Geometric design of micron-sized crystalline silicon anodes through in situ observation of deformation and fracture behaviors

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	Geometric design of micron-sized crystalline silicon anodes through in situ observation of deformation and fracture behaviors
	Zhang Xing-yu; Song WL; Liu ZL; Chen HS; Li T; Wei YJ(魏宇杰); Fang DN; Wei YJ(魏宇杰)
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017-07-07
卷号	5 期号:25 页码:12793-12802
ISSN号	2050-7488
中文摘要	Large anisotropic volume expansion during lithiation leads to the electrochemical performance degradation and premature fracture of micro-sized silicon electrodes in lithium-ion batteries, which prohibits its practical applications. To date, the failure mechanism of micron-size silicon electrodes has not been fully comprehended due to the lack of convincing experiments. For good understanding of lithiation/delithiation processes in the silicon anodes, in the present contribution, in situ observation of anisotropic volume expansion, crack initiation, penetration, deflection and delamination at the amorphous/crystalline silicon interface has been reported. The observation suggests that novel hollow and anisometric geometric electrodes have shown substantially enhanced capability in improving the fracture behaviors of the crystalline micropillar electrodes, implying that geometric design greatly impacts the strain alleviation and reversible volume change. Due to more favorable mechanical reliability, the anisometric geometric silicon electrode is expected to present essentially enhanced electrochemical performance and structural stability, which promises a novel strategy of designing Li-ion battery electrodes from a geometric perspective.
类目[WOS]	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Energy & Fuels ; Materials Science
关键词[WOS]	LITHIUM-ION BATTERIES ; NEGATIVE ELECTRODES ; ENERGY DENSITY ; LITHIATION ; LI ; INSERTION ; NANOPILLARS ; PARTICLES ; KINETICS ; FAILURE
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000404571500018
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60634]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhang Xing-yu,Song WL,Liu ZL,et al. Geometric design of micron-sized crystalline silicon anodes through in situ observation of deformation and fracture behaviors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(25):12793-12802.
APA	Zhang Xing-yu.,Song WL.,Liu ZL.,Chen HS.,Li T.,...&Wei YJ.(2017).Geometric design of micron-sized crystalline silicon anodes through in situ observation of deformation and fracture behaviors.JOURNAL OF MATERIALS CHEMISTRY A,5(25),12793-12802.
MLA	Zhang Xing-yu,et al."Geometric design of micron-sized crystalline silicon anodes through in situ observation of deformation and fracture behaviors".JOURNAL OF MATERIALS CHEMISTRY A 5.25(2017):12793-12802.