Anode Active Material, Method For Preparing Anode Active Material, Anode Composition, Lithium Secondary Battery Anode Comprising Same, And Lithium Secondary Battery Comprising Anode

Abstract: Provided is anode active material comprising a silicon-based active material, wherein the silicon-based active material includes silicon-based grains, the high-angle grain boundary in the silicon-based grains is 30% or higher, and the silicon-based active material satisfies the following formulas 1 and 2: [Formula 1] 1µm = the particle size (D50) of a silicon-based active material = 10µm [Formula 2] 2nm = the grain size of a silicon-based active material = 1µm.

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