ANODE ACTIVE MATERIAL, ANODE FOR SECONDARY BATTERY COMPRISING THE SAME, AND SECONDARY BATTERY COMPRISING THE SAME

An anode active material according to an example of the present disclosure comprises: a first active material comprising a silicon-based material; and a second active material comprising a carbon-based material, in which the second active material comprises at least one of the first carbon-based material and the second carbon-based material, and a full length expansion rate or a full width expansion rate of an anode comprising the anode active material satisfies the following Expression 3: [Expression 3] a1=k1*x/y, a2=k2*x/y, wherein a1 denotes the full length expansion rate, a2 denotes the full width expansion rate, k1 and k2 denote real numbers, and x denotes a weight of the first carbon-based material, and y denotes a weight of the second carbon-based material.