文献类型：期刊文献

英文题名：Scalable synthesis of core-shell structured SiOx/nitrogen-doped carbon composite as a high-performance anode material for lithium-ion batteries

作者：Shi, Lu[1,2,3];Wang, Weikun[3];Wang, Anbang[3];Yuan, Keguo[3];Jin, Zhaoqing[3];Yang, Yusheng[3]

第一作者：Shi, Lu;史璐

通讯作者：Wang, WK[1]

机构：[1]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[2]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;[3]Res Inst Chem Def, Mil Power Sources Res & Dev Ctr, Beijing 100191, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Res Inst Chem Def, Mil Power Sources Res & Dev Ctr, Beijing 100191, Peoples R China.

年份：2016

卷号：318

起止页码：184-191

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20161602252834);Scopus(收录号：2-s2.0-84962815458);WOS:【SCI-EXPANDED(收录号:WOS:000376051300022)】；

基金：This work was financially supported by the Fund from Beijing Science and Technology Project.

语种：英文

外文关键词：SiOx; Core-shell structure; Polydopamine coating; Uniform nitrogen-doped carbon coating layer; Lithium-ion batteries

摘要：In this work, a novel core-shell structured SiOx/nitrogen-doped carbon composite has been prepared by simply dispersing the SiOx particles, which are synthesized by a thermal evaporation method from an equimolar mixture of Si and SiO2, into the dopamine solution, followed by a carbonization process. The SiOx core is well covered by the conformal and homogeneous nitrogen-doped carbon layer from the pyrolysis of polydopamine. By contrast with the bare SiOx, the electrochemical performance of the as prepared core-shell structured SiOx/nitrogen-doped carbon composite has been improved significantly. It delivers a reversible capacity of 1514 mA h g-1 after 100 cycles at a current density of 100 mA g(-1) and 933 mA h g(-1) at 2 A g(-1), much higher than those of commercial graphite anodes. The nitrogen-doped carbon layer ensures the excellent electrochemical performance of the SiOx/C composite. In addition, since dopamine can self-polymerize and coat virtually any surface, this versatile, facile and highly efficient coating process may be widely applicable to obtain various composites with uniform nitrogen doped carbon coating layer. (C) 2016 Elsevier B.V. All rights reserved.