文献类型：期刊文献

英文题名：Face-to-Face Contact and Open-Void Coinvolved Si/C Nanohybrids Lithium-Ion Battery Anodes with Extremely Long Cycle Life

作者：Jing, Shilong[1];Jiang, Hao[1];Hu, Yanjie[1];Shen, Jianhua[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2015

卷号：25

期号：33

起止页码：5395

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20153101083630);WOS:【SCI-EXPANDED(收录号:WOS:000360724600018)】；

基金：This work was supported by the National Natural Science Foundation of China (21206043, 21236003), the Shanghai Shuguang Scholars Program (13SG31), the Shanghai Rising-Star Program (13QA1401100, 15QA1401200), the 111 Project (B14018), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：face-to-face contact; carbon aerogels; lithium-ion battery; open-void; silicon

摘要：To develop high-performance anode materials of lithium-ion batteries (LIBs) instead of commercial graphite for practical applications, herein, a layer of silicon has been well-anchored onto a 3D graphene/carbon nanotube (CNT) aerogels (CAs) framework with face-to-face contact and balanced open void by a simple chemical vapor deposition strategy. The engineered contact interface between CAs and Si creates high-efficiency channels for the rapid electrons and lithium ions transport, and meanwhile, the balanced open-void allows the free expansion of Si during cycling while maintaining high structural integrity due to the robust mechanical strength of 3D CAs framework. As a consequence, the as-synthesized Si/CAs nanohybrids are highly stable anode materials for LIBs with a high reversible discharge capacity (1498 mAh g(-1) at 200 mA g(-1)) and excellent rate capability (462 mAh g(-1) at 10 000 mA g(-1)), which is much better than Si/graphene-CNTs-mixture (51 mAh g(-1) at 10 000 mA g(-1)). More significantly, it is found that the Si/CAs nanohybrids display no obvious capacity decline even after 2000 cycles at a high current density of 10 000 mA g(-1). The present Si/CAs nanohybrids are one of the most stable Si-based anode materials ever reported for LIBs to date.