【摘要】 以二次干燥化学共沉淀法制得高密度前驱体Ni0.8Co0.2(OH)2,再与LiNO3混合经两个恒温阶段烧结(600℃恒温6h、800℃恒温24h)得到高密度LiNi0.8Co0.2O2。探讨了锂源、镍源、合成温度、合成时间等因素对产品的影响,从而优化了LiNi0.8Co0.2O2的合成工艺。所得非球形LiNi0.8Co0.2O2粉末振实密度高达3.24g/cm3,大幅度地提高正极材料的体积比能量。X射线衍射分析表明合成的LiNi0.8Co0.2O2具有规整的层状NaFeO2结构,预示着材料具有良好的电化学性能。更多还原

【Abstract】 Precursor-Ni0.8Co0.2(OH)2 with high tapping density was prepared by second stage drying method.High density LiNi0.8Co0.2O2 powders was synthesized by sintering the Ni0.8Co0.2(OH)2 and LiNO3 at 600℃ for 6h and 800℃ for 24h.The influences of preparation conditions such as raw materials,the mole ratio of Li/(Ni+Co),the sintering temperature and the reaction time of the product were discussed.The synthetic technology was optimized.The tap density of the prepared non-spherical LiNi0.8Co0.2O2 powder reaches 3.24g/cm3 and high tapping density leads to high volumetric specific capacity.XRD results show the material LiNi0.8Co0.2O2 with order NaFeO2 layer structure.It promises the material has good electrochemical performance.更多还原