Doped lithium titanium spinel compound and electrode containing the same

摘要

The present invention relates to a compound of formula I: Li4-yK'yTi5-zK "zO12-xAx (I) wherein A is one or more anions selected from the group consisting of I, N, Br, Cl, F And K and K ″ are one or more cations selected from the group consisting of Na, K, Cd, Se, Te, S, Sb, As, P, Pb, Bi, Hg, Si, and C, respectively. 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.