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发明公开
CN108963210A 一种碳包覆单晶三元正极材料的制备方法 无效 - 驳回

一种碳包覆单晶三元正极材料的制备方法
摘要：
本发明公开了一种碳包覆单晶三元正极材料的制备方法，包括以下步骤：S1：将单晶三元正极材料前驱体在氧气氛下下烧结，得到前驱体氧化物；S2：将前躯体氧化物破碎为一次颗粒；S3：将解离后的前驱体氧化物、锂源混合后进行一次烧结、二次烧结得到单晶三元正极材料基体；S4：将有机碳源及增塑剂配制成混合溶液，将单晶三元正极材料基体加入到混合溶液中，喷雾干燥，收集后得到有机物包覆单晶三元正极材料；S5：将有机物包覆单晶三元正极材料在惰性气氛下烧结，粉碎后得到碳包覆单晶三元正极材料LixNi1‑y‑zCoyMnzO2/C，1≤x≤1.1，0＜y≤1/3，0＜z≤1/3。本发明得到表面碳包覆完整、均匀的单晶三元正极材料，提高单晶三元正极材料的电子电导率和循环性能。
摘要（英）：

The invention discloses a preparation method of a carbon-coated single crystal ternary cathode material. The method includes: (S1) sintering a single crystal ternary cathode material precursor in oxygen atmosphere to prepare a precursor oxide; (S2) crushing the precursor oxide into primary granules; (S3) performing first sintering and secondary sintering to the dissociated precursor oxide and a lithium source to obtain a single crystal ternary cathode material substrate; (S4) preparing a mixed solution from the organic carbon source and a plasticizer, and adding the single crystal ternary cathode material substrate to the mixed solution, performing spray drying and collecting the product, organic-coated single crystal ternary cathode material; (S5) sintering the organic-coated single crystal ternary cathode material in an inert gas atmosphere, and crushing the product to obtain the carbon-coated single crystal ternary cathode material LixNi<1-y-z>CoyMnzO2/C, 1 <= x <= 1.1, 0 < y <= 1/3and 0 < z <= 1/3. The single crystal ternary cathode material is coated with the carbon completely and uniformly, so that electronic conductivity and cyclic performance of the single crystal ternarycathode material are enhanced.

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