Process for producing lithium manganese oxide suitable for use as cathode material of lithium ion secondary batteries
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United States of America Patent
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Nov 16, 1999
Grant Date -
N/A
app pub date -
Oct 28, 1997
filing date -
Oct 29, 1996
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Expired
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Abstract
A process for producing a lithium manganese oxide which has a formula of Li.sub.x MnO.sub.2 in which x is between 0.1 and 1 and which is suitable for use as a 3 volt cathode material, which comprises mixing at least one lithium compound with at least one manganese compound at a Li/Mn atomic ratio of 0.1-1 in a solvent selected from an aliphatic lower alcohol having from 1 to 3 carbon atoms, water and a mixture of the alcohol and water, allowing the resultant mixture to form a gel-like mixture, drying the gel-like mixture as required, and calcining the resulting product in an oxidative atmosphere at a temperature of 200-350.degree. C.
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