POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY INCLUDING SAME

• Main Authors: JEONG, Ho Jun, SHIN, Jun Ho, JEONG, Bong Jun, YANG, Ji Woon, CHOI, Su An, JEONG, Jin Seong, JEON, Sang Hoon
• Format: Patent
• Language: English; French; Korean
• Published: 29.03.2018
• 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 for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery including the same. The present invention may provide a positive electrode active material for a lithium secondary battery comprising a compound capable of reversibly intercalating and deintercalating lithium; and a coating layer disposed on at least a portion of the surface of the compound, wherein the coating layer contains S and is a composite coating layer further containing lithium metal oxides, metal oxides, and/or combinations thereof, and at least one of the lithium metal oxides or metal oxides independently containing a metal, M. La présente invention concerne un matériau actif d'électrode positive pour batterie rechargeable au lithium, son procédé de préparation et une batterie rechargeable au lithium le comprenant. L'invention permet d'obtenir un matériau actif d'électrode positive pour une batterie rechargeable au lithium comprenant un composé capable d'intercaler et de désintercaler le lithium de manière réversible; et une couche de revêtement disposée sur au moins une partie de la surface du composé. Ladite couche de revêtement contient du S et c'est une couche de revêtement composite contenant en outre des oxydes métalliques de lithium, des oxydes métalliques, et/ou des combinaisons de ceux-ci, et au moins l'un des oxydes métalliques de lithium ou des oxydes métalliques contient indépendamment un métal, M. 리튬 이차 전지용 양극 활물질， 이의 제조방법 및 이를 포함하는 리튬 이차 전지에 관한 것으로，리튬의 가역적인 인터칼레이션 및 디인터칼레이션이 가능한 화합물; 및 상기 화합물의 표면의 적어도 일부에 위치하는 코팅층을 포함하고，상기 코팅층은 S을 포함하며, 상기 코팅층은 리튬 금속 산화물，금속 산화물，및 /또는 이들의 조합을 더 포함하는 복합 코팅층이고， 상기 리튬 금속 산화물 및 금속 산화물 중 적어도 어느 하나는 서로 독립적으로，금속 M을 포함하는 것인 리튬 이차 전지용 양극 활물질을 제공할 수 있다.