| abstract |
The present invention contains silicon (Si), nickel (Ni), and titanium (Ti) elements, and includes a silicon single phase; And an alloy phase composed of at least two elements of silicon, nickel, and titanium, the anode active material comprising: a single structure and an alloy phase having a microstructure uniformly distributed in a grain size of 5 to 50 nm. Provided is a negative active material for a secondary battery, a negative electrode including the negative electrode active material, and a lithium secondary battery including the negative electrode.n n n When a negative electrode active material having a nano-sized uniform microstructure according to the present invention is used in a lithium secondary battery, it has a high capacity and a small change in volume of the negative electrode active material due to charge and discharge, and improves life characteristics according to a charge and discharge cycle. A lithium secondary battery can be manufactured. |