锂离子电池正极材料LiNi0.8Co0.15Mo0.05O2的制备与性能

摘要

利用具有低共熔组成的LiOH-LiNO3混合锂盐体系,与高密度前驱体混合,经3阶段恒温烧结制备出高密度锂离子电池正极材料LiNi0.8Co0.15Mo0.05O2.X射线衍射分析表明合成的材料具有规整的层状α-NaFeO2结构.SEM显示材料的颗粒均匀.电性能测试表明,在0.2C放电倍率和3.0～4.3V的电压范围内,LiNi0.8Co0.15Mo0.05O2首次放电比容量达175mAh/g,且具有良好的循环性能.%High tap-density cathode material LiNi0.8Co0.15Mo0.05O2 has been successfully prepared by a molten-salt synthesis method, X-ray diffraction analysis shows that this material has a well-developed layered structure. Scanning electron microscopy indicates that the synthesized particles distribute evenly. Charge-discharge tests show that LiNi0.8 Co0. 15 Mo0.05O2 has an initial discharge capacity as high as 175mAh/g and excellent capacity retention in the range 3. 0—4. 3V at a specific current of 0. 2C.