Patent ID: 7713313
Filing Date: 2010-05-11
Classification: C01G,C01P,H01M,Y02E,Y10T

Abstract:
1. A process of producing electrode material for the cathode of a lithium battery having the general formula: Wherein 1≦x≦1.33 and 3−x≦y≦3.1−x and Wherein M is an element selected from the group consisting of Mg, Al, Cr and Ni and 1≦x1.33, 3−x−z≦y≦3.1−x−y and 0<z≦1.0 which comprises the steps of preparing the material of formula (I) by the steps of: a) mixing stoichiometric amounts of lithium hydroxide monohydrate and a manganese oxide in the presence of water; b) heating the mixture of step a) at a temperature of about 100 to 180° C. to drive off water to obtain LiMn c) heating the product of step b) to about 650° C. to 900° C. for about 2 to 10 hours, to reduce manganese to Mn+3, and then d) grinding the product of step c) to less than 100 microns in size, and including in step a) the addition of M oxide wherein M is as herein before described to produce a lithium manganate of formula (II).