Process for preparing Li.sub.x Mn.sub.2 O.sub.4 intercalation co

Details Process for preparing Li.sub.x Mn.sub.2 O.sub.4 intercalation co Process for preparing Li.sub.x Mn.sub.2 O.sub.4 intercalation co

1998-06-26

1999-08-17

Straub, Gary P.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423605, 429224, C01G 4512, C01G 4502, H01M 450

Patent

active

059390433

ABSTRACT:
A method of forming lithium manganese oxide spinel, comprising the steps of combining predetermined amounts of lithium carbonate powder and manganese dioxide powder, the powders having predetermined surface areas; mixing the lithium carbonate and manganese dioxide for about 0.5 hours to about 2.0 hours in a manner so as to thoroughly mix the powders, but not to significantly increase the surface area of the powders; increasing the temperature of the mixture from approximately room temperature to a calcining temperature between about 700.degree. C. to about 900.degree. C.; maintaining the calcining temperature of the mixture between about 700.degree. C. to about 900.degree. C. for about 7 hours to about 13 hours; reducing the temperature of the mixture from the calcining temperature to about 500.degree. C. at a cooling rate between about 10.degree. C./hour to about 120.degree. C./hour; and cooling the mixture from 500.degree. C. to room temperature.

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