期刊
IONICS
卷 26, 期 11, 页码 5349-5355出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-020-03730-2
关键词
Lithiumion batteries; Anodematerial; TiO2; Electrochemical performance
资金
- China Postdoctoral Science Foundation [2020M671361]
- Jiangsu Postdoctoral Science Foundation [2020Z090]
- National Natural Science Foundation of China [51774150, 51974137]
- Scientific Research Foundation for Senior Talent of Jiangsu University [14JDG130]
- Young Talents Training Program of Jiangsu University
The practical application of a titanium dioxide (TiO2) anode is restricted by the poor intrinsic ionic diffusion property and low theoretical capacity. Herein, sphere-like TiO2/Si nanoparticles were synthesized via a facile sol-gel method. Owing to the nano-spherical structure and the introduction of Si, the as-prepared TiO2/Si composite exhibits enhanced reversible capacity. Nanostructure of both TiO2 and Si materials provides short Li+ transmission pathways and high diffusion dynamics. The optimum ratio effectively alleviates the volume change of Si nanoparticles. The optimal mass ratio of TiO2/Si is 1:0.15, in which the composite electrode delivers excellent cycling life and rate performance, specifically, reversible capacity of 720.9 mAh g(-1) at a current density of 100 mA g(-1) and excellent long-term cycling stability with a capacity retention of 86.5% over 400 cycles.
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