Method for preparing an active substance of lithium secondary ce

Details Method for preparing an active substance of lithium secondary ce Method for preparing an active substance of lithium secondary ce

1994-09-21

1996-10-15

Gorgos, Kathryn

Compositions

Compositions containing a single chemical reactant or plural...

252518, 429218, 429220, 429224, 423599, 423604, 423642, H01M 488

Patent

active

055656889

ABSTRACT:
A method for preparing an active substance for positive electrode in non-aqueous electrolytic secondary cells making use of a lithium or lithium alloy negative electrode is described. The method comprises providing an amorphous citrate complex of lithium and a transition metal and firing the complex at a predetermined temperature to obtain an active substance. The citrate complex is obtained by preparing an aqueous mixed solution of lithium hydroxide or carbonate, a water-soluble transition metal salt and citric acid and dehydrating the mixed solution to obtain an amorphous citrate complex. The complex is then fired at a temperature ranging from 300.degree. to 900.degree. C. to obtain an active substance.

REFERENCES:
patent: 5378560 (1995-01-01), Tomiyama
"Lithium Insertion Into Manganese Spinels" by M. M. Thackeray et al; Material Research Bulletin, vol. 18, No. 4; 1983; pp. 461-472 no month available.

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