Electrode including electrode active material having through-holes, lithium battery containing the same, and method of preparing the same

A method of preparing an electrode, the method comprising:

• preparing a mixture by dry mixing a dry electrode active material, a dry conductive material, and a dry binder;
• providing an electrode current collector;
• preparing the electrode comprising an electrode active material layer and a binder on one side or opposite sides of the electrode current collector, by placing and rolling the mixture on the one side or the opposite sides of the electrode current collector;
• and
• introducing a plurality of through-holes into the electrode active material layer,
• wherein the introduction of the plurality of through-holes is carried out at the same time as the rolling, or subsequent to the rolling;
• wherein the electrode current collector is at a portion of the electrode active material layer on one side of the electrode active material layer or at a portion of the electrode active material layer between opposing sides of the electrode active material layer;
• wherein the electrode has:
• a first domain comprising the portion of the electrode active material layer and the electrode current collector;
• and
• a second domain comprising a remaining portion of the electrode active material layer and being free of the electrode current collector, and
• wherein the plurality of through-holes is in the second domain and the first domain is free of any through-hole of the plurality of through-holes.