CATHODE ACTIVE MATERIAL, LITHIUM ION SECONDARY BATTERY AND RECHARGABLE BATTERY HAVING THE SAME

摘要

A composite lithium compound having a mixed crystalline structure, the mixed crystal has a first crystalline substance having one or more members with following general formulas LixM'y(XO4)z, LiM' XO5, LiM'XO6, and LiM'X2O7, in which M' is an element selected from a group consisting of Na, Mn, Fe, Co, Ni, Ti, V, Y, Mg, Ca, Nb and Zn; the X is an element selected from a group consisting of P, S, As, Mo and W; and a second crystalline substance having one or more members with a general formula of AaMbNcOd. Further, a lithium ion secondary battery and a rechargeable battery with a cathode comprising the same are provided.