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Nitrogen-doped graphene guided formation of monodisperse microspheres of LiFePO4 nanoplates as the positive electrode material of lithium-ion batteries

Zhou, Yingke; Lu, Jiming; Deng, Chengji; Zhu, Hongxi; Chen, George Z.; Zhang, Shaowei; Tian, Xiaohui

Authors

Yingke Zhou

Jiming Lu

Chengji Deng

Hongxi Zhu

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GEORGE CHEN GEORGE.CHEN@NOTTINGHAM.AC.UK
Professor of Electrochemical Technologies

Shaowei Zhang

Xiaohui Tian



Abstract

Three-dimensional porous composite microspheres of LiFePO4 and nitrogen doped graphene have been synthesized by a solvothermal process coupled with subsequent calcination. The morphologies and microstructures of the composites are investigated by scanning electron microscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The electrochemical properties are evaluated by constant current charge/discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy. The unique porous structure of the microspheres is constructed by the assembly of nitrogen-doped graphene and LiFePO4 nanoplates, and can remarkably enlarge the electrode/electrolyte interface area, facilitate the electron transfer process, shorten the ionic diffusion path and accelerate the ionic transport throughout the electrode. In electrochemical measurements of specific charge capacity, rate capability and cycling stability, the obtained porous composite microsphere materials offer remarkably promising results for application in high-performance lithium-ion power batteries.

Journal Article Type Article
Publication Date Aug 21, 2016
Journal Journal of Materials Chemistry A
Print ISSN 2050-7488
Electronic ISSN 2050-7496
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 4
Issue 31
Pages 12065-12072
APA6 Citation Zhou, Y., Lu, J., Deng, C., Zhu, H., Chen, G. Z., Zhang, S., & Tian, X. (2016). Nitrogen-doped graphene guided formation of monodisperse microspheres of LiFePO4 nanoplates as the positive electrode material of lithium-ion batteries. Journal of Materials Chemistry A, 4(31), 12065-12072. https://doi.org/10.1039/C6TA03440C
DOI https://doi.org/10.1039/C6TA03440C
Publisher URL http://dx.doi.org/10.1039/C6TA03440C
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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