Issue 41, 2015

High-rate electrode material 2LiFePO4·Li3V2(PO4)3@carbon/graphene using the in situ grown Fe4(VO4)4·15H2O precursor on the surface of graphite oxide

Abstract

2LiFePO4·Li3V2(PO4)3@carbon/graphene (2LFP·LVP@C/G) as a cathode material, based on an in situ grown Fe4(VO4)4·15H2O precursor on the surface of graphene oxide, was synthesized by a solid-state process. The X-ray diffraction Rietveld refinement and Raman spectroscopy results indicated that multi-phase structural 2LiFePO4·Li3V2(PO4)3 with a carbon/graphene coating was obtained. The morphology is characterized by HRTEM tests, which reveal well crystallized 2LFP·LVP@C/G with bridging graphene nanosheets, forming an effective three-dimensional conducting network. Compared with 2LiFePO4·Li3V2(PO4)3@carbon (2LFP·LVP@C), the electrochemical results demonstrate that the 2LFP·LVP@C/G electrode measured at 0.1 C and 10 C can deliver a high specific discharge capacity of 151.2 mA h g−1 and 125.4 mA h g−1, respectively, and has a discharge capacity of 100.2 mA h g−1 at −30 °C at 0.1 C, indicating better rate capability and thermal properties.

Graphical abstract: High-rate electrode material 2LiFePO4·Li3V2(PO4)3@carbon/graphene using the in situ grown Fe4(VO4)4·15H2O precursor on the surface of graphite oxide

Article information

Article type
Communication
Submitted
11 Feb 2015
Accepted
30 Mar 2015
First published
31 Mar 2015

RSC Adv., 2015,5, 32191-32197

Author version available

High-rate electrode material 2LiFePO4·Li3V2(PO4)3@carbon/graphene using the in situ grown Fe4(VO4)4·15H2O precursor on the surface of graphite oxide

B. Zhang, H. Li and J. Zhang, RSC Adv., 2015, 5, 32191 DOI: 10.1039/C5RA02659H

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