abstract |
The present invention relates to a negative electrode active material, a method for producing the same, and a secondary battery comprising the negative electrode active material, wherein the negative electrode active material of the present invention comprises at least one of the following formulas (1) to (3). Ti 1 - x M x Nb 2 O 7 (1), TiNb 2 - x M x O 7 (2), Ti 1-x Nb 2-y M x + y O 7 (3), wherein, Ti is titanium X is greater than 0 and less than 1, M is a transition metal, Nb is niobium, O is oxygen, and y is from 0 to 1. |