Lithium ion secondary battery

Details Lithium ion secondary battery Lithium ion secondary battery

2004-02-05

2008-12-09

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231950, C429S231600, C429S231900

Reexamination Certificate

active

07462421

ABSTRACT:
A positive electrode active material for a lithium ion secondary battery is a lithium-containing composite oxide represented by the chemical formula: Lia(Co1-x-yMgxAly)bMzOc, where M is at least one element selected from the group consisting of Na and K, and the values a, b, c, x, y and z respectively satisfy 0≦a≦1.05, 0.005≦x≦0.15, 0.0001≦y≦0.01, 0.0002≦z≦0.008, 0.85≦b≦1.1 and 1.8≦c≦2.1.This makes it possible to improve a high temperature storage characteristics and safety of the lithium ion secondary battery.

REFERENCES:
patent: 6783890 (2004-08-01), Kweon et al.
patent: 6805996 (2004-10-01), Hosoya
patent: 7150940 (2006-12-01), Okochi et al.
patent: 06-150929 (1994-05-01), None
patent: 06-168722 (1994-06-01), None
patent: P2000-123834 (2000-04-01), None
patent: P2002-203553 (2002-07-01), None

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