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采用过渡金属醋酸盐在不同合成条件下制备LiNi0.8Co0.1Mn0.1O2正极材料。使用同步热重–差热–微分热重分析法研究过渡金属醋酸盐混合物。利用X射线粉末衍射和充放电测试对所制备的LiNi0.8Co0.1Mn0.1O2材料进行表征。过渡金属醋酸盐混合物在加热过程中经历脱水和分解。所有测试的LiNi0.8Co0.1Mn0.1O2样品均为层状结构,且具有R3m空间群。采用不同锂源和不同合成工艺制备的LiNi0.8Co0.1Mn0.1O2样品表现出的充放电性能差别很大。采用550°C预处理碳酸锂和过渡金属醋酸盐后在800°C烧结获得的样品在0.2C倍率下前20次充放电循环过程中的最高容量为200.8 m A·h/g,平均容量为188.1 m A·h/g。
LiNi0.8Co0.1Mn0.1O2 cathode materials were prepared under different synthesis conditions by using transition metal acetate. Study on Transition Metal Acetate Mixtures Using Simultaneous TGA - DTA - Differential Thermogravimetry. The prepared LiNi0.8Co0.1Mn0.1O2 materials were characterized by X-ray powder diffraction and charge-discharge test. Transition metal acetate mixtures undergo dehydration and decomposition during heating. All samples tested LiNi0.8Co0.1Mn0.1O2 are layered structure, and have R3m space group. LiNi0.8Co0.1Mn0.1O2 samples prepared with different lithium sources and different synthetic processes showed very different charge and discharge performance. After 550 ° C pretreatment of lithium carbonate and transition metal acetate after sintering at 800 ° C samples at 0.2C rate the first 20 times during the charge-discharge cycle maximum capacity of 200.8 mA · h / g, the average capacity 188.1 m A · h / g.