中文摘要：

采用水热辅助溶胶凝胶法及球磨包碳技术合成Li2CoxMn1-xSiO4（x=0、0.1、0.3、0.5、1）与碳纳米管复合材料,X射线衍射（XRD）、扫描电镜（SEM）表征复合材料的结构与形貌.循环伏安（CV）、交流阻抗（EIS）、充放电曲线测试材料的电化学性能,并与Li2MnSiO4/C和Li2CoSiO4/C作对比.掺钴可以改善Li2MnSiO4电极的倍率放电性能.

英文摘要：

We have successfully synthesized Li2CoxMn1-xSiO4/C（x=0,0.1,0.3,0.5,1）/C composites using hydrothermal assisted sol-gel process and ball-milling method.The results of X-ray diffraction show that the solid solutions of Li2CoxMn1-xSiO4 can be achieved when x≤0.3.The initial capacity increases from 70 mAh·g-1 of Li2MnSiO4/C to 105 mAh·g-1 of Li2Co0.3Mn0.7SiO4/C.Cyclic Voltammetry（CV） curves show that the replacement of Mn with Co can reduce the electrochemical polarization,making the insertion-extraction reaction of Li＋ much easier.EIS results also prove that Co can decrease the charge transfer impedance of the materials.