Electrochemical cell with new fast ion conductors
US4302518A · kind A · utility
Inventors
Key dates
| Filing date | Mar 31, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Mar 31, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M4/525
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is interest in the use of solid-solution electrodes as a way of meeting the problems of conventional batteries; Li.sub.a TiS.sub.2 where O<a<1 is known in this respect and may be made by high temperature preparative routes. Fast ion conductors of the formula A.sub.x M.sub.y O.sub.2 where A is Li, Na or K, M is a transition metal e.g. Co or Ni, <x<1 and y.apprxeq.1 have been made for this purpose according to the invention. They cannot be made by high temperature routes when x is substantially less than 1 owing to stability problems. In the invention, they have been made by electrochemical extraction of A.sup.+ ions from compounds of the formula A.sub.x' M.sub.y O.sub.2 where O<x'<1, carried out at low temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.