POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

• Main Authors: LEE UI TAE, LIM SEOKJAE, PARK JEONGHYEON, HAN SEUL KI, JEONG IL ROK, LEE SU JIN, CHOI KWONYOUNG, KIM SEONG IN, KIM JEONG HAN, CHANG JOON HA
• Format: Patent
• Language: English; Korean
• Published: 09.07.2024
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CRYSTAL GROWTH; ELECTRICITY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

본 실시예들은, 리튬 이차 전지용 양극 활물질, 및 이를 포함하는 리튬 이차 전지에 관한 것이다. 일 실시예에 따른 리튬 이차 전지용 양극 활물질은, 단입자 형태이며 층상 구조를 포함하는 금속 산화물; 그리고 상기 금속 산화물 표면에 위치하며 층상 구조를 포함하는 코팅층;을 포함하고, 상기 코팅층에 포함되는 층상 구조의 면간 거리 평균 값은 0.45 내지 0.48nm일 수 있다. The present embodiments relate to a cathode active material for a rechargeable lithium battery, and a rechargeable lithium battery comprising same. The cathode active material for a rechargeable lithium battery, according to one embodiment, comprises: a metal oxide, which has a discrete particle form and has a layered structure; and a coating layer, which is positioned on the surface of the metal oxide and has a layered structure, wherein the average interplanar spacing of the layered structure included in the coating layer can be smaller than the average interplanar spacing of the layered structure included in the metal oxide.