High-performance self-organized Si nanocomposite anode for lithium-ion batteries

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	High-performance self-organized Si nanocomposite anode for lithium-ion batteries
	Zhao, XY ; Xia, DG ; Gu, L ; Yue, JC ; Li, B ; Wei, H ; Yan, HJ ; Zou, RQ ; Wang, YX ; Wang, XY ; Zhang, Z ; Li, JX
刊名	JOURNAL OF ENERGY CHEMISTRY
	2014
卷号	23 期号:3 页码:291
关键词	cycling performance self-organized Si nanocomposite anode lithium ion batteries
ISSN号	2095-4956
通讯作者	Xia, DG (reprint author), Peking Univ, Coll Engn, Beijing 100871, Peoples R China.
中文摘要	Silicon is being investigated extensively as an anodic material for next-generation lithium ion batteries for portable energy storage and electric vehicles. However, the large changes in volume during cycling lead to the breakdown of the conductive network in Si anodes and the formation of an unstable solid-electrolyte interface, resulting in capacity fading. Here, we demonstrate nanoparticles with a Si@Mn22.6Si5.4C4@C double-shell structure and the formation of self-organized Si-Mn-C nanocomposite anodes during the lithiation/delithiation process. The anode consists of amorphous Si particles less than 10 nm in diameter and separated by an interconnected conductive/buffer network, which exhibits excellent charge transfer kinetics and charge/discharge performances. A stable specific capacity of 1100 mAhg(-1) at 100 m.A.g(-1) and a coulombic efficiency of 99.2% after 30 cycles are achieved. Additionally, a rate capacity of 343 mAh.g(-1) and a coulombic efficiency of 99.4% at 12000 mA.g(-1) are also attainable. Owing to its simplicity and applicability, this strategy for improving electrode performance paves a way for the development of high-performance Si-based anodic materials for lithium ion batteries.
资助信息	Major Program of Beijing Municipal Natural Science Foundation [2110001]; National Natural Science Foundation of China [11179001]; National High Technology Research and Development Program [2012AA052201]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59192]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhao, XY,Xia, DG,Gu, L,et al. High-performance self-organized Si nanocomposite anode for lithium-ion batteries[J]. JOURNAL OF ENERGY CHEMISTRY,2014,23(3):291.
APA	Zhao, XY.,Xia, DG.,Gu, L.,Yue, JC.,Li, B.,...&Li, JX.(2014).High-performance self-organized Si nanocomposite anode for lithium-ion batteries.JOURNAL OF ENERGY CHEMISTRY,23(3),291.
MLA	Zhao, XY,et al."High-performance self-organized Si nanocomposite anode for lithium-ion batteries".JOURNAL OF ENERGY CHEMISTRY 23.3(2014):291.