COMPOSITE CATHODE ACTIVE MATERIAL, CATHODE AND LITHIUM BATTERY CONTAINING COMPOSITE CATHODE ACTIVE MATERIAL AND PREPARATION METHOD THEREOF

• Main Authors: KAPYLOU, Andrei, MAH, Sangkook, MOON, Jongseok, SHIM, Kyueun, KIM, Guesung, SON, Inhyuk, PARK, Jinhwan, JO, Sungnim
• Format: Patent
• Language: English; French; German
• Published: 31.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided are a composite cathode active material, a cathode and a lithium battery containing the composite cathode active material, and a preparation method of the composite cathode active material, the composite cathode active material including: a first core including a first lithium transition metal oxide; a second core including a second lithium transition metal oxide; and a shell disposed along a surface of at least one of the first core and the second core, wherein the shell includes at least one first metal oxide represented by Formula MaOb (0<a≤3, 0<b<4, wherein if a is 1, 2, or 3, b is not an integer); and a carbonaceous material, wherein the first metal oxide is disposed within a carbonaceous metal matrix, M is at least one metal selected from among Groups 2 to 13, Group 15, and Group 16 of the Periodic Table, the first lithium transition metal oxide and the second lithium transition metal oxide have a different particle size from each other, and the second lithium transition metal oxide includes a primary particle having a particle size of about 1 µm or more.