Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6663746 | Journal of Electroanalytical Chemistry | 2008 | 7 Pages |
Abstract
Si/LiTi2O4 nanocomposite film was synthesized by a sol-gel method in combination with a following heat-treatment process. Through this process, the nanosized Si particles were homogeneously distributed in the porous composite. The electrochemically less active LiTi2O4 working as a buffer matrix successfully prevented Si from cracking/crumbling during the charging/discharging process. The Si/LiTi2O4 nanocomposite exhibited a reversible lithium storage capacity of about 1100 mA h gâ1 with good cyclability, suggesting its promising nature in anode materials for Li ion batteries. A two-parallel diffusion path model fitted well with the impedance data of porous Si/LiTi2O4 composite at different potentials. The impedance in the low-frequency region was directly related to the diffusion of Li ions, and the Li ion diffusivity was on the order of 10â13 cm2 sâ1 based on the semi-infinite diffusion model.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Z.Y. Zeng, J.P. Tu, X.L. Wang, X.B. Zhao,