Facile synthesis of the sandwich-structured germanium/reduced graphene oxide hybrid: An advanced anode material for high-performance lithium ion batteries

doi:10.1039/c7ta03087h

SIC OpenIR

	Facile synthesis of the sandwich-structured germanium/reduced graphene oxide hybrid: An advanced anode material for high-performance lithium ion batteries
	Wang, Bangrun 1,2; Jin, Jun 1; Hong, Xiaoheng 1,3; Gu, Sui 1,2; Guo, Jing 1,2; Wen, Zhaoyin 1
	2017
发表期刊	Journal of Materials Chemistry A
ISSN	20507488
卷号	5 期号:26 页码:13430-13438
摘要	A sandwich-structured reduced graphene oxide/germanium/reduced graphene oxide hybrid (denoted as rGO/Ge/rGO) is successfully synthesized through a facile thermal reduction method for the first time. The rGO/Ge/rGO hybrid, with submicron Ge crystals (200-600 nm) uniformly encapsulated in a conductive rGO matrix, offers several favorable features: enough void space to accommodate the volume change, fast electrons and lithium ions transport, and superior structural stability. When acting as the anode in lithium ion batteries (LIBs), rGO/Ge/rGO exhibits significantly improved electrochemical performance compared to that of pure Ge, owing to the sufficient wrapping of Ge by rGO and strong chemical interaction between Ge and rGO. Enhanced reversible specific capacity of 1085 mA h g-1after 500 cycles can be achieved at 1C rate (1C = 1600 mA g-1) with the capacity loss of ∼0.017% per cycle. Furthermore, the coin-type full cell composed of the rGO/Ge/rGO anode and the LiNi0.5Co0.2Mn0.3O2cathode delivers a high specific capacity of 940 mA h g-1with a capacity retention of 93.6% after 100 cycles at 1C rate. Such a sandwich-type rGO/Ge/rGO hybrid, which presents excellent cycle life and remarkably high capacity, is expected to be a promising anode material candidate for further application in next-generation high energy density LIBs and other electrochemical devices. © 2017 The Royal Society of Chemistry.
DOI	10.1039/c7ta03087h
EI入藏号	20172803928054
EI主题词	Lithium-ion batteries
EI分类号	714.1 Electron Tubes - 761 Nanotechnology - 804 Chemical Products Generally
引用统计
文献类型	期刊论文
条目标识符	http://ir.sic.ac.cn/handle/331005/25865
专题	中国科学院上海硅酸盐研究所
作者单位	1.CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai; 200050, China; 2.University of Chinese Academy of Science, Beijing; 100049, China; 3.Shanghaitech University, Shanghai; 200031, China
推荐引用方式 GB/T 7714	Wang, Bangrun,Jin, Jun,Hong, Xiaoheng,et al. Facile synthesis of the sandwich-structured germanium/reduced graphene oxide hybrid: An advanced anode material for high-performance lithium ion batteries[J]. Journal of Materials Chemistry A,2017,5(26):13430-13438.
APA	Wang, Bangrun,Jin, Jun,Hong, Xiaoheng,Gu, Sui,Guo, Jing,&Wen, Zhaoyin.(2017).Facile synthesis of the sandwich-structured germanium/reduced graphene oxide hybrid: An advanced anode material for high-performance lithium ion batteries.Journal of Materials Chemistry A,5(26),13430-13438.
MLA	Wang, Bangrun,et al."Facile synthesis of the sandwich-structured germanium/reduced graphene oxide hybrid: An advanced anode material for high-performance lithium ion batteries".Journal of Materials Chemistry A 5.26(2017):13430-13438.