Method for preparing an active substance of chemical cells

Details Method for preparing an active substance of chemical cells Method for preparing an active substance of chemical cells

1996-06-03

1998-04-21

Bell, Bruce F.

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Compositions containing a single chemical reactant or plural...

423594, 423595, 423596, 423599, 423604, 423605, 423632, 423642, 252518, 429218, 429220, 429224, H01M 488

Patent

active

057420700

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.

REFERENCES:
patent: 5168095 (1992-12-01), Munakata et al.
patent: 5378560 (1995-01-01), Tomiyama
patent: 5565688 (1996-10-01), Hayashi
Translation of JP 2-9722. (Jan., 1990).
Partial translation of JP 2-74505. (Mar., 1990).
Thackeray et al: "Lithium Insertion into Manganese Spinels", Material Research Bulletin, vol. 18, pp. 461-472, 1983 no month available.

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