The present invention relates to the field of lithium batteries, and provides a lithium-ion battery cathode material having a core-shell structure, and preparation method thereof; the shell structure of the cathode material is composed of polyanionic lithium salt, having the chemical formula LiβRAO4; the core structure of the cathode material is composed of a ternary composite cathode material, having the structural formula LiαNixCoyM1-y-xO2; R is selected from Mn and/or Fe, A is P and/or Si, and M is Mn and/or Al. The present invention provides a positive electrode plate, a lithium-ion battery, and application thereof. The composite anode material of the lithium-ion battery of the core-shell structure provided by the present invention has a shell structure material of iron-based polyanionic lithium salt, has a very stable microscopic crystal structure, has octahedral and tetrahedral vacancies in its crystal structure providing a large number of channels for lithium-ion shuttling, and has a material which still ensures the stability of the material at 600°C; the battery has good safety performance during use.
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机译：本发明涉及锂电池领域，并提供具有芯壳结构的锂离子电池阴极材料，及其制备方法;阴极材料的壳结构由聚阴离子锂盐组成，具有化学式Li β Rao 4 ;阴极材料的芯结构由三元复合阴极材料组成，具有结构式Li α Ni x Co Y M 1-yx O 2 ; R选自Mn和/或Fe，A是P和/或Si，M是Mn和/或Al。本发明提供了一种正电极板，锂离子电池及其应用。本发明提供的芯壳结构的锂离子电池的复合阳极材料具有铁基聚阳锂锂盐的壳结构材料，具有非常稳定的微观晶体结构，在其晶体中具有八面体和四面体空位提供大量用于锂离子穿梭通道的结构，并且具有仍然可确保材料在600°C处的稳定性;电池在使用过程中具有良好的安全性能。
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