Process for positive electrode active substance for lithium...

Details Process for positive electrode active substance for lithium... Process for positive electrode active substance for lithium...

2011-07-19

2011-07-19

Cantelmo, Gregg (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S128000, C429S231950, C423S594600, C252S182100

Reexamination Certificate

active

07981547

ABSTRACT:
A positive electrode active material for a lithium secondary battery containing a lithium-cobalt composite oxide is produced by firing, as a cobalt source, a mixture of substantially spherical cobalt hydroxide or tricobalt tetraoxide having such a sharp particle size distribution that the average particle size D50 is from 7 to 20 μm, and cobalt oxyhydroxide having an average particle size of secondary particles formed by agglomeration of primary particles of from 7 to 20 μm, in a proportion of from 5:1 to 1:5 as the cobalt atomic ratio, at a temperature of from 700° C. to 1050° C. in an oxygen-comprising atmosphere.

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