Positive electrode active material for non-aqueous...

Details Positive electrode active material for non-aqueous... Positive electrode active material for non-aqueous...

2007-03-22

2009-10-20

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

Reexamination Certificate

active

07604899

ABSTRACT:
To provide a positive electrode active material for a non-aqueous electrolyte secondary battery, which if used as a positive electrode for a lithium ion secondary battery, the battery internal resistance can be reduced, giving a secondary battery superior in output characteristics and life property. After mixing raw material powders in specified quantities of each so as to become a lithium-metal complex oxide represented by LizNi1-wMwO2(wherein M is at least one kind or more of metal elements selected from the group consisting of Co, Al, Mg, Mn, Ti, Fe, Cu, Zn, and Ga; and w and z respectively satisfy 0<w≦0.25, and 1.0≦z≦1.1), baking is performed in two stages. At first the temperature is raised from room temperature to a first stage baking temperature (450 to 550° C.) at a temperature rise rate of 0.5 and 15° C./min, and held for 1 to 10 hours. Then the temperature is raised to a second stage baking temperature (650 to 800° C.), and held for 0.6 to 30 hours.

REFERENCES:
patent: 2005/0147889 (2005-07-01), Ohzuku et al.
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patent: 2000-323123 (2000-11-01), None
patent: 2001-52704 (2001-02-01), None

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