Sheet-like structure FeF sub(3)/graphene composite as novel cathode material for Na ion batteries

A sheet-like structure FeF sub(3)/graphene composite is successfully synthesized by a novel and facile sol-gel method. The structure and electrochemical performance of the as-synthesized FeF sub(3)/graphene composite are investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), tr...

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Bibliographic Details
Published in:RSC advances 2015-04, Vol.5 (48), p.38277-38282
Main Authors: Shen, Yongqiang, Wang, Xianyou, Hu, Hai, Jiang, Miaoling, Bai, Yansong, Yang, Xiukang, Shu, Hongbo
Format: Article
Language:English
Subjects:
Cathodes
Chemical bonds
Composite materials
Electric batteries
Fourier transforms
Graphene
Infrared
Scanning electron microscopy
Transmission electron microscopy
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Summary:A sheet-like structure FeF sub(3)/graphene composite is successfully synthesized by a novel and facile sol-gel method. The structure and electrochemical performance of the as-synthesized FeF sub(3)/graphene composite are investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and electrochemical measurement. The results indicate that the FeF sub(3) nanosheets are loaded on the surface of the graphene sheets to form the sheet-like structure hybrid. Fourier transform infrared (FTIR) spectrum confirms that C-F bonds exist in FeF sub(3)/graphene composite, and it further indicates that a chemical bond between FeF sub(3) and graphene has been formed and FeF sub(3) can preferably stick to the surface of the graphene. The FeF sub(3)/graphene composite as cathode material of rechargeable Na ion batteries (NIB) exhibits a fairly high initial discharge capacity of 550 mA h g super(-1) at 0.1 C, and it still keeps a capacity of 115 mA h g super(-1) after 50 cycles at 0.3 C at a range of 1.0-4.0 V for NIB.
ISSN:2046-2069
DOI:10.1039/c5ra02235e