Composite positive electrode active material and preparation method thereof, positive electrode and lithium battery

• Main Authors: JO SUNG NIM, MA XIANGGUO, SON IN-HYUK, SHIM KYU-EUN
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Disclosed are a composite positive electrode active material, a positive electrode and a lithium battery each including the composite positive electrode active material, and a method of preparing the composite positive electrode active material. The composite positive electrode active material includes: a first core including a first lithium transition metal oxide; a second core including a second lithium transition metal oxide; and a shell along a surface of at least one of the first core and the second core, the shell comprising a first metal oxide, a first carbonaceous material, and a second carbonaceous material, the first metal oxide being in a matrix of the first carbonaceous material, the first metal oxide being composed of the formula MaOb (0lt; a < = 3, 0lt; blt; and b is not an integer if a is 1, 2 or 3), and M is at least one metal selected from group 2 to group 13, group 15 and group 16 of the periodic table of elements. 公开了一种复合正电极活性物质、均包括该复合正电极活性物质的正电极和锂电池以及制备该复合正电极活性物质的方法。复合正电极活性物质包括：第一核，包括第一锂过渡