Non-aqueous electrolyte secondary battery

Details Non-aqueous electrolyte secondary battery Non-aqueous electrolyte secondary battery

2005-11-22

2005-11-22

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Flat-type unit cell and specific unit cell components

C429S163000, C429S233000, C429S224000, C429S231100, C429S231300, C429S316000, C429S317000, C429S324000

Reexamination Certificate

active

06967066

ABSTRACT:
A non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode collector, on which a positive electrode active material layer containing a positive electrode active material as a complex oxide of Li and transition metals are formed, and a negative electrode having a negative collector, on which a negative electrode active material layer is formed. The non-aqueous electrolyte secondary battery is a gel or solid non-aqueous electrolyte secondary battery having a battery device in which a positive electrode and a negative electrode are laminated with an electrolyte layer therebetween in a film-state packaging member constructed by metal foil laminated films, and containing a lithium salt, a non-aqueous solvent, and a polymer material. The concentration in mass ratio of a free acid in the electrolyte layer is 60 ppm and less. Average particle diameter of the positive electrode active material lies in a range from 10 to 22 μm, the minimum particle diameter is 5 μm or larger, the maximum particle diameter is 50 μm or smaller, and specific surface of the positive electrode active material is 0.25 m2/g or smaller. Lithium carbonate (Li2CO3) contained in the positive electrode active material is 0.15 percent by weight and less. Moisture contained in the positive electrode active material is 300 ppm and less.

REFERENCES:
patent: 5976731 (1999-11-01), Negoro et al.
patent: 2003/0087161 (2003-05-01), Topsoe
patent: 0 895 296 (1999-02-01), None
patent: 2 761 531 (1998-03-01), None
patent: 11283668 (1999-10-01), None
patent: WO 98/26469 (1998-06-01), None
patent: WO 99/34471 (1999-07-01), None
Database WPI—Section CH, Week 199938, Derwent Publications Ltd., London , GB;, An 1999-449698, XP002287077 & JP 11 185811A (Tonen Corp), published Jul. 9, 1999, abstract.
Europeam Search Report filed Aug. 23, 2004.

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