Patent ID: 6623886
Filing Date: 2003-09-23
Classification: H01M,Y02E

Abstract:
A positive electrode-active material comprising a composite oxide having the general formula Lix M1y M2z M3u M4w On, where 01, M2, M3 and M4 are different and are selected from the group consisting of Ba, Mg, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, Al, B, Si, Ga, Ge, N, P, As, Zr, Hf, Mo, W, Re, Ru, Rh, Pt, Ag, Os, Ir, Au, Sn, and lanthanides, where one of M1, M2, M3 and M4 is present in an amount of at least about 70 mol percent of the combined M1, M2, M3 and M4, and which can be charged at over 4.2 volts for a period of at least 3 hours when present in a positive electrode in an electrochemical cell.