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Issue 10, 2011
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Graphene modified LiFePO4 cathode materials for high power lithium ion batteries

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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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Publication details

The article was received on 30 Sep 2010, accepted on 03 Dec 2010 and first published on 24 Jan 2011


Article type: Paper
DOI: 10.1039/C0JM03287E
Citation: 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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