Issue 10, 2011
From the journal:

Journal of Materials Chemistry

Graphene modified LiFePO4 cathode materials for high power lithium ion batteries

Xufeng Zhou,a   Feng Wang,b   Yimei Zhub  and  Zhaoping Liu*a  

* Corresponding authors

a Ningbo Institute of Material Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo, P. R. China
E-mail: liuzp@nimte.ac.cn
Fax: + 86 574 86685096

b Brookhaven National Laboratory, Upton, New York, USA

Abstract

Graphene-modified LiFePO4 composite has been developed as a Li-ion battery cathode material with excellent high-rate capability and cycling stability. The composite was prepared with LiFePO4 nanoparticles and graphene oxide nanosheets by spray-drying and annealing processes. The LiFePO4 primary nanoparticles embedded in micro-sized spherical secondary particles were wrapped homogeneously and loosely with a graphene 3D network. Such a special nanostructure facilitated electron migration throughout the secondary particles, while the presence of abundant voids between the LiFePO4 nanoparticles and graphene sheets was beneficial for Li+ diffusion. The composite cathode material could deliver a capacity of 70 mAh gāˆ’1 at 60C discharge rate and showed a capacity decay rate of <15% when cycled under 10C charging and 20C discharging for 1000 times.

Graphical abstract: Graphene modified LiFePO4 cathode materials for high power lithium ion batteries

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Article information

DOI
https://doi.org/10.1039/C0JM03287E
Article type
Paper
Submitted
30 Sep 2010
Accepted
03 Dec 2010
First published
24 Jan 2011

J. Mater. Chem., 2011,21, 3353-3358

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Graphene modified LiFePO4 cathode materials for high power lithium ion batteries

X. Zhou, F. Wang, Y. Zhu and Z. Liu, J. Mater. Chem., 2011, 21, 3353 DOI: 10.1039/C0JM03287E

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