Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 20, Issue 7, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-018-4298-z
Keywords
In situ coating; Ionic liquid; Lithium ion batteries; LiFePO4; Electrochemistry; Energy storage
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Funding
- National Nature Science Foundation of China (NFSC) [51364024, 51404124]
- Natural Science Foundation of Gansu Province [1506RJZA100]
- Foundation for Innovation Groups of Basic Research in Gansu Province [1606RJIA322]
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LiFePO4/C materials were synthesized via an in situ coating on LiFePO4 with 1-butyl-3-methylimidazolium dicyanamide [BMIm][N(CN)(2)] as a carbon source. The electrode materials were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results revealed that 1-2 nm carbon films were successfully coated on the LiFePO4 particles. The electrochemical properties of LiFePO4/C composite were investigated by cyclic voltammetry (CV) curves, electrochemical impedance spectra (EIS), and electrochemical analysis. The test results showed that the LiFePO4/C composite possessed outstanding reversibility, cycle performance, and rate performance. The discharge capacities of LiFePO4/C were 161.5 mAh g(-1) at 0.1 C and 143.6 mAh g(-1) at 1 C, respectively. The excellent electrochemical properties of the LiFePO4/C electrode were mainly due to the thin, uniform, and highly graphitized carbon films.
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