Process of preparing a surface-treated positive active...

Details Process of preparing a surface-treated positive active... Process of preparing a surface-treated positive active...

2003-04-09

2008-11-04

Ruthkosky, Mark (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S223000, C429S224000

Reexamination Certificate

active

07445871

ABSTRACT:
A process of manufacturing a positive active material for a lithium secondary battery includes adding a metal source to a doping element-containing coating liquid to surface-treat the metal source, wherein the metal source is selected from the group consisting of cobalt, manganese, nickel, and combination thereof; drying the surface-treated metal source material to prepare a positive active material precursor; mixing the positive active material precursor with a lithium source; and subjecting the mixture to heat-treatment. Alternatively, the above drying step during preparation of the positive active material precursor is substituted by preheat-treatment or drying followed by preheat-treatment.

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