Silicon Compound Based Negative Active Material, Manufacturing Method thereof And Lithium Secondary Battery Comprising The Same

The present invention relates to a method for producing an electrode of silicon based negative electrode active material, which is highly favored as a negative electrode active material for a large lithium secondary battery, more particularly, to a lithium secondary battery containing Si-C nanocomposite negative electrode active material, which is silicon based composite, representing excellent cell characteristics by overcoming the initial irreversible capacity. The initial irreversible capacity is overcome by producing nanocomposite of silicon based negative electrode active material in nanoscale using an electricity explosion method; controlling the type and content of silicon based metal ion materials; developing by applying a PAA high-strength binder; and adding lithium metal on the surface of an electrode of negative electrode active material. The method of the present invention is a simple method, and enables the production of silicon Si-C nanocomposite negative electrode active material of quantitative initial Ah efficiency. The lithium secondary battery in which Si-C nanocomposite negative electrode active material is applied provides high output, high energy and long life span characteristics in addition to facilitate mass production and have economical characteristics.