Method for producing a complex oxide used as a cathode active ma

Details Method for producing a complex oxide used as a cathode active ma Method for producing a complex oxide used as a cathode active ma

1998-04-23

1999-11-09

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Metal compound containing

2525212, 25251921, 423592, 423594, H01B 108, H01B 114, C01B 1320

Patent

active

059807865

ABSTRACT:
A method for producing a cathode active material for a lithium secondary battery having a large initial capacity and excellent in the charging-discharging cycle characteristics, while restraining the generation of NO.sub.2, is provided. In the production method of a cathode active material for a lithium secondary battery made up of a complex oxide containing at least lithium, after adding a material generating oxygen on spray pyrolysis, such as nitric acid, hydrogen peroxide, etc., to an aqueous or alcohol solution of the organic acid salts of metal elements constituting the complex oxide, the mixture is subjected to spray pyrolysis to form a complex oxide, and the complex oxide is heat-treated. As the complex oxides, there are a lithium manganese complex oxide, a lithium cobalt complex oxide, a lithium nickel complex oxide, etc.

REFERENCES:
patent: 5496664 (1996-03-01), Sterr
patent: 5742070 (1998-04-01), Hayshi
Takashi Ogihara, et al.; "Preparation of Spherical LIC002 Powders by the Ultrasonic Spray Decomposition and its Application to Cathode Active Material in Lithium Secondary Battery"; Journal of the Ceramic Society of Japan; International Edition; vol. 101, No. 10, Oct. 1, 1993; pp. 1128-1132.

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