Anatase/rutile titania anchored carbon nanotube porous nanocomposites as superior anodes for lithium ion batteries

作者：Tang, Yakun; Liu, Lang^*; Zhao, Hongyang; Jia, Dianzeng; Xie, Xiaolin^*; Zhang, Yang; Li, Xiaohui

来源：CrystEngComm, 2016, 18(24): 4489-4494.

DOI：10.1039/c6ce00328a

• NEGATIVE ELECTRODE MATERIAL
• HIGH-RATE CAPABILITY
• ELECTROCHEMICAL PERFORMANCE
• TIO2 RUTILE
• MICROSTRUCTURES
• NANOFIBERS
• NANOSHEETS
• OXIDES

Anatase/rutile titania anchored carbon nanotube (TiO2@CNT) porous nanocomposites are fabricated using TiCl3 and polymer nanotubes as the titanium and carbon sources, respectively, by a hydrothermal process with subsequent heat treatment. As anodes for lithium ion batteries, the electrochemical performance of the nanocomposites is highly dependent on the crystal phase and content of TiO2. Compared with anatase TiO2/C nanocomposites, the TiO2@CNT nanocomposites exhibit high reversible capacity, excellent rate capability and superior long-term cycling stability at high current densities. The enhanced electrochemical performance of the nanocomposites results from the shortened Li+ diffusion distance, large contact surface area and sufficient conductivity. In addition, the crystal interface effect of mixed-phase TiO2 could improve the dispersion rate of electrons, which is conducive to the rapid transport of Li+ and the electrons.

• 出版日期2016
• 单位华中科技大学; 中国科学院长春应用化学研究所; 新疆大学