Method of treating lithium manganese oxide spinel
November 26, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRechargeable organic electrolyte cell Method for preparation of LiMn2 O4 intercalation compounds and use thereof in secondary lithium batteries Method of preparing LI1+XMN204 for use as secondary battery electrode Nonaqueous electrolyte secondary cell Method for synthesis of high capacity Lix Mn2 O4 secondary battery electrode compounds Method for increasing the reversible capacity of lithium transition metal oxide cathodes Lithium manganese oxide compound and method of preparation Patent #: 5597664 InventorAssigneeApplicationNo. 757055 filed on 11/26/1996US Classes:429/137, Coating on electrode423/599, Manganese (e.g., manganate, etc.)427/126.1, Metallic compound coating429/224Manganese component is active materialExaminersPrimary: Kalafut, StephenAttorney, Agent or FirmForeign Patent References
International ClassH01M 004/50AbstractA method of treating lithium manganese oxide of spinel structure is disclosed. The method involves heating the lithium manganese oxide spinel in an atmosphere of an inert gas, e.g, argon, helium, nitrogen or carbon dioxide, which does not react with the spinel. Alternatively, the spinel may be first coated with an alkali metal hydroxide, preferably lithium, sodium or potassium hydroxide and then heated in an atmosphere preferably containing carbon dioxide. Such treatment of lithium manganese oxide spinel improves the performance of the spinel when employed as an electrode in rechargeable cells such as lithium-ion cells. Alternatively, the spinel may be first treated in an aqueous solution of a soluble metal salt of a carboxylic acid prior to treatment with heated carbon dioxide or inert gas. In such latter case the spinel may optionally also be treated with an alkali metal hydroxide prior to treatment with carbon dioxide or inert gas.Other References
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