中文摘要：

以Li2CO3、NiO、Co2O3、MnO2、LiF和SiO2为原料,采用机械力活化固相法制备了Si4＋和F-掺杂的锂离子电池正极材料LiNi1/3Co1/3Mn1/3O2。通过X射线衍射（XRD）、扫描电镜（SEM）和电化学性能测试等技术研究了LiNi1/3Co1/3Mn1/3O2的结构特征、形貌及电化学性能等。结果表明：掺杂离子的引入没有改变材料的晶型结构,通过机械力活化后的材料分散更均匀,颗粒也较小,其中Li（Ni1/3Co1/3Mn1/3）0.98Si0.02O1.96F0.04的电化学性能最佳,首次放电比容量达157.5 mA.h/g,充放电循环过程中最高放电比容量为173.3 mA.h/g,循环50次后,容量保持率达96.19%,循环稳定性好。

英文摘要：

The layered LiNi1/3Co1/3Mn1/3O2 cathode materials doped by Si4＋ and F- were synthesized by solid state of mechanical activation method using Li2CO3,NiO,Co2O3,MnO2,LiF and SiO2 as the raw materials.The bare sample and doping composites were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and charge-discharge test.The results show that doping does not change the crystal of materials,the doped samples have a smaller grain sizes and uniform distributions,furthermore,the composite Li（Ni1/3Co1/3Mn1/3）0.98Si0.02O1.96F0.04 has a good electrochemical performance,which exhibits initial capacity of 157.5 mA·h/g,and the capacity retains 96.19% after 50 cycles.Through the process of the cycles,the highest discharge specific capacity arrives at 173.3 mA·h/g.