Patent ID: 6242134
Filing Date: 2001-06-05
Classification: C01G,C01P,H01M,Y02E

Abstract:
A method for producing a positive active material for a non-aqueous electrolyte secondary battery, said method comprising the steps of:a) precipitating a hydroxide represented by a chemical formula Ni.sub.a M.sub.b (OH).sub.2 (0.7.ltoreq.a.ltoreq.0.95, a+b=1) by combining a solution of a nickel salt, and a salt of the element M (M being at least one element selected from the group consisting of Co, Mn, Cr, Fe, and Mg),b) thermally decomposing said hydroxide to form a mixture of a nickel oxide having an element M dissolved in a solid solution, and represented by a chemical formula Ni.sub.v M.sub.w O (0.7.ltoreq.v.ltoreq.0.95, v+w=1); andc) firing said mixture in an oxidizing atmosphere with one of lithium hydroxide and a lithium hydroxide hydrate, to produce a lithium-containing complex oxide represented by a chemical formula Li.sub.x Ni.sub.y M.sub.z O.sub.2 (0.90.ltoreq..times..ltoreq.1.10, 0.7.ltoreq.y.ltoreq.0.95, y+z=1).