Fabrication of porous Sn-C composites with high initial coulomb efficiency and good cyclic performance for lithium ion batteries

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	Fabrication of porous Sn-C composites with high initial coulomb efficiency and good cyclic performance for lithium ion batteries
	Z. Tan; Z. H. Sun; H. H. Wang; Q. Guo; D. S. Su
	2013
发表期刊	Journal of Materials Chemistry A
ISSN	2050-7488
卷号	1 期号:33 页码:9462-9468
摘要	In this paper, a cheap porous acrylic ion-exchange resin was introduced as a carbon source and metal ion supporter for the fabrication of Sn-C composites, which were used as anode materials for lithium ion batteries. The porous structure of the ion-exchange resin could be well preserved in the Sn-C composite, and Sn ions could be easily reduced to Sn nanoparticles. The as-prepared Sn-C composite showed high specific capacity and stable cycle performance. However, the large surface area and exposed metal nanoparticles of the porous Sn-C composites resulted in a low initial coulomb efficiency and led to potential safety problems. To remove these disadvantages, a surface carbon encapsulation process was applied to the porous Sn-C composite through a chemical vapour deposition process. The covered Sn-C composite showed an enclosed porous structure and all previously exposed Sn nanoparticles were perfectly encapsulated by amorphous carbon. The covered Sn-C composite also showed greatly improved chemical stability and a high initial coulomb efficiency over 80%.
部门归属	[tan, zhi ; sun, zhenhua ; wang, haihua ; guo, qi ; su, dangsheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; sun, zh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhsun@imr.ac.cn ; dangsheng@fhi-berlin.mpg.de
关键词	Anode Material Electrochemical Lithiation Irreversible Capacities Reversible Storage Carbon Electrode Tin Nanocomposites Nanoparticles Nanowires
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71493
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Tan,Z. H. Sun,H. H. Wang,et al. Fabrication of porous Sn-C composites with high initial coulomb efficiency and good cyclic performance for lithium ion batteries[J]. Journal of Materials Chemistry A,2013,1(33):9462-9468.
APA	Z. Tan,Z. H. Sun,H. H. Wang,Q. Guo,&D. S. Su.(2013).Fabrication of porous Sn-C composites with high initial coulomb efficiency and good cyclic performance for lithium ion batteries.Journal of Materials Chemistry A,1(33),9462-9468.
MLA	Z. Tan,et al."Fabrication of porous Sn-C composites with high initial coulomb efficiency and good cyclic performance for lithium ion batteries".Journal of Materials Chemistry A 1.33(2013):9462-9468.