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用热重分析方法并配合中间产物及最终产物的物相鉴定，研究了ＬｉＣｏ１－ｘＮｉｘＯ２合成过程的机理及产物的结构和性能。碳酸锂和钴、镍的碱式碳酸盐，在共混后热合成ＬｉＣｏ１－ｘＮｉｘＯ２的过程分两步进行，第一步为碱式碳酸镍（钴）盐的热分解（＜３００℃），第二步（＞３００℃）包括碳酸锂的分解和ＬｉＣｏ１－ｘＮｉｘＯ２的合成。温度升高，合成产物中锂含量增加，晶格参数增大，生成物为具有单相结构的ＬｉＣｏＯ２和ＬｉＮｉＯ２固溶体。随着ＬｉＣｏ１－ｘＮｉｘＯ２中ｘ值的增加，晶格参数增大。合成过程中碳酸盐分解产生的ＣＯ对Ｃｏ＋＋、Ｎｉ＋＋氧化成Ｃｏ＋＋＋、Ｎｉ＋＋＋产生影响，因此合成的气氛和原料对产物有明显的影响。通过合成条件的优化得到的ＬｉＣｏ０．５Ｎｉ０．５Ｏ２和ＬｉＮｉＯ２放电量均可达到ＬｉＣｏＯ２的水平。
Thermogravimetric analysis and phase identification of the intermediate and the final product were used to investigate the mechanism of LiCo1-xNixO2 synthesis and the structure and properties of the product. The process of thermal synthesis of LiCo1-xNixO2 after blending is carried out in two steps. The first step is the thermal decomposition (<300 ℃) of basic nickel carbonate (cobalt) salt, The second step (> 300 ℃) includes the decomposition of lithium carbonate and the synthesis of LiCo1-xNixO2. When the temperature rises, the lithium content in the synthesized product increases, and the lattice parameter increases. The product is a solid solution of LiCoO2 and LiNiO2 having a single phase structure. With the increase of x in LiCo1-xNixO2, the lattice parameter increases. During the synthesis process, the CO produced by carbonate decomposition has an effect on the oxidation of Co ++ and Ni ++ to Co +++ and Ni +++. Therefore, the synthesis atmosphere and raw materials have a significant effect on the product. LiCo0.5Ni0.5O2 and LiNiO2 can be discharged to LiCoO2 by the optimization of synthesis conditions.