▎ 摘　　要

Owing to their high theoretical capacity, silicon-based materials are thought to be the most potential anodic substances for lithium ion batteries. Nevertheless, the substantial volume changes of silicon leads to a severe pulverzation and fast capacity reduction. To improve these issues, a novel nitrogen doped carbon-coated silicon embedding in graphene sheet is well-developed by a facile approach. When fabricated as an anode in Li-ion batteries, the obtained silicon-based material manifests a large initial reversible capacity of 1870 mAh g(-1), shows a superior initial Coulomb efficiency of 86.2%, and demonstrates a superior cycling property of 1045 mAh g(-1) at 0.1 A g(-1) after 200 cycles. Furthermore, a remarkable large capacity of 865 mAh g(-1) is achieved even at a considerably elevated rate of 5 A g(-1) and the capacity still remains at 1334 mAh g(-1) when returns to 0.1 A g(-)(1).