Composite positive electrode material and preparation method and application thereof

• Main Authors: SEO YOUNG-IK, LIANG SHIHAN, LEE HENRY, KONG LINGYONG, LI YINENG, JUNG EUN-GYEONG
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a composite positive electrode material and a preparation method and application thereof, the composite positive electrode material comprises an inner core and a coating layer, and the inner core comprises a positive electrode active material; the outer surface of the inner core is coated with the coating layer, and the coating layer comprises a carbon material and a molecular sieve. The coating layer can protect and support the inner core and isolate the inner core from the outside, so that the stability of the composite positive electrode material is improved. The coating layer comprises the carbon material, and the carbon material has good conductivity, so that the electronic conductivity of the positive electrode active material is improved, and the rate capability of the positive electrode active material is improved. In addition, the coating layer further comprises a molecular sieve, transition metal and impurity metal elements dissolved out of the positive electrode active materi