Patent ID: 6511647
Filing Date: 2003-01-28
Classification: C01G,C01P,H01M,Y02E

Abstract:
A method of making an oxide LiQxMn(1-x)O2, in which Q represents a transition metal and x is less than 0.5, with a layered monoclinic structure, the method comprising:(a) synthesizing NaQxMn(1-x)O2 with a layered structure similar to that of &agr;-NaFeO2 by reacting stoichiometric amounts of a sodium salt, a manganese (II) salt, and a salt of the metal Q in solution so as to form a precipitate, drying the precipitate in air, heating the dry precipitate to a temperature of between 650 and 720Â° C. in air, and then cooling the precipitate to room temperature in air; and (b) subjecting the NaQxMn(1-x)O2 to ion exchange with a lithium salt in solution in a non-alcoholic organic solvent at a temperature between about 140 and 210Â° C.