POSITIVE ELECTRODE ACTIVE MATERIAL, AND POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: CHO, Hyeon Jin, YOO, Tae Gu, JUNG, Hae Jung, JO, Chi Ho, HEO, Jong Wook, JUNG, Wang Mo, HWANG, Jin Tae
• Format: Patent
• Language: English; French; Korean
• Published: 29.06.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a positive electrode active material which comprises a lithium composite transition metal oxide in the form of a single particle made of one nodule and/or a quasi-single particle which is an aggregate of at most 30 nodules, wherein the lithium composite transition metal oxide comprises Ni, Co, Mn, and Al, the molar ratio of Ni relative to the total number of moles of metal elements except for lithium is at least 0.83 and less than 1, the ratio of the number of moles of Co relative to the number of moles of Mn is at least 0.5 and less than 1, and the ratio of the number of moles of Co relative to the number of moles of Al is 5 to 15. La présente invention concerne un matériau actif d'électrode positive qui comprend un oxyde de métal de transition composite de lithium sous la forme d'une particule unique constituée d'un nodule et/ou d'une particule quasi-unique qui est un agrégat d'au plus 30 nodules, l'oxyde de métal de transition composite de lithium comprenant Ni, Co, Mn et Al, le rapport molaire de Ni par rapport au nombre total de moles d'éléments métalliques à l'exception du lithium étant d'au moins 0,83 et inférieur à 1, le rapport du nombre de moles de Co par rapport au nombre de moles de Mn étant d'au moins 0,5 et inférieur à 1, et le rapport du nombre de moles de Co par rapport au nombre de moles d'Al étant de 5 à 15. 본 발명은, 1개의 노듈로 이루어진 단입자 및/또는 30개 이하의 노듈들의 응집체인 유사-단입자 형태인 리튬 복합전이금속 산화물을 포함하고, 상기 리튬 복합전이금속 산화물은 Ni, Co, Mn 및 Al을 포함하고, 리튬을 제외한 금속 원소 전체 몰수에 대한 Ni의 몰비가 0.83 이상 1미만이고, Mn 몰수에 대한 Co 몰수의 비가 0.5 이상 1 미만이며, Al 몰수에 대한 Co 몰수의 비가 5 내지 15인 양극 활물질에 관한 것이다.