Patent ID: 6395250
Filing Date: 2002-05-28
Classification: C01G,C01P,H01M,Y02E

Abstract:
In a process for preparing a complex oxide represented by the general formula (I)LiyNi1âˆ’xCox1Mx2O2â€ƒâ€ƒ(I) (wherein M represents at least one element selected from the group consisting of Al, Fe and Mn, x represents 01 represents 01<0.5, x1+x2=x, x2 represents 02<0.5 and y represents 0.9&lE;y&lE;1.3),the process characterized by adding to a basic metal salt having the general formula (II) Ni1âˆ’xCox1Mx2(OH)2(1âˆ’x+x1)+3x2âˆ’nz(Anâˆ’)z.mH2Oâ€ƒâ€ƒ(II) â€ƒ[wherein M represents at least one element selected from the group consisting of Al, Fe and Mn, x represents 01 represents 01<0.5, x2 represent 02<0.3, x1+x2=x, Anâˆ’ represents an anion having a valence of n (n=1Ëœ3), z and m are positive numbers satisfying respectively the ranges of 0.03&lE;z&lE;0.3, 0&lE;m<2] an amount of a lithium compound corresponding to the number of atomic moles of Li indicated by y in an aqueous medium to form a slurry, spray or freeze drying the formed slurry, subjecting the resultant dried material to press molding, and heating the press molded product at a temperature about 600Â° C.Ëœ900Â° C. for about 4 hours or more in an oxidative atmosphere.