Process for preparing positive electrode active material, and no

Details Process for preparing positive electrode active material, and no Process for preparing positive electrode active material, and no

1997-03-25

1999-11-16

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

423138, 423594, H01M 452, C01G 4900

Patent

active

059854880

ABSTRACT:
A process for preparing lithium nickeloxide (LiNiO.sub.2) for use as a positive electrode active material for a nonaqueous secondary battery, which comprises the steps of: (a) using as the raw materials a lithium compound and a nickel compound at least one of which has a melting point not higher than 300.degree. C.; i) in case where both of the lithium compound and the nickel compound have a melting point not higher than 300.degree. C., mixing the above two compounds after their melting, or mixing the above compounds, melting the mixture and mixing the melted mixture; ii) in case where either one of the lithium compound and the nickel compound has a melting point higher than 300.degree. C., mixing said one having a melting point higher than 300.degree. C. with the remaining one before or after its melting; (b)calcining the resulting mixture at a temperature of 700.degree. C. to 950.degree. C. in air or in an atmosphere containing oxygen in a higher concentration than an atmospheric oxygen concentration.

REFERENCES:
patent: 4980080 (1990-12-01), Lecerf et al.
patent: 5565688 (1996-10-01), Hayashi
patent: 5728367 (1998-03-01), Mao
patent: 5759717 (1998-06-01), Amine et al.
Patent Abstracts of Japan, vol. 018, No. 551 (E-1619), Oct. 20, 1994 & JP 06 203834 A (Masayuki Yoshio; Others: 02), Jul. 22, 1994.

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