Anode for lithium secondary battery and lithium secondary battery including the same

An anode for a lithium secondary battery, comprising:

• an anode current collector;
• and
• a first anode active material layer and a second anode active material layer sequentially stacked on at least one surface of the anode current collector, the first anode active material layer and the second anode active material layer comprising a first silicon-based active material and a second silicon-based active material, respectively,
• wherein Formulae 1 to 3 are satisfied:
• 30<R1<50 [Formula 1]
• 50<R2<70 [Formula 2]
• 2.0≤(S2R2/S1R1)≤8.0 [Formula 3]
• wherein, in Formulae 1 to 3, R1 is a numerical percentage value of a thickness of the first anode active material layer relative to a total thickness of the first anode active material layer and the second anode active material layer,
• R2 is a numerical percentage value of a thickness of the second anode active material layer relative to the total thickness of the first anode active material layer and the second anode active material layer,
• S1 is a weight percent value of the first silicon-based active material based on a total weight of the first negative active material layer, and
• S2 is a weight percent value of the second silicon-based active material based on a total weight of the second negative active material layer.