ANODE AND SECONDARY BATTERY COMPRISING THE SAME

• Main Authors: LEE YONG SEOK, JANG HYUN JOONG, KIM JAE RAM
• Format: Patent
• Language: English; Korean
• Published: 30.08.2023
• 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 and a secondary battery including the negative electrode. Provided is a negative electrode for a secondary battery, including: a first negative electrode mixture layer positioned on a negative electrode current collector; and a second negative electrode mixture layer positioned on the surface of the negative electrode, wherein the first and second negative electrode mixture layers include a graphite-based negative electrode active material of graphite secondary particles, at least the first negative electrode mixture layer includes a graphite-based negative electrode active material of graphite primary particles, and the content [A2] of the graphite primary particles contained in the second negative electrode mixture layer is greater than the content [A1] of the graphite primary particles contained in the first negative electrode mixture layer. 본 발명은 음극 및 상기 음극을 포함하는 이차전지에 관한 것으로서, 음극 집전체 상에 위치하는 제1 음극 합제층 및 음극의 표면에 위치하는 제2 음극 합제층을 포함하고, 제1 및 제2 음극 합제층은 흑연 2차 입자의 흑연계 음극 활물질을 포함하고, 적어도 제1 음극 합제층은 흑연 1차 입자의 흑연계 음극 활물질을 포함하며, 제2 음극 합제층 내에 포함된 흑연 1차 입자의 함량 [A2]이 제1 음극 합제층 내에 포함된 흑연 1차 입자의 함량 [A1]보다 큰, 이차전지용 음극을 제공한다.