Cathode for lithium secondary battery and lithium secondary battery comprising the same

• Main Authors: Choi, Jung-Seok, Kim, Hye-Bin, Oh, Song-Taek
• Format: Patent
• Language: English
• Published: 26.04.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Disclosed is a positive electrode for a lithium secondary battery, which includes: a positive electrode current collector; and a positive electrode active material layer including an upper layer portion and a lower layer portion, wherein each of the upper layer portion and the lower layer portion of the positive electrode active material layer includes a positive electrode active material, binder polymer and a conductive material, and the positive electrode active material has an electroconductivity of 0.0001-0.0004 S/cm, and the content of the conductive material contained in the lower layer portion is 10-59 parts by weight based on 100 parts by weight of the content of the conductive material contained in the upper layer portion, or the positive electrode active material has an electroconductivity of 0.008-0.015 S/cm, and the content of the conductive material contained in the lower layer portion is 10-30 parts by weight based on 100 parts by weight of the content of the conductive material contained in the upper layer portion.