| abstract |
Collector for negative electrode; And a cathode active material layer disposed on at least one surface of the cathode current collector, wherein the active material layer is disposed on at least one surface of the current collector for a negative electrode, and a lower active material layer disposed on the upper surface of the lower active material layer Wherein the upper active material layer comprises an upper active material, an upper binder, and an upper thickener, and the lower active material layer includes a lower active material, a lower binder, and a lower thickener, (Rt) of the powder resistivity (Rb) of the lower active material to the lower active material is 0.98 or more, (i) the weight (Wt) of the upper conductive material further included in the upper active material layer is further included in the lower active material layer (Wb) of the lower conductive material satisfies a condition that Wb / Wt > = 1.1, or ii) a lower conductive material is contained only in the lower active material layer, and the powder resistivity (Rt) (Rb / Rt) of the powder resistivity (Rb) of the non-under active material is less than 0.98, i) the weight (Wt) of the upper conductive material further included in the upper active material layer, The weight of the conductive material satisfies the condition of Wb / Wt < / = 0.9, or ii) only the upper active material layer includes the upper conductive material, a method for producing the same, and a lithium secondary battery comprising the same. |