中文摘要：

采用溶胶凝胶法制备了锂离子电池正极材料Li3＋xMnxV2-x（PO4）3（x=0、0.05、0.10、0.20）。通过X射线衍射（XRD）和扫描电子显微镜（SEM）分别对材料的结构及表面形貌进行了表征,结果表明：Li3＋xMnxV2-x（PO4）3与Li3V2（PO4）3具有相同的结构,均属单斜晶系P21/n,且随着锰含量的增加,样品的颗粒变大。循环伏安和充放电测试结果表明,随着锰含量的增加,样品的首次比容量减少,但Li3.1Mn0.1V1.9（PO4）3循环性能较好,说明少量Mn的掺杂可以改善Li3V2（PO4）3的循环性能。

英文摘要：

Li-ion battery cathode materials Li3＋xMnxV2-x（PO4）3（x=0,0.05,0.10,0.20） were synthesized by sol-gel method.The structure and morphology of samples were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The electrochemical behaviors were characterized by galvanostatic charge/discharge and cyclic voltammetry.The results show that the particle size of products are increased by adding small amountof Mn in Li3V2（PO4）3,but the crystal structure does not changed comparing with Li3V2（PO4）3 without Mn2＋.The initial ca-pacity of Li3＋xMnxV2-x（PO4）3 decreases with the Mn content increasing,however,Li3.1Mn0.1V1.9（PO4）3 displays a more stable cycle performance than Li3V2（PO4）3,which indicates that a small mount of Mn doping can enhance its cycle stability.