Synthesis and Electrochemical Properties of LiFeSO4F/graphene Composite as Cathode Material for Lithium-ion Batteries

Authors

Wei GUO
Ya-Xia YIN
Li-Jun WAN
Yu-Guo GUOFollow

Corresponding Author

Yu-Guo GUO(ygguo@iccas.ac.cn)

Abstract

The LiFeSO4F was successfully synthesized from the reactions of FeSO4?xH2O (x=1, 4, 7) with LiF in tetraethylene glycol media through a facile low temperature method. The structures and microscopic features of the products were characterized by XRD, SEM and TEM. TGA result shows the good thermal stability of the as-prepared LiFeSO4F. No diffraction peaks of the FeSO4 are observed in the as-prepared products with the starting material of either FeSO4?4H2O or FeSO4?7H2O, which should be ascribed to delaying the release of H2O from the hydrated compounds. Cyclic voltammetry (CV) curves and electrochemical impedance spectroscopy (EIS) results prove that the LiFeSO4F/graphene composite exhibit less electrochemical polarization and smaller impedance than those of pure LiFeSO4F, in which the graphene serves as the electronic conductivity support to enhance the lithium storage properties. The LiFeSO4F/graphene composite shows a high specific capacity, good rate capability and cycling stability compared with the pure LiFeSO4F.

Graphical Abstract

Keywords

Lithium-ion batteries, LiFeSO4F, graphene, electrochemical performances, cathode

DOI Link

https://doi.org/10.61558/2993-074X.2891

Publication Date

2012-04-28

Online Available Date

2012-01-15

Revised Date

2011-12-29

Received Date

2011-11-24

Recommended Citation

Wei GUO, Ya-Xia YIN, Li-Jun WAN, Yu-Guo GUO. Synthesis and Electrochemical Properties of LiFeSO4F/graphene Composite as Cathode Material for Lithium-ion Batteries[J]. Journal of Electrochemistry, 2012 , 18(2): Article 5.
DOI: 10.61558/2993-074X.2891
Available at: https://jelectrochem.xmu.edu.cn/journal/vol18/iss2/5

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