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US 5,211,933 AGranted
Method for preparation of LiCoO.sub.2 intercalation compound for use in secondary lithium batteries
AssigneeBell Communications Research, Inc.
InventorsPhilippe Barboux, Frough K. Shokoohi, Jean-Marie Tarascon
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Abstract
Methods are described for the low temperature preparation of the spinel LiMn.sub.2 O.sub.4 and layered LiCoO.sub.2 phases which are intercalable compounds of interest for use in lithium secondary batteries. These phases can be prepared in bulk or thick film form at temperatures less than 400.degree. C. using acetate precursors.
Claims4
A method of preparing a lithiated cobalt oxide intercalation compound comprising the steps of:
- a) mixing in stoichiometric amounts, based on said lithiated cobalt oxide compound, aqueous solutions of lithium hydroxide and cobalt acetate and a sufficient amount of an aqueous solution of a base selected from the group consisting of organic bases and ammonium hydroxide to establish a solution mixture pH of about 7, thereby initiating the formation of a gelatinous precipitate;
- b) drying said precipitate by heating in the range of 60.degree.-150.degree. C., thereby forming a xerogel;
- and
- c) annealing said xerogel by heating in the range of 200.degree.-600.degree. C.
1 more element
Dependencies are inferred from the claim text.