Positive active material for lithium secondary battery and secondary battery comprising the same

• Main Authors: LEE, JOON-HYOUNG, LEVIN, OLEG, KVASHA, ANDRIY
• Format: Patent
• Language: English; French; German
• Published: 02.05.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A positive active material for a lithium secondary battery comprises a core comprising a compound that can reversibly intercalate and deintercalate lithium; and a lithium ion conductive ceramic compound attached to the surface of the core and represented by Chemical Formula 1: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ [Chemical Formula 1]€ƒ€ƒ€ƒLi 1+x M(I)M(II) 2-x Si y P 3-y O 12 , wherein M(I) and M(II) are selected from the group consisting of Al, Zr, Hf, Ti, Ge, Sn, Cr, Nb, Ga, Fe, Sc, In, Y, La, Lu, and Mg, and 0<x‰¤0.7, 0‰¤y‰¤ 1.