NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY METHOD OF PREPARING SAME AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

• Main Authors: SOH HYUN, LEE EUNJOO, PARK SUNIL, KIM NARAE, MOON JOONGHO, NAH JAEHOU
• Format: Patent
• Language: English; Korean
• Published: 13.09.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; 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 negative electrode active material for a rechargeable lithium battery, a manufacturing method thereof, and a rechargeable lithium battery including the same. The negative electrode active material for a rechargeable lithium battery comprises: secondary particles in which a plurality of natural graphite primary particles are assembled, wherein the secondary particles include voids; and amorphous carbon positioned in the voids. In a cross section of the negative electrode active material for a rechargeable lithium battery, the area of the amorphous carbon is 10% to 30% with respect to 100% of the total area of the negative electrode active material. 리튬 이차 전지용 음극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지에 관한 것으로서, 상기 리튬 이차 전지용 음극 활물질은 복수의 천연 흑연 1차 입자들이 조립되고, 공극을 포함하는 2차 입자 및 상기 공극 내에 위치하는 비정질 탄소를 포함하는 리튬 이차 전지용 음극 활물질로서, 상기 리튬 이차 전지용 음극 활물질의 단면에 있어서, 상기 비정질 탄소의 면적은 상기 음극 활물질 전체 면적 100%에 대하여 10% 내지 30%인 음극 활물질이다.