Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7996411 | Journal of Alloys and Compounds | 2016 | 8 Pages |
Abstract
The composite of Fe2SiO4 with carbon nanotubes, Fe3O4 and Fe3C are fabricated by a simple one-step reaction between ferrocene and tetraethyl orthosilicate. The composite utilized as anode material for Li-ion storage exhibits ever-increasing capacities when cycled at a current density of 100Â mAÂ gâ1, and after 280 cycles, a stable capacity of 588Â mAh gâ1 is achieved. When cycled at 200, 400, 800 and 1600Â mAÂ gâ1, the reversible capacities are 364, 323, 281, 235, and 186Â mAh gâ1, respectively. Even cycled at 500Â mAÂ gâ1, a reversible capacity of 350Â mAh gâ1 is retained after 600 cycles. The excellent performance is much superior to that of the carbon-coated Fe3O4 prepared under the similar conditions. The outstanding performance associates significantly with the electronic conductivity of in-situ formed carbon nanotubes with uniform dispersion and Fe3C coated on the Fe2SiO4 nanoparticles, as well as the formation of lithium silicates to act as solid electrolyte for enhancing the ionic conductivity.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yun-Kai Sun, Xue Bai, Tao Li, Gui-Xia Lu, Yong-Xin Qi, Ning Lun, Yun Tian, Yu-Jun Bai,