Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725395 | Journal of Power Sources | 2018 | 7 Pages |
Abstract
Si/C composites are currently the most commercially viable next-generation lithium-ion battery anode materials due to their high specific capacity. However, there are still many obstacles need to be overcome such as short cycle life and poor conductivity. In this work, we design and successfully synthesis an excellent durable double-conductive core-shell structure p-Si-Ag/C composites. Interestingly, this well-designed structure offers remarkable conductivity (both internal and external) due to the introduction of silver particles and carbon layer. The carbon layer acts as a protective layer to maintain the integrity of the structure as well as avoids the direct contact of silicon with electrolyte. As a result, the durable double-conductive core-shell structure p-Si-Ag/C composites exhibit outstanding cycling stability of roughly 1000â¯mAh gâ1 after 200 cycles at a current density of 0.2â¯Aâ¯gâ1 and retain 765â¯mAh gâ1 even at a high current density of 2â¯Aâ¯gâ1, indicating a great improvement in electrochemical performance compared with traditional silicon electrode. Our research results provide a novel pathway for production of high-performance Si-based anodes to extending the cycle life and specific capacity of commercial lithium ion batteries.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Yan Xing, Tong Shen, Ting Guo, Xiuli Wang, Xinhui Xia, Changdong Gu, Jiangping Tu,