Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1990-07-23
1993-11-23
Breneman, R. Bruce
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
429209, 429218, 429223, 429224, C01D 102
Patent
active
052642011
ABSTRACT:
Lithiated nickel dioxide cathode-active materials for electrochemical cells aving the formula Li.sub.x Ni.sub.2-x-y M.sub.y O.sub.2, with x being between about 0.8 and about 1.0, M being one or more metals selected from cobalt, iron, chromium, titanium, manganese and vanadium, and y being less than about 0.2, with the proviso that y is less than about 0.5 for cobalt, which material is substantially free of lithium hydroxide and lithium carbonate. The materials are prepared by providing a substantially homogeneous dry intermediate mixture of a starting material containing a nickel compound selected from nickel oxide, nickel hydroxide, and mixtures thereof, and optionally including one or more oxides or hydroxides of a transition metal selected from cobalt, iron, chromium, titanium, manganese and vanadium, together with between about a 10 and about a 25% stoichiometric excess of lithium hydroxide. The mixture is heat treated at a temperature above about 600.degree. C. in an atmosphere substantially free of carbon dioxide and having a partial pressure ratio of oxygen to water vapor greater than about 15, after which any lithium hydroxide or lithium carbonate present in the mixture is removed. Thermally stable lithiated nickel dioxide having a BET surface area less than about 3.0 m.sup.2 /g, and is also disclosed, as well as electrochemical cells prepared from the disclosed lithiated nickel dioxides.
REFERENCES:
patent: 4302518 (1981-11-01), Goodenough et al.
patent: 4567031 (1986-01-01), Riley
patent: 4959282 (1990-09-01), Dahn et al.
patent: 4980080 (1990-12-01), Lecerf et al.
patent: 5180574 (1993-01-01), von Sacken
Gummow et al., Mat. Res. Bull., 27(3), 327-37 (1992).
Dyer et al., JACS, 76, 1499-1503 (1954).
Bronger et al., Z. Anorg. Allg. Chem., 333, 188-200 (1956).
Goodenough et al., J. Phys. Chem. Solids, 5, 107-16 (1958).
Goodenough et al., J. App. Phys., 29(3), 382-3 (1958).
Fensham, JACS, 76, 969-71 (1954).
Dahn Jeffery R.
Fong Rosamaria
Sacken Ulrich Von
Breneman R. Bruce
Her Majesty the Queen in right of the Province of British Columb
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