Abstract：Multi-walled carbon nanotubes coated with SiO2 (MWCNTs@SiO2) were prepared by liquid phase method with carbon nanotubes and Si(OC2H5)4 as raw materials. By adjusting the amount of Si(OC2H5)4， MWCNTs@SiO2 precursors with different amount of silica were prepared， from which precursors of lithium iron silicate materials Li2FeSiO4/C were synthesized. By using X ray diffraction (XRD)， scanning electron microscopy (SEM)， transmission electron microscopy (TEM) and constant current charge discharge Li2FeSiO4/C materials were characterized with their electrochemical performance examined. Results showed that particle size of Li2FeSiO4/C materials synthesized from MWCNTs@SiO2 precursor with the silicon loading capacity of 35.72% were consistent， and stable discharge capacity of 180 mAh·g－1 was generated by these materials after 50 cycles in the current density of 0.1 C， which suggesting that these materials possess excellent electrochemical performance.
2017, Vol. 51 
