Facile synthesis of nanocrystalline LiFePO4/graphene composite as cathode material for high power lithium ion batteries

We describe a simple strategy, which is based on the idea of space confinement, for the synthesis of carbon coating on LiFePO4 nanoparticles/graphene nanosheets composites in a water-in-oil emulsion system. The prepared composite displayed high performance as a cathode material for lithium-ion batter...

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Bibliographic Details
Published in:Electrochimica acta 2014-06, Vol.130, p.594-599
Main Authors: Mo, Runwei, Lei, Zhengyu, Rooney, David, Sun, Kening
Format: Article
Language:English
Subjects:
Cathode
Graphene
Lithium-Ion Batteries
Nanocrystalline
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Summary:We describe a simple strategy, which is based on the idea of space confinement, for the synthesis of carbon coating on LiFePO4 nanoparticles/graphene nanosheets composites in a water-in-oil emulsion system. The prepared composite displayed high performance as a cathode material for lithium-ion battery, such as high reversible lithium storage capacity (158mAhg−1 after 100 cycles), high coulombic efficiency (over 97%), excellent cycling stability and high rate capability (as high as 83mA h g−1 at 60C). Very significantly, the preparation method employed can be easily adapted and be extended as a general approach to sophisticated compositions and structures for the preparation of highly dispersed nanosized structure on graphene.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2014.03.025