Boron doped silicon oxide based anode active material and Method of preparing for the same and Lithium secondary battery using the same

摘要

The present invention relates to a boron-doped silicon oxide based anode active material, a method of manufacturing the same, and a lithium secondary battery using the same. More particularly, the present invention relates to a method of manufacturing a lithium- One); And a step (2) of disposing the dummy substrate and the silicon oxide-based mixture prepared in step 1 apart from each other and performing a heat treatment (step 2). When the boron-doped silicon oxide-based material prepared by the present invention is used as a negative electrode active material for a secondary battery, the cost of the negative electrode active material is increased compared to the existing technology, and the boron compound, which is an impurity, Only the element is doped. Further, by allowing the boron element to diffuse into the silicon oxide-based material, the electrochemical characteristics can be improved due to an increase in diffusion rate of lithium ions and partial silicon crystal formation. Further, the capacity and cycle characteristics of the battery are improved, which can be utilized as a secondary battery for electric vehicles and large energy storage devices in the future.