In situ grown graphene-encapsulated germanium nanowires for superior lithium-ion storage properties

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	In situ grown graphene-encapsulated germanium nanowires for superior lithium-ion storage properties
	Wang, Chao ; Ju, Jing ; Yang, Yanquan ; Tang, Yufeng ; Lin, Jianhua ; Shi, Zujin ; Han, Ray P. S. ; Huang, Fuqiang
刊名	journal of materials chemistry c
	2013
英文摘要	Alloying anode materials (Si, Ge, Sn etc.) in lithium-ion batteries usually suffer from a remarkable loss of capacity during the charge-discharge cycling. Herein, homogeneous in situ-grown graphene-encapsulated Ge nanowires are successfully achieved by a simple, completely catalyst-free route via arc-discharge. The Ge@G composite is composed of a graphene sheath and a metallic Ge nanowire core. This unique composite of graphene-encapsulated Ge nanowires is an ideal anode material for lithium ion storage. It can exhibit excellent electrochemical performance with a reversible specific capacity of 1400 mA h g-1 after 50 cycles at a current density of 1600 mA g -1 (the theoretical specific capacity of Ge is 1624 mA h g -1). These encouraging results demonstrate that arc-discharge synthesis provides efficient graphene encapsulation of Ge nanowires, and graphene encapsulation is a feasible solution to protect electrode materials for lithium-ion storage. ? 2013 The Royal Society of Chemistry.; EI; 0; 31; 8897-8902; 1
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/316708]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Wang, Chao,Ju, Jing,Yang, Yanquan,et al. In situ grown graphene-encapsulated germanium nanowires for superior lithium-ion storage properties[J]. journal of materials chemistry c,2013.
APA	Wang, Chao.,Ju, Jing.,Yang, Yanquan.,Tang, Yufeng.,Lin, Jianhua.,...&Huang, Fuqiang.(2013).In situ grown graphene-encapsulated germanium nanowires for superior lithium-ion storage properties.journal of materials chemistry c.
MLA	Wang, Chao,et al."In situ grown graphene-encapsulated germanium nanowires for superior lithium-ion storage properties".journal of materials chemistry c (2013).