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US 5,334,334 AGranted
Method of preparing lithium battery electrode compositions
AssigneeValence Technology, Inc.
InventorRene Koksbang
Life of this patent
Estimating the term…
Abstract
Fine particles of vanadium oxide or compound thereof, respectively represented by the general formulas V.sub.2 O.sub.5 and LiV.sub.3 O.sub.8, are prepared by freeze-drying a wet mixture containing a precursor. Alternatively, such oxide or compound is prepared in fine particle form intimately mixed with fine particles of carbon, also by freeze-drying.
Claims25
A method of preparing a composition for an electrode, comprising:
- a) forming a mixture comprising at least one volatile constituent and an oxide of vanadium represented by the general formula V.sub.2 O.sub.5 ;
- and
- b) freeze-drying the mixture of step (a) by cooling the volatile constituent to a temperature below the freezing point of such constituent under subatmospheric pressure for a time sufficient to remove a major portion of such constituent.
A method of preparing a composition for an electrode, comprising:
- a) forming a wet mixture comprising at least one volatile constituent, fine particles of carbon and an oxide of vanadium represented by the general formula V.sub.2 O.sub.5 ;
- and
- b) freeze-drying the mixture of step (a) by cooling the volatile constituent to a temperature below the freezing point of the volatile constituent under sub-atmospheric pressure thereby providing the oxide of vanadium intermingled with the fine particles of carbon.
A method of preparing a composition for an electrode, comprising:
- a) forming a wet mixture comprising at least one volatile constituent, lithium hydroxide (LiOH) and an oxide of vanadium represented by the general formula V.sub.2 O.sub.5 and reacting the LiOH with the V.sub.2 O.sub.5 for a time and at a temperature sufficient to provide lithium-vanadium oxide of the general formula LiV.sub.3 O.sub.8 ;
- and
- b) freeze-drying the product of step (a) by cooling the volatile constituent to a temperature below the freezing point of the volatile constituent under sub-atmospheric pressure for a time sufficient to remove a major portion of such constituent.
Dependencies are inferred from the claim text.