abstract |
The battery active material according to the embodiment of the present invention includes a niobium composite oxide expressed by the chemical formula Li x M (1-y) Nb y Nb 2 O (7 +?) . Provided that M is at least one kind selected from the group consisting of Ti and Zr, and x, y and delta are numbers satisfying 0? X? 6, 0? Y? 1 and -1? . The pH of the battery active material is 7.4 to 12.5. |