Cathode active material for lithium secondary cell and method for manufacturing the same
Patent 6986968 Issued on January 17, 2006. Estimated Expiration Date: 
December 20, 2022. 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.
December 20, 2022. 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 References 2301103 Manufacture of hydroxylated ferric sulphate compound Microbicides Lithium--containing sulfates, method of preparation and uses thereof Cathode materials for secondary (rechargeable) lithium batteries Patent #: 5910382 Inventors
ApplicationNo. 10323731 filed on 12/20/2002US Classes:429/221, Iron component is active material429/231.5, Vanadium (V), chromium (Cr), niobium (Nb), molybdenum (Mo), titanium (Ti), or tungsten (W) component is active material429/231.6, Alkaline earth metal or magnesium (Mg) component is active material429/231.95, The alkali metal is lithium429/223, Nickel component is active material429/229, Zinc component423/138, Iron group metal (Fe, Co, or Ni)423/306, Plural metal or metal and ammonium containing423/307, Hydrogen containing423/551, Alkali metal containing (Li, Na, K, Rb, or Cs)423/558Iron containingExaminersPrimary: Kalafut, StephenAttorney, Agent or FirmInternational ClassesH01M 4/58C01B 25/45 C01B 17/98 AbstractA cathode active material for a lithium secondary cell used in a cellular phone is disclosed. The cathode active material for the lithium secondary cell and the method the same having a high capacity and a long lifetime, different from LiCoO2 and LiMn2O4, Li(Ni, Co)O2, and V-system oxide that has been researched as the active material for substituting LiCoO2 are provided. The cathode active material for the lithium secondary cell in the next formula 1 is obtained by heating or chemically treating diadochite [Fe2(PO4)(SO4)(OH).6H2O] that is the mineral containing PO43−, SO42−, and OH−.LiaFebMc(PO4)x(SO4)y(OH)z (1)In the formula, M is at least one element selected from a radical consisting of Mg, Ti, Cr, Mn, Co, Ni, Cu, Zn, Al, and Si, with 0≦a, c≦0.5, 1≦b≦2, 0.5≦x, y, z≦1.5. Other References
Field of SearchIron group metal (Fe, Co, or Ni)Sulfur containing Plural metal or metal and ammonium containing Hydrogen containing Alkali metal containing (Li, Na, K, Rb, or Cs) Iron containing Iron component is active material The alkali metal is lithium Vanadium (V), chromium (Cr), niobium (Nb), molybdenum (Mo), titanium (Ti), or tungsten (W) component is active material Alkaline earth metal or magnesium (Mg) component is active material Nickel component is active material Zinc component |
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