期刊
SOLID STATE IONICS
卷 181, 期 37-38, 页码 1685-1689出版社
ELSEVIER
DOI: 10.1016/j.ssi.2010.09.056
关键词
LiFePO4; Graphene; Mixed conducting; Network; Lithium-ion batteries
资金
- Chinese Academy of Sciences
- National Natural Science Foundation of China [20901044, 20971077, 20902052]
In this work, mixed (electron and ion) conducting LiFePO4/graphene composites have been prepared through a facile hydrothermal route followed by heat treatment. It was found that the LiFePO4 particles adhered to the surface of graphene and/or embedded in the graphene nanosheets. As a result, an effective three-dimensional conducting network was formed by bridging graphene nanosheets, which can facilitate electron transport effectively and thus improve the kinetics and rate performance of LiFePO4. The LiFePO4/graphene (92:8 wt.) composites exhibited a discharge capacity of 160.3 mAh g(-1) at 0.1 C and 81.5 mAh g(-1) at 10 C, respectively. The comparative investigation on LiFePO4/graphene composites and LiFePO4 proved that establishing a mixed conducting network with graphene has a potential to enhance the specific capacity and rate capability of LiFePO4. (C) 2010 Elsevier B.V. All rights reserved.
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