期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 25, 期 38, 页码 9071-9077出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201901238
关键词
doping; lithium-ion battery; materials science; mesoporous materials; nanostructures; silicon
资金
- National Natural Science Foundation of China [21471075, 21673115]
Nanostructured silicon-based materials with porous structures have recently been found to be impressive anode materials with high capacity and cycling performance for lithium-ion batteries. However, the current methods of preparing porous silicon have generally been confronted with the requirement for multiple steps and complex synthesis. In the present study, porous silicon with high surface area was prepared by using a high yielding and simple reaction in which commercial magnesium powder readily reacts with HSiCl3 with the help of an amine catalyst under mild conditions. The obtained porous silicon was coated with a nitrogen-doped carbon layer and used as the anode for lithium-ion batteries. The porous Si-carbon nanocomposites exhibited excellent cycling performance with a retained discharge capacity of 1300 mA h g(-1) after 200 cycles at 1 A g(-1) and a discharge capacity of 750 mA h g(-1) at a current density of 2 A g(-1) after 250 cycles. Remarkably, the Coulombic efficiency was maintained at nearly 100 % throughout the measurements.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据