Positive electrode for nonaqueous electrolyte secondary...

Details Positive electrode for nonaqueous electrolyte secondary... Positive electrode for nonaqueous electrolyte secondary...

2011-05-31

2011-10-25

Maples, John S (Department: 1728)

Metal working

Method of mechanical manufacture

Electrical device making

C427S126600, C429S223000, C429S224000, C429S231300

Reexamination Certificate

active

08043387

ABSTRACT:
A production method for a positive electrode for a nonaqueous electrolyte secondary battery that includes a positive electrode active material capable of intercalating and deintercalating a lithium ion, a conductive agent and a binder, in which the positive electrode active material is produced by coating cobalt-based lithium composite oxide represented by a general formula: LiaCO1-sM1sO2with lithium nickel cobalt manganese oxide of general formula: LibNitCOuMnvO2, ratio r1/r2of the average particle diameter r1of the cobalt-based lithium composite oxide and the average particle diameter r2of the lithium nickel cobalt manganese oxide being 2≦r1/r2≦50, and the average particle diameter r2of the lithium nickel cobalt manganese oxide is 0.5 μm≦r2≦20 μm. A positive electrode produced by such method results in a nonaqueous electrolyte secondary battery having enhanced energy density and capacity and retention characteristic when charging/discharging is repeated at a high potential of 4.5 V based on lithium.

REFERENCES:
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patent: 2006/0275667 (2006-12-01), Watanabe et al.
patent: 2007/0122338 (2007-05-01), Park et al.
patent: 2009/0181296 (2009-07-01), Lampe-Onnerud et al.
patent: 09-306546 (1997-11-01), None
patent: 2004-127694 (2004-04-01), None
patent: 2005-317499 (2005-11-01), None

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