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Nano Research 2017, 10(9): 2923-2933 https://doi.org/10.1007/s12274-017-1502-x
Research Article | Issue | Published: 26 May 2017

Sandwich-structured nanocomposites of N-doped graphene and nearly monodisperse Fe3O4 nanoparticles as high-performance Li-ion battery anodes

Show Author's Information Wen Qi1,  Xuan Li2,  Hui Li3,  Weikang Wu3,  Pei Li2,  Ying Wu1,  Chunjiang Kuang1,  Shaoxiong Zhou1( ),  Xiaolin Li4( )
Beijing Key Laboratory of Energy NanomaterialsAdvance Technology & Materials Co.LtdChina Iron & Steel Research Institute GroupBeijing100081China
School of Materials Science and EngineeringTianjin UniversityTianjin300072China
Key Laboratory for Liquid-Solid Structural Evolution and Processing of MaterialsMinistry of EducationShandong UniversityJinan250061China
Department of Stationary Energy StoragePacific Northwest National LaboratoryRichlandWashington99354USA
Keywords:
density functional theory, self-assembly, N-doped graphene, Li-ion battery, iron oxides
Cite this article:
Qi W, Li X, Li H, et al. Sandwich-structured nanocomposites of N-doped graphene and nearly monodisperse Fe3O4 nanoparticles as high-performance Li-ion battery anodes. Nano Research, 2017, 10(9): 2923-2933. https://doi.org/10.1007/s12274-017-1502-x
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Abstract Full text Electronic supplementary material About this article

Iron oxides have attracted considerable interest as abundant materials for high-capacity Li-ion battery anodes. However, their fast capacity fading owing to poorly controlled reversibility of the conversion reactions greatly hinders their application. Here, a sandwich-structured nanocomposite of N-doped graphene and nearly monodisperse Fe3O4 nanoparticles were developed as high-performance Li-ion battery anode. N-doped graphene serves as a conducting framework for the self-assembled structure and controls Fe3O4 nucleation through the interaction of N dopants, surfactant molecules, and iron precursors. Fe3O4 nanoparticles were well dispersed with a uniform diameter of ~15 nm. The unique sandwich structure enables good electron conductivity and Li-ion accessibility and accommodates a large volume change. Hence, it delivers good cycling reversibility and rate performance with a capacity of ~1, 227 mA·h·g–1 and 96.8% capacity retention over 1, 000 cycles at a current density of 3 A·g–1. Our work provides an ideal structure design for conversion anodes or other electrode materials requiring a large volume change.


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About this article

Sandwich-structured nanocomposites of N-doped graphene and nearly monodisperse Fe3O4 nanoparticles as high-performance Li-ion battery anodes

Show Author's information Wen Qi1, Xuan Li2, Hui Li3, Weikang Wu3, Pei Li2, Ying Wu1, Chunjiang Kuang1, Shaoxiong Zhou1( ), Xiaolin Li4( )
Beijing Key Laboratory of Energy NanomaterialsAdvance Technology & Materials Co.LtdChina Iron & Steel Research Institute GroupBeijing100081China
School of Materials Science and EngineeringTianjin UniversityTianjin300072China
Key Laboratory for Liquid-Solid Structural Evolution and Processing of MaterialsMinistry of EducationShandong UniversityJinan250061China
Department of Stationary Energy StoragePacific Northwest National LaboratoryRichlandWashington99354USA

Abstract

Iron oxides have attracted considerable interest as abundant materials for high-capacity Li-ion battery anodes. However, their fast capacity fading owing to poorly controlled reversibility of the conversion reactions greatly hinders their application. Here, a sandwich-structured nanocomposite of N-doped graphene and nearly monodisperse Fe3O4 nanoparticles were developed as high-performance Li-ion battery anode. N-doped graphene serves as a conducting framework for the self-assembled structure and controls Fe3O4 nucleation through the interaction of N dopants, surfactant molecules, and iron precursors. Fe3O4 nanoparticles were well dispersed with a uniform diameter of ~15 nm. The unique sandwich structure enables good electron conductivity and Li-ion accessibility and accommodates a large volume change. Hence, it delivers good cycling reversibility and rate performance with a capacity of ~1, 227 mA·h·g–1 and 96.8% capacity retention over 1, 000 cycles at a current density of 3 A·g–1. Our work provides an ideal structure design for conversion anodes or other electrode materials requiring a large volume change.

Keywords: density functional theory, self-assembly, N-doped graphene, Li-ion battery, iron oxides

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Publication history
Copyright
Acknowledgements

Publication history

Received: 11 October 2016
Revised: 12 January 2017
Accepted: 31 January 2017
Published: 26 May 2017
Issue date: September 2017

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017

Acknowledgements

Acknowledgements

The authors would like to acknowledge financial supports from the National High-tech R & D Program of China (863 Program) (Nos. 2013AA032002 and 2015AA034601), China Iron & Steel Research Institute Group Foundation (No. SHI11AT0540A) and Advance Technology & Materials Co., Ltd Innovation Foundations (No. 2013JA02PYF).

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