Process for preparing cathode active material by a sol-gel metho

Details Process for preparing cathode active material by a sol-gel metho Process for preparing cathode active material by a sol-gel metho

1996-12-17

1999-06-22

Straub, Gary P.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

516 33, 516 98, C01G 5104

Patent

active

059140941

ABSTRACT:
A process for preparing a LiCoO.sub.2 or LiNiO.sub.2 powder comprising the steps of dissolving lithium nitrate, lithium acetate or lithium hydroxide and cobalt nitrate, cobalt acetate, cobalt oxide or cobalt hydroxide; or dissolving lithium nitrate, lithium acetate or lithium hydroxide, and nickel nitrate, nickel acetate, nickel oxide or nickel hydroxide to produce a mixed solution, sufficiently mixing the mixed solution with a chelating agent, polyacrylic acid, malic acid or polyvinyl butyral, slowly heating the above to produce a sol, continuously and slowly heating the sol to produce a gel precursor, heating the gel precursor to produce a precursor powder, and calcining the precursor powder to produce a LiCoO.sub.2 or LiNiO.sub.2 powder is simple and economic. The particles of the powder produced by the process are so microscopic and have a high specific surface area that cathode material of a lithium based secondary cell using the powder shows preferable properties.

REFERENCES:
patent: 4567031 (1986-01-01), Riley
patent: 5211933 (1993-05-01), Barboux et al.

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