▎ 摘　　要

NOVELTY - Cathode composition comprises: a cathode active material that comprises first cathode active material particles respectively having a secondary particle shape and second cathode active material particles respectively having a single particle shape; and a conductive material including a linear-type conductive material. USE - The cathode composition is used in a lithium secondary battery which is used as a power source of a mobile electronic device such as a camcorder, a mobile phone, and a laptop computer. ADVANTAGE - The cathode composition provides lithium secondary battery which is improved with respect to capacity and/or energy density, preferably within a limited unit volume, and/or life-span stability, preferably at high temperatures, and/or storage stability and/or mechanical stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a lithium secondary battery, comprising: a cathode comprising a cathode current collector and a cathode active material layer formed by coating the cathode composition for a lithium secondary battery on at least one surface of the cathode current collector; and an anode facing the cathode.