Ternary positive electrode material of lithium ion battery, preparation method of ternary positive electrode material and lithium ion battery

• Main Authors: CAO WENYU, FU QIANG, FAN YUQI, CHEN JINGHUA
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a ternary positive electrode material of a lithium ion battery, a preparation method of the ternary positive electrode material and the lithium ion battery. The particle surface of the ternary positive electrode material is of a lamellar structure, and the lamellar structure is provided with a plurality of stacked lamellar units; the lamella thickness of each lamella unitis 100-200 nm, and the lamella length of each lamella unit is about 300-600 nm; and the D10 of the ternary positive electrode material is 1400-1800nm, the D90 of the ternary positive electrode material is 2900-3300nm, the D50 of the ternary positive electrode material is 2000-2500nm, and the specific surface area of the ternary positive electrode material is 18000-35000 cm /g. Compared with traditional secondary ball small particles, the lithium ion battery positive electrode material disclosed by the invention has better mechanical strength due to closer combination, and the unique graded lamellar structure of the li