Double-shelled hollow carbon spheres confining tin as high- performance electrodes for lithium ion batteries

doi:10.1016/j.electacta.2019.134672

	Double-shelled hollow carbon spheres confining tin as high- performance electrodes for lithium ion batteries
	Sun, Li; Ma, Tiantian; Zhang, Jun; Guo, Xiangxin; Yan, Chenglin; Liu, Xianghong
刊名	ELECTROCHIMICA ACTA
	2019-10-20
卷号	321
关键词	Negative electrode Hollow structure Long cycling Structure design Tin
ISSN号	0013-4686
DOI	10.1016/j.electacta.2019.134672
文献子类	Article
英文摘要	Alloy-type materials hold a great potential as the negative electrodes for next generation lithium-ion batteries with high energy and low cost. However, the huge volume expansion of alloy-type materials caused by lithium alloying inevitably leads to poor cycle stability. Herein, we propose a rational design of a sandwich structure of carbon/Sn/carbon hollow spheres by a template-engaged method. The structure effect of the novel carbon/Sn/carbon spheres on the lithium storage performances is elucidated by various means of characterization and electrochemical tests. A stable and high reversible capacity of 1100 mA h g(-1) is retained after 130 cycles at 0.1 A g(-1), significantly higher than that (187 mA h g(-1) ) of Sn/carbon hollow spheres. Furthermore, a superior rate capability is obtained for carbon/Sn/carbon spheres, e.g., showing a high capacity of 430 mA h g(-1) at 5 A g(-1). The excellent electrochemical properties of carbon/Sn/carbon against Sn/carbon are ascribed to a unique nano-confinement from the double-shelled carbons with very good structure stability and contribution of pseudocapacitive storage of lithium. These results indicate that the sandwich structure of carbon/Sn/carbon is highly effective to design electrode materials with enhanced performances. (C) 2019 Published by Elsevier Ltd.
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26771]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Sun, Li,Ma, Tiantian,Zhang, Jun,et al. Double-shelled hollow carbon spheres confining tin as high- performance electrodes for lithium ion batteries[J]. ELECTROCHIMICA ACTA,2019,321.
APA	Sun, Li,Ma, Tiantian,Zhang, Jun,Guo, Xiangxin,Yan, Chenglin,&Liu, Xianghong.(2019).Double-shelled hollow carbon spheres confining tin as high- performance electrodes for lithium ion batteries.ELECTROCHIMICA ACTA,321.
MLA	Sun, Li,et al."Double-shelled hollow carbon spheres confining tin as high- performance electrodes for lithium ion batteries".ELECTROCHIMICA ACTA 321(2019).