Patent ID: 6325988
Filing Date: 2001-12-04
Classification: C01G,C01P,H01M,Y02E

Abstract:
A process for preparing a spinel lithium manganese complex oxide represented by the general formula (Ia)Li.sub.x Mn.sub.2-y Al.sub.y O.sub.4 (Ia)(wherein 0.9<x<1.1, and 0.002<y<0.5), said process comprising the steps of:reacting a manganese complex hydroxide represented by the general formula (IIa)Mn.sup.2+.sub.(1-a) Al.sup.3+.sub.a (OH).sub.[2+a-nz] (A.sup.n-).sub.2.multidot.mH.sub.2 O (IIa)(wherein A.sup.n- is an anion having a valence n, 0.001.ltoreq.a.ltoreq.0.25, 0.03<z<0.3 and 0<m) with a water-soluble lithium compound in a molar ratio of Li/(Mn+Al) of 0.45.about.0.55 in an aqueous medium to obtain a slurry,spray- or freeze-drying the obtained slurry, andheating the resultant dry material at a temperature of 600.about.900.degree. C.