IMECH-IR  > 非线性力学国家重点实验室
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; Fang, DN (reprint author), Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
2017-07-07
Volume5Issue:25Pages:12793-12802
ISSN2050-7488
Abstract

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.

DOI10.1039/c7ta02527k
Indexed BySCI ; EI
Language英语
WOS IDWOS:000404571500018
WOS KeywordLITHIUM-ION BATTERIES ; NEGATIVE ELECTRODES ; ENERGY DENSITY ; LITHIATION ; LI ; INSERTION ; NANOPILLARS ; PARTICLES ; KINETICS ; FAILURE
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(11672341||Foundation for Innovative Research Groups of the National Natural Science Foundation of China(11521202)||National Materials Genome Project(2016YFB0700600)||111572002)
DepartmentLNM微结构计算力学
Classification一类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60634
Collection非线性力学国家重点实验室
Corresponding AuthorFang, DN (reprint author), Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.
Recommended Citation
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.,...&Fang, DN .(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.
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