COMPOSITE CATHODE ACTIVE MATERIAL, CATHODE AND LITHIUM BATTERY WHICH EMPLOY SAME, AND PREPARATION METHOD THEREFOR

• Main Authors: KAPYLOU, Andrei, SON, In Hyuk, KIM, Gue Sung, MOON, Jong Seok, MAH, Sang Kook, JO, Sung Nim
• Format: Patent
• Language: English; French; German
• Published: 17.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A composite cathode active material, a cathode and a lithium battery that include the composite cathode active material, and a method of preparing the composite cathode active material. The composite cathode active material includes: a 1st core including a first lithium transition metal oxide; a 2nd core including a second lithium transition metal oxide; and a shell disposed along a surface of at least one of the 1st core and the 2nd core, wherein the shell includes: at least one first metal oxide represented by Formula MaOb (where 0<a≤3, 0<b<4, and when a is 1, 2, or 3, b is not an integer); and a carbon-based material, the at least one first metal oxide is disposed in a matrix of the carbon-based material, M is at least one metal selected from Groups 2 to 13, 15, and 16 of the Periodic Table of Elements, and the first lithium transition metal oxide and the second lithium transition metal oxide have a different average particle diameter from each other.