Patent ID: 6159637
Filing Date: 2000-12-12
Classification: C01G,C01P,H01M,Y02E

Abstract:
A positive electrode material for a lithium secondary cell, which contains a spinel-type lithium manganese oxide having a crystal structure belonging to Fd3m (No.227), wherein the lithium manganese oxide satisfies the following formula:Li(Mn.sub.2-x-y Li.sub.x M.sub.y)O.sub.4-.delta.- A.sub.zwherein M is at least one metal element substitutable at Mn (16d) sites, other than Mn and Li, A is a halogen atom, x is from 0.01 to 0.10, y is a positive number, z is from 0 to 0.2, and 3 represents a quantity of oxygen deficiency, and the average valency a of Mn is from 3.501 to 3.635.