US 5,858,324 A · Lithium based compounds useful as electrodes and method for preparing same

Abstract

A process for preparing a compound that includes the steps of: (a) preparing a solution comprising (i) a chromium source, (ii) a manganese source, (iii) a lithium source, and (iv) an oxygen source, where the relative amounts of each of the sources is selected to yield, following step (c), a compound having the formula Li.sub.y Cr.sub.x Mn.sub.2-x O.sub.4+z where y.gtoreq.2, 0.25<x<2, and z.gtoreq.0; (b) treating the solution to form a gel; and (c) heating the gel under an inert atmosphere for a time and at a temperature sufficient to yield a compound having the formula Li.sub.y Cr.sub.x Mn.sub.2-x O.sub.4+z where y.gtoreq.2, 0.25<x<2, and z.gtoreq.0. The invention also features a compound having the formula Li.sub.y Cr.sub.x Mn.sub.2-x O.sub.4+z where y>2, 0.25<x<2, and z.gtoreq.0, and an electrode composition containing this compound.

Claims16

Dependent claims

A process for preparing a compound comprising the steps of:

(a) preparing a solution comprising (i) a chromium source, (ii) a manganese source, (iii) a lithium source, and (iv) an oxygen source,
the relative amounts of each of said sources being selected to yield, following step (c), a compound having the formula Li.sub.y Cr.sub.x Mn.sub.2-x O.sub.4+z where y.gtoreq.2, 0.25<x<2, and z.gtoreq.0;
(b) treating said solution to form a gel;
and
(c) heating said gel under an inert atmosphere for a time and at a temperature sufficient to yield a compound having the formula L.sub.y Cr.sub.x Mn.sub.2-x O.sub.4+z where y.gtoreq.2, 0.25<x<2, and z.gtoreq.0.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/840,872Filed 17 Apr 1997

Granted

12 Jan 1999

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
C01G 45/1242
Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof: of the type -, e.g. LiMn2O4 or LiO4
H01M 4/131
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/485
Of inorganic oxides or hydroxides: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy

Lithium based compounds useful as electrodes and method for preparing same

Life of this patent

Lithium based compounds useful as electrodes and method for preparing same

Life of this patent

Abstract

Claims16