Preparation of Si/Sn-Based Nanoparticles Composited with Carbon Fibers and Improved Electrochemical Performance as Anode Materials

被引:30
作者
Wang, Haiying [1 ]
Huang, Hongqin [1 ]
Chen, Lin [1 ]
Wang, Chunguang [1 ]
Yan, Bo [1 ]
Yu, Yongtao [2 ]
Yang, Yang [1 ]
Yang, Gang [1 ]
机构
[1] Changshu Inst Technol, Dept Chem, Jiangsu Lab Adv Funct Mat, Changshu 215500, Peoples R China
[2] Petrochina Jilin, Petrochem Co Res Inst, Jilin 132021, Peoples R China
关键词
Lithium ion batteries; Anode materials; Si/Sn@carbon; Composite materials; Electrospinning; NEGATIVE ELECTRODE; LITHIUM; LI; ALLOY; TIN; SILICON; NANOFIBERS; GRAPHITE; HETEROSTRUCTURES; MORPHOLOGY;
D O I
10.1021/sc500290x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Si/Sn-based nanoparticles with various particle sizes are enwrapped in carbon nanofibers to improve the stability of Si/Sn during lithium alloying and dealloying. The composite structure of Si/Sn@carbon fibers is controllably synthesized by electrospinning and heat treatment. The crystal structure, content, and morphologies of Si/Sn@carbon composites are tunable by the carbonization conditions. The electrochemical performance of the composites is improved by the buffer effect of carbon fibers. The sample of SiSnC_800, which the precursor TEOS/SnCl2/PAN, is carbonized at 800 degrees C, delivers a specific capacity of 1347 mAh g(-1) at the second cycles, and retains 1073 mAh g(-1) at 50th cycle. The as-synthesized samples are flexible self-supporting films, which can be directly used as anode materials for lithium ion batteries.
引用
收藏
页码:2310 / 2317
页数:8
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