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Preparation and electrochemical properties of TiO2 hollow spheres as an anode material for lithium-ion batteries |
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| Authors: | Jipeng Wang Muying Wu W.F. Zhang |
| Affiliation: | a School of Physics & Electronics, Henan University, Minglun Str., Kaifeng 475001, China b Department of Electronic Engineering, Dongguan University of Technology, Dongguan 523808, China c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
| Abstract: | TiO2 hollow spheres are fabricated by a sol-gel process using carbon spheres as template. The diameter and the shell thickness of the TiO2 hollow spheres are about 400-600 nm and 60-80 nm, respectively. The electrochemical properties of the hollow spheres are investigated by galvanostatic cycling and cyclic voltammetry (CV) measurements. The initial discharge capacity reaches 291.2 mAh g−1 at a current density of 60 mA g−1. The average discharge capacity loss is about 1.72 mAh g−1 per cycle from the 2nd to the 40th cycles and the coulombic efficiency is approximately 98% after 40 cycles, indicating excellent cycling stability and reversibility. |
| Keywords: | TiO2 Hollow spheres Electrochemistry Li-ion batteries |
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