Conductive agent-positive active material composite for lithium secondary battery, method of preparing the same, and positive electrode and lithium secondary battery comprising the same

摘要

The present invention relates to a conductive agent/positive active material composite for a lithium secondary battery. The composite includes a positive active material capable of reversibly intercalating/deintercalating lithium ions, and a conductive agent on the surface of the positive active material. The conductive agent comprises a first conductive agent having a specific surface area ranging from about 200 to about 1500 m2/g and a second conductive agent having a specific surface area of about 100 m2/g or less.