气候变化领域集成服务门户(CCPortal): Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage

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DOI	10.1016/j.scib.2019.12.005
	Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage
	Jin D.; Yang X.; Ou Y.; Rao M.; Zhong Y.; Zhou G.; Ye D.; Qiu Y.; Wu Y.; Li W.
发表日期	2020
ISSN	20959273
起始页码	452
结束页码	459
卷号	65 期号:6
英文摘要	Silicon is attracting considerable attention as an active anode material for advanced lithium-ion batteries due to its ultrahigh theoretical capacity. However, the reversible utilization of silicon-based anode materials is still hindered by the rapid capacity decay, as a consequence of the huge volume change of silicon during cycling. Herein, we use a Co-zeolitic imidazole framework (ZIF-67) to prepare silicon-wrapped nitrogen-doped carbon nanotubes (Si@N-doped CNTs) by controllable thermal pyrolysis. The as-prepared nanocomposites can effectively prevent pulverization and accommodate volume fluctuations of silicon during cycling. It can deliver a highly reversible capacity of 1100 mAh g−1 even after 750 cycles at a current density of 1000 mA g−1. As confirmed by an in situ transmission electron microscopy experiment, the remarkable electrochemical performance of Si@N-doped CNTs is attributed to the high electronic conductivity and flexibility of cross-linked N-doped CNTs network as a cushion to mitigate the mechanical stress and volume expansion. Furthermore, a full cell consisting of Si@N-doped CNTs anode and LiFePO4 cathode delivers a high reversible capacity of 1264 mAh g−1 and exhibits good cycling stability (>85% capacity retention) over 140 cycles at 1/4 C (1 C = 4000 mA g−1) rate. © 2019 Science China Press
关键词	Cyclic stability In situ growth Lithium storage N-doped CNTs Silicon nanoparticles
英文关键词	Anodes; Carbon nanotubes; High resolution transmission electron microscopy; In situ processing; Iron compounds; Lithium compounds; Lithium-ion batteries; Pyrolysis; Silicon compounds; Cyclic stability; In-situ growth; Lithium storages; N-doped; Silicon nanoparticles; Doping (additives)
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207081
作者单位	School of Chemistry, South China Normal University, Guangzhou, 510006, China; Analytical and Testing Centre, South China University of Technology, Guangzhou, 510640, China; Zhao Qing Outstanding Power Battery System Co., Ltd.Zhaoqing 526238, China; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China; National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Laboratory of ETESPG (GHEI), South China Normal University, Guangzhou, 510006, China
推荐引用方式 GB/T 7714	Jin D.,Yang X.,Ou Y.,et al. Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage[J],2020,65(6).
APA	Jin D..,Yang X..,Ou Y..,Rao M..,Zhong Y..,...&Li W..(2020).Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage.Science Bulletin,65(6).
MLA	Jin D.,et al."Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage".Science Bulletin 65.6(2020).