Quasi-high-entropy multi-element layered transition metal oxide positive electrode material and preparation method and application thereof

• Main Authors: ZHANG LIDA, HUANG ZHENDONG, CAI YUQING, CHANG FANGFEI, BAI LING
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a high-entropy-like multi-element layered transition metal oxide positive electrode material and a preparation method and application thereof. The general formula of the material is as follows: Ax (M) yNzO2, A is an average combination of one or more than two of alkali metal elements, M is an average combination of three or more than three of low-electronegativity transition metal elements, N is an average combination of one or more than two of high-electronegativity elements, x is between 0.4 and 1.0, y is between 0.01 and 0.5, z is between 0.2 and 0.9, and y is between 0.01 and 0.5. A precursor can be prepared through ball milling, freeze-drying, solvothermal, sol-gel or coprecipitation and then annealed at high temperature to obtain a final product. The material contains five or more transition metal elements, has a large amount of lattice distortion and relatively high entropy, can inhibit structural collapse in the charging and discharging process, gives full play to the advantage