High performed composites of LiFePO4/3DG/C based on FePO4 by hydrothermal method

High performed composites of LiFePO4/3DG/C based on FePO4 by hydrothermal method

Composites of spherical FePO4 and three-dimensional porous graphene (FP/3DG) were prepared through hydrothermal method, then the high-performed composites of three-dimensional graphene and LiFePO4 cathode materials (LFP/3DG/C) were prepared with the FP/3DG precursor by carbothermic reduction. Resear...

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Bibliographic Details
Published in:Electrochimica acta Vol. 246; pp. 322 - 328
Main Authors: Zhan, T.T., Jiang, W.F., Li, C., Luo, X.D., Lin, G., Li, Y.W., Xiao, S.H.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 20-08-2017
Elsevier BV
Subjects:
Carbothermic reactions
Composite materials
Composites
Density
Discharge
Electrochemical analysis
Electrochemical performance
Graphene
Graphite
Hydrothermal method
Porosity
Spherical FePO4
Three dimensional composites
Three-dimensional porous Graphene
Three-dimensional porous Graphene
Spherical FePO4
Electrochemical performance
Composites
Hydrothermal method
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Summary:Composites of spherical FePO4 and three-dimensional porous graphene (FP/3DG) were prepared through hydrothermal method, then the high-performed composites of three-dimensional graphene and LiFePO4 cathode materials (LFP/3DG/C) were prepared with the FP/3DG precursor by carbothermic reduction. Researches on the structure, morphology and electrochemical performance of the materials were carried out by XRD, SEM, Raman, EIS, CV and charge-discharge tests. The results show that the LFP/3DG/C composites exhibit excellent rate and cycling capabilities. At the current density of 0.2C, the first charge/discharge specific capacities were 167.2mAh/g and 165.1mAh/g, respectively, and the capacities remained 99.3% after 50 cycles; The discharge capacity was 144.7mAh/g and the capacity remains 99.6% after 100 cycles at 1C rate, while the discharge capacity was 91.3mAh/g at 10C rate. Compared with LFP/C materials, the LFP/3DG/C composites showed obvious improvement in rate capability and cycling stability.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.05.151