globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2019.12.005
论文题名:
Thermal pyrolysis of Si@ZIF-67 into Si@N-doped CNTs towards highly stable lithium storage
作者: Jin D.; Yang X.; Ou Y.; Rao M.; Zhong Y.; Zhou G.; Ye D.; Qiu Y.; Wu Y.; Li W.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:6
起始页码: 452
结束页码: 459
语种: 英语
中文关键词: 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)
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169937
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Science Bulletin,2020-01-01,65(6)
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