Beyond yolk-shell nanoparticles: Fe3O4@Fe3C Core@Shell nanoparticles as yolks and carbon nanospindles as shells for efficient lithium ion storage

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題名:	Beyond yolk-shell nanoparticles: Fe3O4@Fe3C Core@Shell nanoparticles as yolks and carbon nanospindles as shells for efficient lithium ion storage
作者:	鄭芳怡;Zhang, Jianan;Wang, Kaixi;Xu, Qun;Zhou, Yunchun;Cheng, Fangyi;Guo, Shaojun
貢獻者:	地球科學學院大氣科學學系
日期:	2015-03-24
上傳時間:	2026-04-21 14:04:33 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： To well address the problems of large volume change and dissolution of Fe3O4 nanomaterials during Li+ intercalation/extraction, herein we demonstrate a one-step in situ nanospace-confined pyrolysis strategy for robust yolk–shell nanospindles with very sufficient internal void space (VSIVS) for high-rate and long-term lithium ion batteries (LIBs), in which an Fe3O4Fe3C coreshell nanoparticle is well confined in the compartment of a hollow carbon nanospindle. This particular structure can not only introduce VSIVS to accommodate volume change of Fe3O4 but also afford a dual shell of Fe3C and carbon to restrict Fe3O4 dissolution, thus providing dual roles for greatly improving the capacity retention. As a consequence, Fe3O4Fe3C–C yolk–shell nanospindles deliver a high reversible capacity of 1128.3 mAh g–1 at even 500 mA g–1, excellent high rate capacity (604.8 mAh g–1 at 2000 mA g–1), and prolonged cycling life (maintaining 1120.2 mAh g–1 at 500 mA g–1 for 100 cycles) for LIBs, which are much better than those of Fe3O4C coreshell nanospindles and Fe3O4 nanoparticles. The present Fe3O4Fe3C–C yolk–shell nanospindles are the most efficient Fe3O4-based anode materials ever reported for LIBs. 其他題名： ACS Nano 出版者： United States: American Chemical Society 出版日期： 2015-03-24 出處： ACS nano, 2015-03, Vol.9 (3), p.3369-3376 資源來源： American Chemical Society Journals 版權： Copyright © 2015 American Chemical Society 識別號： ISSN: 1936-0851 識別號： ISSN: 1936-086X 識別號： EISSN: 1936-086X 識別號： DOI: 10.1021/acsnano.5b00760 識別號： PMID: 25716070
顯示於類別:	[大氣科學學系] 期刊論文

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