Nickel-cobalt-manganese ternary precursor and preparation method and application thereof

• Main Authors: QIU TIAN, ZHAO ZIHAN, LIU MEIHONG, XIA JILI, CAI ZENGFU, WU GUOJUN, ZHOU WENJIE
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a nickel-cobalt-manganese ternary precursor and a preparation method and application thereof. The nickel-cobalt-manganese ternary precursor comprises an inner core and a coating layer formed by stacking a plurality of primary particles on the surface of the inner core, the porosity of the inner core is larger than that of the coating layer, the particle size of the inner core is smaller than or equal to 1 micron, and the ratio of the radius of the inner core to the thickness of the coating layer is smaller than or equal to 1: 2.75. The nickel-cobalt-manganese ternary precursor disclosed by the invention not only has an ultralow specific surface area of less than 5m < 2 >/g, but also has excellent dispersity and uniformity, and can reduce the specific surface area of a positive electrode material when being used for preparing the positive electrode material, so that the cycle performance of a battery is improved. 本发明涉及一种镍钴锰三元前驱体及其制备方法和应用。所述镍钴锰三元前驱体包括内核以及由多个一次颗粒堆叠于所述内核表面形成的包覆层，所述内核的孔隙率大