Anode for secondary battery, method for preparing the same, and secondary battery comprising anode

A method for preparing an anode, comprising the steps of:

• (A) forming an anode mixture layer by coating an anode mixture slurry including the anode active material mixture on at least one surface of an anode current collector;
• and
• (B) applying a magnetic field to the anode mixture layer to change an orientation of a pore between the anode active materials,
• wherein the anode active material mixture comprises a carbon-based anode active material and a silicon (Si)-based anode active material,
• wherein the Si-based anode active material comprises at least one of Si, a Si-C composite, and SiOx (0<x<2),
• wherein the magnetic field has a first line of magnetic force in a direction from the lower surface toward d ver surface of the anode current collector and the second line of magnetic force in a direct ion the upper so face toward the lower surface of the anode current collector that are periodically after lately formed,
• wherein the magnetic force strength of the first line magnetic force increases and ther decrease s to change o the second. of magnetic ford e, and the magnetic force strength of the second line of magnetic force increase and decreases,
• wherein a z-tensor value of the pore in the anode mixture layer, obtained by evaluating an orientation tensor in each axial direction, after three-dimensionally imaging the pores inside the anode mixture layer formed by applying a magnetic field thereto using an X-ray microscope, is 0.25 or more.