In Situ Coating on LiFePO 4 with Ionic Liquid as Carbon Source for High-Performance Lithium Batteries
Journal of Nanoparticle Research
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.
Xia, Jun, Fuliang Zhu, Gongrui Wang, Yanshuang Meng, Yue Zhang.
"In Situ Coating on LiFePO 4 with Ionic Liquid as Carbon Source for High-Performance Lithium Batteries."
Journal of Nanoparticle Research, 20 (7): 196.
doi: 10.1007/s11051-018-4298-z source: https://link.springer.com/article/10.1007%2Fs11051-018-4298-z