Method for preparing an active substance of chemical cells
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United States of America Patent
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Apr 21, 1998
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N/A
app pub date -
Jun 3, 1996
filing date -
Sep 22, 1993
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Abstract
A method for preparing an active substance for use in a positive electrode in chemical cells comprising a negative electrode is described. The method comprises preparing a mixed aqueous solution of a water-soluble lithium compound, a water-soluble transition metal compound, and an organic acid selected from the group consisting of organic acids having, in the molecule, at least one carboxyl group and at least one hydroxyl group and organic acids having at least two carboxyl groups, preparing an organic acid complex comprising lithium and a transition metal, and thermally decomposing the complex at temperatures sufficient for the decomposition to obtain the active substance. The complex may be prepared by dehydrating the solution. Alternatively, the complex may be formed by spraying the solution under heating conditions.
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