Exotic Reaction Front Migration and Stage Structure in Lithiated Silicon Nanowires

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	Exotic Reaction Front Migration and Stage Structure in Lithiated Silicon Nanowires
	Wang, LF ; Liu, DH ; Yang, SZ ; Tian, XZ ; Zhang, GY ; Wang, WL ; Wang, EG ; Xu, Z ; Bai, XD
刊名	ACS NANO
	2014
卷号	8 期号:8 页码:8249
关键词	silicon nanowire lithium ion battery reaction front stage structure in situ transmission electron microscopy
ISSN号	1936-0851
通讯作者	Xu, Z (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Nanostructured silicon anodes, which possess extremely high energy density and accommodate large strain without pulverization, have been developed rapidly for high-power lithium ion batteries. Here, using in situ transmission electron microscopy, the lithiation behavior of silicon nanowires with diameters smaller than 60 nm was investigated. The study demonstrated a direct dependence of the self-limiting lithiation on the pristine diameter. A punch through lithiation process at the core of nanowires with pristine diameters slightly larger than the self-limiting threshold is suggested to occur with the consequent formation of a stage structure. Our work demonstrates the crucial role of mechanical stress and local defects in determining the migration and geometry of the reaction front at the mesoscopic scale. This intriguing finding holds critical significance for the application of silicon nanostructures in high power lithium ion batteries.
资助信息	National 973 program [2012CB933003, 2013CB93201]; Natural Science Foundation [11004230, 51172273, 21322304, 11290161]; Strategic Priority Research Program B of the Chinese Academy of Sciences of China [XDB07030100]
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/311004/58791]
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	Wang, LF,Liu, DH,Yang, SZ,et al. Exotic Reaction Front Migration and Stage Structure in Lithiated Silicon Nanowires[J]. ACS NANO,2014,8(8):8249.
APA	Wang, LF.,Liu, DH.,Yang, SZ.,Tian, XZ.,Zhang, GY.,...&Bai, XD.(2014).Exotic Reaction Front Migration and Stage Structure in Lithiated Silicon Nanowires.ACS NANO,8(8),8249.
MLA	Wang, LF,et al."Exotic Reaction Front Migration and Stage Structure in Lithiated Silicon Nanowires".ACS NANO 8.8(2014):8249.