Sol-gel synthesis of Li 2 MnSiO 4 /C nanocomposite with improved electrochemical performance for lithium-ion batteries

摘要: In recent years, modifying anode materials surfaces of Li 2 MnSiO 4 become a popular pursuit. This paper reveals fast sol-gel process that the in situ coated with carbon membrane prepared using liquid polyacrylonitrile (LPAN) as source. The structure and micro-morphology as-prepared /C nanocomposite were characterized by thermo-gravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) high-resolution transmission (HRTEM). electrochemical properties evaluated cyclic voltammetry (CV), galvanostatic charge/discharge impedance spectroscopy (EIS). results showed have good performance calcined 10 wt% LPAN insitu reached 225.6 mAh g−1 at room temperature. It is more than one (1.36Li+) transfer during intercalation/deintercalation process, corresponding to 68% its theoretical two-electron redox capacity (330 g−1).