Li2MnSiO4/C Nanocomposite Prepared by Resorcinol-Formaldehyde Assisted Sol-Gel Method

Li2MnSiO4/C nanocomposite was prepared by a resorcinol-formaldehyde assisted Sol-Gel method. The crystalline structure, morphology and electrochemical performances of the products were characterized by X-ray dif- fraction (XRD), scanning electron microscope (SEM) and galvanostatic charge/discharge test. The results demonstrate that the as-prepared nanocomposite has a highly pure Pmn21 orthorhombic structure with uniformly distributed particle size of about 50 nm and exhibits good electrochemical performance. Li2MnSiO4/C cathode can deliver an initial dis- charge capacity of 105.7 mAh/g with 90.7% capacity retention over 50 charge-discharge cycles. It is also found that the crystalline structure of Li2MnSiO4 almost remains stable after charge-discharge cycling, indicating that the coated carbon layer formed by pyrolysis of resorcinol-formaldehyde can not only enhance the electronic conductivity, but also maintain the structural stability of the Li2MnSiO4/C nanocomposite.