Lithium-nickel-cobalt-maganese containing composite oxide,...

Details Lithium-nickel-cobalt-maganese containing composite oxide,... Lithium-nickel-cobalt-maganese containing composite oxide,...

2008-06-10

2008-06-10

Kalafut, Stephen J. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S224000, C429S231300, C423S594300, C423S594400, C423S594500, C423S594600, C423S599000

Reexamination Certificate

active

07384706

ABSTRACT:
Coagulated particles of nickel-cobalt-manganese hydroxide wherein primary particles are coagulated to form secondary particles are synthesized by allowing an aqueous solution of a nickel-cobalt-manganese salt, an aqueous solution of an alkali-metal hydroxide, and an ammonium-ion donor to react under specific conditions; and a lithium-nickel-cobalt-manganese-containing composite oxide represented by a general formula, LipNixMn1-x-yCoyO2-qFq(where 0.98≦p≦1.07, 0.3≦x≦0.5, 0.1≦y≦0.38, and 0≦q≦0.05), which is a positive electrode active material for a lithium secondary cell having a wide usable voltage range, a charge-discharge cycle durability, a high capacity and high safety, is obtained by dry-blending coagulated particles of nickel-cobalt-manganese composite oxyhydroxide formed by making an oxidant to act on the coagulated particles with a lithium salt, and firing the mixture in an oxygen-containing atmosphere.

REFERENCES:
patent: 6613479 (2003-09-01), Fukuzawa et al.
patent: 2004/0091779 (2004-05-01), Kang et al.
patent: 2002-184402 (2002-06-01), None

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