Electrochemical cell
US5316877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1993 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Aug 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrochemical cell comprises a cell housing, and a cathode located in the cell housing. The cathode comprises at least one electrochemically active compound of lithium, manganese and oxygen. The compound has a spinel-type structure and has the general formula EQU Li.sub.1 D.sub.x/b Mn.sub.2-x O.sub.4+.delta. where PA0 (i) x is a number such that 0.ltoreq.x<0,33; PA0 (ii) .delta. is a number such that 0.ltoreq..delta.<0,5, with the values of x and .delta. being such that the oxidation state N of the manganese cation is 3,5<N<4,0; PA0 (iii) D is a mono- or multi-valent metal cation; and PA0 (iv) b is the oxidation state of D. An electrolyte is also located in the cell housing. The cell housing, electrolyte and cathode are arranged to permit a charging potential to be applied to the cell to cause lithium from the cathode to form, in the cell housing, at least part of the anode, while the electrolyte couples the cathode electrochemically to the anode, and insulates it electronically therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.