POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY METHOD OF PREPARING SAME AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME

• Main Authors: KIM YOUNG KI, CHAE YOUNGJOO, HONG MINGZI, LEE SOONREWL, PARK JUNGJOON, HONG SOONKIE, CHOI ICKKYU
• Format: Patent
• Language: English; Korean
• Published: 13.05.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

According to one embodiment, provided is a positive electrode active material for a lithium secondary battery, comprising a nickel-based lithium transition metal oxide including secondary particles in which a plurality of primary particles are aggregated, wherein the secondary particles include a core and a surface layer surrounding the core. The surface layer comprises the plurality of primary particles and nano-sized cobalt-based lithium transition metal oxide between the primary particles. 일 구현예에 따라, 복수의 1차 입자가 응집된 2차 입자를 포함하는 니켈계 리튬 전이금속 산화물을 포함하고, 2차 입자는 코어와 코어를 둘러싸는 표면층을 포함하고, 표면층은 복수의 1차 입자 및 상기 1차 입자 사이에 나노 사이즈의 코발트계 리튬 전이금속 산화물을 포함하는, 리튬 이차 전지용 양극 활물질을 제공한다.