Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1996-10-23
1998-10-20
Bos, Steven
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
429224, C01G 4512
Patent
active
058242856
ABSTRACT:
In a preferred method, a lithium compound is reacted with a manganese compound in the presence of gaseous ammonia produced by the decomposition of an ammonium compound. In the preferred method, the decomposition of the ammonium compound is initiated before the reaction occurs to form the lithium manganese oxide product spinel. It is also possible to have the decomposition initiated at about the same time as the reaction. It is possible to have the decomposition continue while the reaction to form the spinel occurs. The reaction to form the spinel occurs at an elevated temperature to provide a product of the desired nominal general formula, having a quantity of lithium corresponding to more than 1 atomic units of lithium for every 2 atomic units of manganese. This lithium-rich product, having greater than a 1:1 ratio of Mn.sup.+3 to Mn.sup.+4 is made possible by the presence of the ammonia decomposition gas. It is preferred that the lithium compound, the manganese compound, and the ammonium compound each be in particle form and intermingled in a desired proportion prior to heating.
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Bos Steven
Deschere Linda
Valence Technology Inc.
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