng; Ruan, Luoyuan; Liang, Chu; Tao, Xinyong; Huang, Hui; Zhang, Wenkui

来源：Solid State Ionics, 2015, 269: 44-50.

DOI：10.1016/j.ssi.2014.11.017

• Rutile TiO2
• Graphene
• Hydrothermal
• Hybrid nanostructure
• Li-ion battery

In this paper, rutile TiO2 nanoneedle/graphene composites with a unique one dimensional/two dimensional (1D/2D) hybrid nanostructure were prepared via a facile hydrothermal route. These obtained rutile TiO2 nanoneedles with the length of similar to 500 nm have a homogeneous dispersion on the interlayers of graphene nanosheets. As the anodic materials, the as-prepared sample exhibited the superior Li storage capability with good cycling stability (over 94% capacity retention) and remarkable rate performance (149 mA h g(-1) at a 5 Crate). The improved electrochemical performance can be attributed to the unique microstructure. On the one hand, 1D rutile TiO2 nanoneedles shorten the length of Li+ transport paths to achieve a higher Li+ diffusion rate. On the other hand, 2D graphene sheets provide good electronic contacts to reduce the contact resistance, as well as keep the structural integrity of the electrode materials.

• 出版日期2015-1
• 单位浙江工业大学