| abstract |
The present invention provides a compound of formula I: Li 4-y K ′ y Ti 5-z K ″ z O 12-x A x (I) wherein A is from the group consisting of I, N, Br, Cl, F. One or more selected anions, K and K ″ are each selected from the group consisting of Na, K, Cd, Se, Te, S, Sb, As, P, Pb, Bi, Hg, Si, and C. One or more selected cations, and 0 ≦ x, y, z ≦ 0.4.). Furthermore, this invention relates to the electrode provided with the layer of the said lithium titanium spinel, and the nonaqueous electrolyte secondary battery which has the said electrode. |