Insertion compounds based on manganese oxide usable as the positive electrode active material in a lithium battery
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United States of America Patent
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Dec 23, 1997
Grant Date -
N/A
app pub date -
Jun 19, 1995
filing date -
Jun 21, 1994
priority date (Note) -
Expired
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Abstract
The invention relates to the preparation of insertion compounds based on manganese oxide, usable as the positive electrode active material in a lithium battery. These compounds in the hatched area of FIG. 1 can be prepared by reacting in the solid state a manganese oxide powder MnO.sub.2 -.beta., having a specific surface below 7 m.sup.2 /g and an average grain size below 10 .mu.m, with a powder of a lithium compound such as Li.sub.2 CO.sub.3 or LiOH, at a temperature of 150.degree. to 500.degree. C. for an adequate time to convert the .beta.-MnO.sub.2 into manganese and lithium oxide having a lacunary or stoichiometric spinel structure.
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