CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: KIM, Jeong Han, SONG, Jung Hoon, MIN, Sung Hwan
• Format: Patent
• Language: English; French; Korean
• Published: 04.07.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a cathode active material for a lithium secondary battery, a method for manufacturing the same, and a lithium secondary battery comprising the same. The cathode active material for a lithium secondary battery comprises a core and a coating layer, wherein the core is a lithium metal oxide, the coating layer contains boron, and a boron compound in the coating layer contains a lithium boron oxide and a boron oxide, wherein the lithium boron oxide is at least 70 wt% and and not more than 99 wt% in the entire coating layer, the lithium boron oxide contains Li2B4O7, and the content of Li2B4O7 is 55-99 wt% with respect 100 wt% of the lithium boron oxide. La présente invention concerne une matière active de cathode pour une batterie secondaire au lithium, un procédé de fabrication associé et une batterie secondaire au lithium la comprenant. La matière active de cathode pour une batterie secondaire au lithium comprend un cœur et une couche de revêtement, le cœur étant un oxyde métallique de lithium, la couche de revêtement contenant du bore, et un composé à base de bore dans la couche de revêtement contenant un oxyde de lithium et de bore et un oxyde de bore, l'oxyde de lithium-bore étant présent à hauteur d'au moins 70 % en poids et d'au plus 99 % en poids dans toute la couche de revêtement, l'oxyde de lithium-bore contenant du Li2B4O7, et la teneur en Li2B4O7 étant de 55 à 99 % en poids par rapport à 100 % en poids de l'oxyde de lithium et de bore. 리튬 이차 전지용 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지에 대한 것으로, 코어 및 코팅층으로 구성되고, 상기 코어는 리튬 금속 산화물이고, 상기 코팅층은 보론을 포함하고, 상기 코팅층 내 보론 화합물은, 리튬 보론 산화물 및 보론 산화물을 포함하고, 상기 리튬 보론 산화물은, 전체 코팅층 내 70중량% 이상 및 99중량%이고, 상기 리튬 보론 산화물은, Li2B4O7를 포함하고, 상기 리륨 보론 산화물 100중량%에 대해, Li2B4O7의 함량은 55중량% 이상 및 99중량% 이하인 것인 리튬 이차 전지용 양극 활물질을 제공한다.