Method for preparing mixed amorphous vanadium oxides and their use as electrodes in reachargeable lithium cells
US5700598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Jul 11, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing an amorphous ternary lithiated vanadium metal oxide of the formula Li.sub.x M.sub.y V.sub.z O.sub.(x+5z+ny)/2, where M is a metal, 0<x.ltoreq.3, 0<y.ltoreq.3, 1.ltoreq.z.ltoreq.4, and n=2 or 3, comprising the steps of creating an aqueous solution of at least one metavanadate salt selected from the group consisting of NH.sub.4 VO.sub.3 and NaVO.sub.3, and a nitrate salt of the formula M(NO.sub.3).sub.n containing a large excess of a lithium salt; heating the solution; adding a sufficient amount of a base to obtain a suitable pH; and precipitating the amorphous lithiated vanadium metal oxide. A rechargeable lithiated intercalation battery cell comprising a positive electrode, a negative electrode, and an electrolyte, wherein the active material of the negative electrode is an amorphous ternary lithiated vanadium metal oxide of the formula Li.sub.x M.sub.y V.sub.z O.sub.(x+5z+ny)/2 or an amorphous binary non-lithiated vanadium metal oxide of the formula M.sub.y V.sub.z O.sub.(5z+ny)/2, prepared according to the methods of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.