A NEGATIVE ELECTRODE AND A LITHIUM SECONDARY BATTERY COMPRISING THE SAME

• Main Authors: BYUN JIN SEOK, CHAE BYUNG JOON, KIM KWANG HYUN, RYU HO HYEON
• Format: Patent
• Language: English; Korean
• Published: 16.05.2023
• 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 cathode. According to an embodiment of the present invention, the cathode comprises: a cathode current collector; and a cathode active material layer. When the cathode active material layer is peeled from the cathode current collector at a speed of 5 mm/sec, following equation 1 is satisfied. Equation 1 is 10 <= (average reflective rate of a surface of the cathode current collector from which the cathode active material layer has been peeled / average reflective rate of the cathode current collector) x 100 <= 55. 본 발명은 음극에 관한 것으로, 본 발명의 일 실시예에 따른 음극은, 음극 집전체; 및 음극 활물질층을 포함하며, 5 mm/sec의 속도로 상기 음극 활물질층을 상기 음극 집전체로부터 박리하였을 때, 하기 식 1을 만족하는 것이다: [식 1] 10 ≤ (음극 활물질층이 박리된 음극 집전체 표면의 평균 반사율/ 음극 집전체의 평균 반사율) x 100 ≤ 55.