POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: JEONG, Bong Jun, CHOI, Su An, AN, Ji Sun, JEON, Sang Hoon
• Format: Patent
• Language: English; French; Korean
• Published: 08.09.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is a positive electrode active material for a lithium secondary battery, the positive electrode active material comprising: a core comprising a compound represented by chemical formula 1; and a coating layer positioned on the surface of the core. Chemical formula 1: Li [LizA(1-z-a)Da]Eb02-b (In chemical formula 1, A is NiαCo β MnƔ; D is at least one element selected from the group consisting of Mg, Al, B, Zr, Mo, Nb and Ti; E is at least one element selected from the group consisting of P, F and S; -0.05 ≤ z ≤ 0.1; 0 ≤ a ≤ 0.05; 0 ≤ b ≤ 0.05; 0.3 ≤ α ≤ 0.9; 0.05≤ β ≤0.4; and 0.05≤ Ɣ ≤0.4.) L'invention concerne un matériau actif d'électrode positive pour une batterie secondaire au lithium, le matériau actif d'électrode positive comprenant : un noyau comprenant un composé représenté par la formule chimique (1); et une couche de revêtement positionnée sur la surface du noyau. La formule chimique 1 : Li [LizA(1-z-a)Da]Eb02-b (dans la formule chimique 1, A est NiαCo β MnƔ; D est au moins un élément choisi dans le groupe consistant en Mg, Al, B, Zr, Mo, Nb et Ti; E est au moins un élément choisi dans le groupe consistant en P, F et S; -0,05 ≤ z ≤ 0,1; 0 ≤ a ≤ 0,05; 0 ≤ b ≤ 0,05; 0,3 ≤ α ≤ 0,9; 0,05 ≤ β ≤ 0,4; et 0,05 ≤ Ɣ ≤ 0,4). 하기 화학식 1로 표시되는 화합물을 포함하는 코어; 및 코어의 표면에 위치한 코팅층을 포함하는 리튬 이차 전지용 양극 활물질을 제공한다. [화학식 1] Li [LizA(1-z-a)Da]Eb02-b (상기 화학식 1에서 A는 NiαCo β MnƔ이고, D는 Mg, Al, B, Zr, Mo, Nb 및 Ti로 이루어진 군에서 선택된 1종 이상의 원소이고, E는 P, F 및 S로 이루어진 군에서 선택된 1종 이상의 원소이고, -0.05 ≤ z ≤ 0.1, 0 ≤ a ≤ 0.05, 0 ≤ b ≤ 0.05, 0.3 ≤ α ≤ 0.9, 0.05≤ β ≤0.4 및 0.05≤ Ɣ ≤0.4 이다.)