Positive electrode for secondary battery and lithium secondary battery comprising same

The present invention relates to a positive electrode for a secondary battery, the positive electrode comprising: a positive electrode current collector; a first positive electrode mixture layer laminated on the positive electrode current collector and comprising a first positive electrode active material and a first conductive material; and a second positive electrode mixture layer laminated on the first positive electrode mixture layer and comprising a second positive electrode active material and a second conductive material, wherein the average particle diameter (D 50 ) of the second positive electrode active material is 5 to 80% of the average particle diameter (D 50 ) of the first positive electrode active material, and the ratio of the specific surface area of the second conductive material to the specific surface area of the second positive electrode active material is at most 9.