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

• Main Authors: HUR, Hyuck, CHAE, Seul Ki, KWAK, Min, PARK, Sin Young, KIM, Dong Hwi, HAN, Gi Beom, PARK, Kang Joon, JUNG, Wang Mo
• Format: Patent
• Language: English; French; Korean
• Published: 17.08.2023
• 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

The present invention relates: to positive electrode active material powder which is represented by the following [Chemical formula 1], includes over-lithiated manganese-based oxide particles in the form of a single particle consisting of one nodule or a quasi-single particle that is a composite of 2 to 30 or less nodules, and has an average particle diameter of D50 of 2.5 μm or less; and to a positive electrode and a lithium secondary battery comprising the positive electrode active material powder. [Chemical formula 1] LiaNibCocMndMeO2: In chemical formula 1, 1<a, 0≤b≤0.5, 0≤c≤0.1, 0.5≤d<1.0, 0≤e≤0.2, and M is at least one selected from the group consisting of Al, B, Co, W, Mg, V, Ti, Zn, Ga, In, Ru, Nb, Sn, Sr, and Zr. La présente invention concerne : une poudre de matériau actif d'électrode positive qui est représentée par la [formule chimique 1] suivante, comprenant des particules d'oxyde à base de manganèse sur-lithiées sous la forme d'une particule unique consistant en un nodule ou une particule quasi unique qui est un composite de 2 à 30 nodules ou moins, et a un diamètre de particule moyen D50 de 2,5 µm ou moins; et une électrode positive et une batterie secondaire au lithium comprenant la poudre de matériau actif d'électrode positive. [Formule Chimique 1] LiaNibCocMndMeO2 : Dans la formule chimique 1, 1 < a, 0 ≤ b ≤ 0,5, 0 ≤ c ≤ 0,1, 0,5 ≤ d < 1,0, 0 ≤ e ≤ 0,2, et M est au moins un élément choisi dans le groupe constitué par Al, B, Co, W, Mg, V, Ti, Zn, Ga, In, Ru, Nb, Sn, Sr et Zr. 본 발명은 하기 [화학식 1]로 표시되고, 1개의 노듈로 이루어진 단입자 또는 2개 내지 30개 이하의 노듈들의 복합체인 유사-단입자 형태인 과리튬 망간계 산화물 입자를 포함하고, 평균 입경 D50이 2.5㎛ 이하인 양극 활물질 분말과, 상기 양극 활물질 분말을 포함하는 양극 및 리튬 이차 전지에 관한 것이다. [화학식 1] LiaNibCocMndMeO2 상기 화학식 1에서, 1 < a, 0≤b≤0.5, 0≤c≤0.1, 0.5≤d<1.0, 0≤e≤0.2이고, M은 Al, B, Co, W, Mg, V, Ti, Zn, Ga, In, Ru, Nb, Sn, Sr 및 Zr로 이루어진 군에서 선택된 적어도 하나 이상임.