Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6579839 | Chemical Engineering Journal | 2018 | 8 Pages |
Abstract
Various kinds of efforts have been devoted to ameliorate the serious volume-expansion effect and low electron conductivity of silicon-based materials in lithium ion batteries. Here, we report a facile high voltage sputtering process to prepare three-dimensional hierarchical porous nitrogen-doped carbon coated Si microsphere to significantly improve the lithium storage performance. The structure and morphology of the as-obtained samples are characterized by X-ray diffraction, transmission electron microscope and scanning electron microscope. The results indicate that the as-prepared composite is composed of silicon nanoparticles (â¼100â¯nm) coated with conductive thin carbon layer (â¼8.5â¯nm). The composite shows excellent lithium storage performance with a reversible capacity of 1565 mAhâ¯gâ1 after 100 cycles at a current density of 0.5â¯Aâ¯gâ1, as well as a long cycling performance at the high current density of 2â¯Aâ¯gâ1. The facile preparation process and highly silicon-loading (â¼78%) makes the prepared material be a great potential application in lithium-ion batteries.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Niantao Liu, Xamxikamar Mamat, Ruyuan Jiang, Wei Tong, Yudai Huang, Dianzeng Jia, Yongtao Li, Lei Wang, Thomas WÃ¥gberg, Guangzhi Hu,