【摘要】 高镍三元正极材料（NCM811）具备较高的能量密度等优点受到广泛关注。Ni_0.8Co_0.1Mn_0.1（OH）₂作为NCM811的前驱体，其结构、形貌等直接影响NCM811的结构和电化学性能。本文以Ni_0.8Co_0.1Mn_0.1（OH）₂前驱体为研究对象，研究了配位剂用量、合成温度、p H值、搅拌速度等条件对前驱体物相结构、形貌及正极材料电化学性能的影响，得到合成NCM811前驱体的最佳工艺条件。结果表明，最优的配位剂用量4 mol·L^-1、p H 11～11.5、搅拌速度1040 r·min^-1、反应温度50℃，将在此条件下制备的前驱体锂化预热、烧结获得的正极材料在0.2 C时放电容量高达198.5 m Ah·g^-1,10 C时放电容量为132.7 m Ah·g^-1。更多还原

【Abstract】 High nickel ternary cathode material （NCM811） has attracted extensive attention due to its high energy density.Ni_0.8Co_0.1Mn_0.1（OH）₂ is used as the precursor of the cathode material,which structure and morphology directly affect the structure and electrochemical performance of NCM811.Therefore,Ni_0.8Co_0.1Mn_0.1（OH）₂ precursor was taken as the research object in this paper,and the effects of the amount of coordination agent,synthesis temperature,p H value,stirring speed and other conditions on the phase structure,morphology and electrochemical performance of the precursor were studied.The optimum conditions for synthesizing the precursor of Ni_0.8Co_0.1Mn_0.1（OH）₂ were obtained.The results showed that the optimum amount of coordination agent was 4 mol·L^-1,p H 11～11.5,the stirring speed was 1040 r·min^-1,and the reaction temperature was 50℃.The discharge capacity of the cathode material prepared under this condition was 198.5 m Ah·g^-1at 0.2 C and 132.7 m Ah g^-1 at 10 C.更多还原