US 7,396,614 B2 · Lithium and vanadium oxide, a preparation method thereof and the use of same as an active electrode material

Abstract

A lithium and vanadium oxide is described having the formula Li1+xV3O8, wherein 0.1≦×≦0.25. The oxide has a monoclinic crystalline structure and comprises non-agglomerated grains in the form of monocrystalline pellets having a length L of between 1 and 100 μm, a width W such that 4<L/W<100, and a thickness t such that 4 L/t<100, with t<W, the elongation axis of the pellets being axis b of the monoclinic cell. The oxide may be prepared by mixing the Li and V precursors, without grinding or compression, heating said mixture to 565° C.-585° C. and de-agglomerating the product obtained. The oxide is suitable for use as an active material for the positive electrode of a lithium battery.

Claims40

Dependent claims

A lithium vanadium oxide which corresponds to the formula Li1+xV3O8 in which 0.1≦×≦0.25, which has a monoclinic crystalline structure and which comprises nonagglomerated grains in the form of monocrystalline rods:

which have a length L of between 1 and 100 μm, a width w such that 4<L/w<100, and a thickness t such that 4<L/t<100, with t<w;
the elongation axis of which is the b axis of the monoclinic unit cell.

Dependencies are inferred from the claim text.

Facts

Application

10/493,758Filed 8 Oct 2002

Priority

FR 01 1382125 Oct 2001

Published

US 2005/0026041 A13 Feb 2005

Granted

8 Jul 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 4/131
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/136
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/40
Of elements or alloys: alloys based on alkali metals
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 and vanadium oxide, a preparation method thereof and the use of same as an active electrode material

Life of this patent

Lithium and vanadium oxide, a preparation method thereof and the use of same as an active electrode material

Life of this patent

Abstract

Claims40