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CN108963247A 一种高电压锂离子电池NCA正极材料的制备方法及产品 无效 - 驳回 转让

一种高电压锂离子电池NCA正极材料的制备方法及产品
摘要：
本发明提供一种高电压锂离子电池NCA正极材料的制备方法及产品，其中方法包括如下步骤：(1)共沉淀法制备前驱体Ni1‑y‑zCoyAlz(OH)2，其中：0.05≤y≤0.15，0≤z≤0.05；(2)气氛炉热处理使步骤(1)制得的前驱体脱水，得脱水前驱体Ni1‑y‑zCoyAlzO2；(3)分段烧结制备LixNi1‑y‑zCoyAlzO2正极材料；(4)采用磷酸和草酸组成的混合液清洗正极材料表面的残余锂，即得。本发明还提供采用上述方法制备的NCA正极材料和包含该NCA正极材料的高电压锂离子电池。本发明的制备方法，对合成设备要求低，操作简单，烧结工艺无特殊要求，制得的正极材料具有加工性能好、过剩锂低、容量高和循环性能好等优点。
摘要（英）：

The invention provides a preparation method and a product of NCA cathode material of a high-voltage lithium ion battery, wherein the method comprises the following steps: (1) preparing precursor Ni1;Y-ZCoyAlz (OH) 2, where: 0.05 <= y <= 0. 15, 0 <= z <= 0. 05; (2) dehydrating the precursor prepared in the step (1) by heat treatment in an atmosphere furnace to obtain a dehydrated precursor Ni 1-Y-ZCoyAlzO2; (3) Preparation of LixNi1-Y-ZCoyAlzO2 cathode material; (4) cleaning the residual lithium on the surface of the cathode material with a mixed solution of phosphoric acid and oxalic acid toobtain. The invention also provides an NCA cathode material prepared by the method and a high-voltage lithium ion battery comprising the NCA cathode material. The preparation method of the invention has the advantages of low requirements on the synthesis equipment, simple operation, no special requirements on the sintering process, good processing performance, low excess lithium, high capacity andgood cycle performance, etc.

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