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. | |
发表期刊 | JOURNAL OF MATERIALS CHEMISTRY A |
2017-07-07 | |
卷号 | 5期号:25页码:12793-12802 |
ISSN | 2050-7488 |
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. |
DOI | 10.1039/c7ta02527k |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000404571500018 |
关键词[WOS] | LITHIUM-ION BATTERIES ; NEGATIVE ELECTRODES ; ENERGY DENSITY ; LITHIATION ; LI ; INSERTION ; NANOPILLARS ; PARTICLES ; KINETICS ; FAILURE |
WOS研究方向 | Chemistry ; Energy & Fuels ; Materials Science |
WOS类目 | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
项目资助者 | National 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) |
课题组名称 | LNM微结构计算力学 |
论文分区 | 一类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/60634 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Fang, DN (reprint author), Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China. |
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.,...&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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