Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1994-10-24
1995-12-12
Bell, Bruce F.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423593, 423594, C01G 3714
Patent
active
054747520
ABSTRACT:
A method of producing active cathode material for lithium secondary battery is provided. In accordance with this invention, a mixture of a lithium salt and a transition metal salt is baked in oxygen atmosphere, wherein the oxygen pressure during baking is about 147.1 kPa or more. The lithium transition metal compound oxides prepared have the composition, Li.sub.x Ni.sub.y M.sub.1-y O.sub.2, wherein M is one kind of transition metal or more, and x and y respectively have the values 0.05.ltoreq.x.ltoreq.1.10 and 0.5.ltoreq.y.ltoreq.1.0. The active cathode material for a lithium secondary battery according to this invention, provides lithium transition metal compound oxides which are uniform in composition and characteristic, and exhibit excellent functioning as an active cathode material. Lithium secondary batteries produced therewith exhibit excellent cycle characteristics, high energy densities and low material costs, are of uniform quality and exhibit no unevenness of battery capacity.
REFERENCES:
patent: 5180574 (1993-01-01), Von Sacken
patent: 5264201 (1993-11-01), Dahn et al.
patent: 5370948 (1994-12-01), Hasegawa et al.
Bell Bruce F.
Sony Corporation
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