Electrochemical Performance of Li4Ti5O12/TiO2/Li0.4TiO2/C Composite Prepared by the Electrospinning Method Using as Lithium Battery Anode Material
Li4Ti5O12(LTO) and Li4Ti5O12/TiO2/Li0.4TiO2/C (LTO/C) composite were prepared by the electrospinning method using acetic acid, ethanol, butyl titanate, lithium acetate and PVP (K90) as the raw materials. The phase structure and the morphology were characterized by the X-ray diffraction (XRD) and the scanning electron microscopy (SEM), respectively. It was found that the specific capacity was 356mAh/g at 0.5C for the composite, which was higher than the theoretical specific capacity of the pure Li4Ti5O12 due to the inclusion of other phase. Moreover, the C-rate performance for the composite was also better than that of the pure Li4Ti5O12 resulting from the formation of carbon-based fiber structure. Electrochemical impedance spectra (EIS) revealed that the composite exhibited the improved electronic conductivity than that of Li4Ti5O12.