Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1999-04-02
2000-07-04
Griffin, Steven P.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423599, C01D 102, C01G 3102, C01G 4502
Patent
active
060834757
ABSTRACT:
The present invention is a simple and reliable method for producing lithiated metal oxides such as those useful as cathode materials in lithium ion electrochemical cells. The method is based on the use of an organic solvent that dissolves both lithium sulfide and elemental sulfur without dissolving the metal oxide or the lithiated product. Lithium sulfide and the metal oxide as a powder are refluxed in the organic solvent under an inert atmosphere. The organic solvent dissolves the lithium sulfide and the dissolved sulfide reduces the metal oxide allowing the intercalation of lithium. At the same time the sulfur that results from the oxidation-reduction reaction is carried away by the solvent thereby promoting the reaction and preventing contamination of the product with sulfur.
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Chaloner-Gill Benjamin
Shackle Dale R.
Griffin Steven P.
Ildebrando Christina
Rentech Inc.
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