| DOI | 10.1016/j.scib.2020.05.018
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| A thick yet dense silicon anode with enhanced interface stability in lithium storage evidenced by in situ TEM observations |
| Han J.; Tang D.-M.; Kong D.; Chen F.; Xiao J.; Zhao Z.; Pan S.; Wu S.; Yang Q.-H.
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| 发表日期 | 2020
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| ISSN | 20959273
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| 起始页码 | 1563
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| 结束页码 | 1569
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| 卷号 | 65期号:18 |
| 英文摘要 | Increasing the density and thickness of electrodes is required to maximize the volumetric energy density of lithium-ion batteries for practical applications. However, dense and thick electrodes, especially high-mass-content (>50 wt%) silicon anodes, have poor mechanical stability due to the presence of a large number of unstable interfaces between the silicon and conducting components during cycling. Here we report a network of mechanically robust carbon cages produced by the capillary shrinkage of graphene hydrogels that can contain the silicon nanoparticles in the cages and stabilize the silicon/carbon interfaces. In situ transmission electron microscope characterizations including compression and tearing of the structure and lithiation-induced silicon expansion experiments, have provided insight into the excellent confinement and buffering ability of this interface-strengthened graphene-caged silicon nanoparticle anode material. Consequently, a dense and thick silicon anode with reduced thickness fluctuations has been shown to deliver both high volumetric (>1000 mAh cm−3) and areal (>6 mAh cm−2) capacities together with excellent cycling capability. © 2020 Science China Press |
| 关键词 | Dense and thick electrodesIn situ TEMInterface stabilityLithium-ion batterySilicon anode |
| 英文关键词 | Graphene; In situ processing; Lithium-ion batteries; Mechanical stability; Nanoparticles; Silicon; Transmission electron microscopy; Graphene hydrogels; Interface stabilities; Lithium storages; Mechanically robust; Silicon nanoparticles; Thickness fluctuations; Unstable interfaces; Volumetric energy densities; Anodes |
| 语种 | 英语
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| 来源期刊 | Science Bulletin
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| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/207051
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| 作者单位 | Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300350, China; International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan; CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China; Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China
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推荐引用方式
GB/T 7714 |
Han J.,Tang D.-M.,Kong D.,et al. A thick yet dense silicon anode with enhanced interface stability in lithium storage evidenced by in situ TEM observations[J],2020,65(18).
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| APA |
Han J..,Tang D.-M..,Kong D..,Chen F..,Xiao J..,...&Yang Q.-H..(2020).A thick yet dense silicon anode with enhanced interface stability in lithium storage evidenced by in situ TEM observations.Science Bulletin,65(18).
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| MLA |
Han J.,et al."A thick yet dense silicon anode with enhanced interface stability in lithium storage evidenced by in situ TEM observations".Science Bulletin 65.18(2020).
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