Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 能量转换材料重点实验室 > 期刊论文

	Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials
	Ding, Xuli 1; Liu, XiaoXiao 2; Huang, Yangyang 2; Zhang, Xuefu 3; Zhao, Qianjin 2; Xiang, Xinghua 2; Li, Guolong 2; He, Pengfei 4; Wen, Zhaoyin 5; Li, Ju 1,6,7
刊名	NANO ENERGY
	2016-09-01
卷号	27 页码:647-657
关键词	Nano-silicon Monolayer graphene Chemical vapor deposition Melt-self-assembly Composite anode
英文摘要	The high specific capacity battery electrode materials have stimulated great research interest. Silicon (Si) as a low-cost abundant material with a theoretical specific capacity of 4200 mA h g(-1), offers an attractive option for the low-cost next-generation high capacity Li-ion batteries anode. However, successful applications of silicon anode have been impeded by several limitations such as large volume expansion (400%) with lithiation, poor conductivity and unstable solid electrolyte interphase (SEI) with cycles. To address these challenges, we engineered Si nanoparticles by encapsulating them with monolayer graphene (mGra) with empty space generated by melt-self-assembly Cu layer. Here, a new method is introduced to uniform encapsulate the nano-silicon particles. The synthesis process used low-cost Si nanoparticles and Cu foils via chemical vapor deposition methods. The mGra and void space around the Si nanoparticles guaranteed to overcome mentioned problems. The flexibility nature and high conductivity of mGra effectively accommodate the Si volume expansion associated with the lithiation, and function as charges fast channels that allow for ions and electrons transport in fast kinetics. Most important, the crystalized mGra layer served as a flexible protective layer avoiding the SNPs direct exposed to electrolyte, which boosted the formation of stable and thin SEI interface. Our anode demonstrated a high initial coulomb efficiency (CE) 85% with gravimetric capacity similar to 1450 mA h g(-1) (based on the total mass) and long cycle life (500 cycles with 89% capacity retention). Such SNP@void@mGra structure orienting excellent cycle life and high charge capacity provide a promising prospect for the next-generation high specific energy battery. (C) 2016 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]	LITHIUM-ION-BATTERY ; LONG CYCLE LIFE ; HIGH-CAPACITY ; ENERGY DENSITY ; HIGH-POWER ; SI ; CARBON ; NANOPARTICLES ; ELECTRODES ; NANOWIRES
收录类别	SCI
语种	英语
WOS记录号	WOS:000384910500072
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/22014]
专题	上海硅酸盐研究所_能量转换材料重点实验室_期刊论文
作者单位	1.Tongji Univ, Sch Mat Sci & Engn, Collaborat Innovat Ctr Intelligent New Energy Veh, Shanghai 201804, Peoples R China 2.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 4.Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China 5.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China 6.MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA 7.MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
推荐引用方式 GB/T 7714	Ding, Xuli,Liu, XiaoXiao,Huang, Yangyang,et al. Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials[J]. NANO ENERGY,2016,27:647-657.
APA	Ding, Xuli.,Liu, XiaoXiao.,Huang, Yangyang.,Zhang, Xuefu.,Zhao, Qianjin.,...&Huang, Yunhui.(2016).Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials.NANO ENERGY,27,647-657.
MLA	Ding, Xuli,et al."Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials".NANO ENERGY 27(2016):647-657.