POSITIVE ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

• Main Authors: OH EUNOK, KANG MINKYEONG, KWON SEONYOUNG, OH YUNTAEK, SON JUNGWOO, KWAK TAEHEE
• Format: Patent
• Language: English; Korean
• Published: 25.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

집전체, 및 상기 집전체 상에 위치하는 양극 활물질 층을 포함하는 리튬 이차 전지용 양극으로서, 상기 양극 활물질 층은 양극 활물질을 포함하고, 상기 양극 활물질은 리튬과 산소를 제외한 금속 전체에 대한 니켈의 함량이 70 몰% 이상인 리튬 니켈계 복합 산화물을 함유하고 단입자 형태인 제1 양극 활물질 75 중량% 내지 100 중량%, 및 리튬 니켈계 복합 산화물을 함유하고 복수의 1차 입자들이 응집된 2차 입자 형태의 제2 양극 활물질 0 중량% 내지 25 중량%를 포함하며, 상기 양극에 대한 엑스선 회절 분석에서 (104)면의 피크 강도에 대한 (003)면의 피크 강도의 비율이 4.8 이상인 리튬 이차 전지용 양극, 그리고 이를 포함하는 리튬 이차 전지에 관한 것이다. Disclosed are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery comprising the same, the positive electrode for the rechargeable lithium battery comprising a current collector and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer comprises a positive electrode active material, the positive electrode active material comprises about 75 wt% to about 100 wt% of a first positive electrode active material in a form of a single particle and comprising a lithium nickel-based composite oxide having a nickel content of greater than or equal to about 70 mol% relative to the total metal excluding lithium, and about 0 wt% to about 25 wt% of a second positive electrode active material in a form of a secondary particle in which a plurality of primary particles are aggregated and comprising a lithium nickel-based composite oxide, and in an X-ray diffraction analysis of the positive electrode, and a ratio of a peak intensity of the (003) plane to a peak intensity of the (104) plane is greater than or equal to about 4.8.