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CN105470455A 一种改性锂离子电池正极材料及其制备方法 无效 - 驳回 转让

一种改性锂离子电池正极材料及其制备方法
摘要：
本发明提供一种改性锂离子电池正极材料，其特征在于，以LiNi0.8Co0.15Al0.05O2为核，以含锂的复合氧化物为壳；所述含锂的复合氧化物为Li2TiO3、Li2SiO3、Li4SiO4、Li3PO4、Li4P2O7和Li2ZrO3中的一种或多种。本发明提供的表面改性的镍钴铝酸锂正极材料，在结构上采用了具有电子导电性或锂离子传导性的包覆材料作为壳体，使得改性材料具有传导锂离子性质的表面层，这些化学性质稳定的表面固溶层使得镍钴铝酸锂正极材料与电解液具有良好的界面相容性和界面结构稳定性，提高产品充放电循环稳定性。
摘要（英）：

The invention provides a modified lithium ion battery positive electrode material. The modified lithium ion battery positive electrode material is characterized in that LiNi0.8Co0.15Al0.05O2 is taken as a core and a lithium-containing composite oxide is taken as a shell; and the lithium-containing composite oxide is selected from one or more of Li2TiO3, Li2SiO3, Li4SiO4, Li3PO4, Li4P2O7 and Li2ZrO3. According to the surface modified nickel cobalt lithium aluminate positive electrode material provided by the invention, a coating material with electronic conductivity or lithium ion conductivity is taken as the shell, so that the modified material has a surface layer with a lithium ion conductivity property; a surface solid solution layer with stable chemical stability endows the nickel cobalt lithium aluminate positive electrode material and an electrolyte with high interfacial compatibility and interfacial structural stability, so that the charge-discharge cycling stability of the product is improved.

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