Double chromate composition for use as a positive active material in batteries and battery
US4184016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1978 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Oct 17, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Novel double chromate compositions having the general formula: EQU MM'(CrO.sub.4).sub.2, wherein M and M' are silver and bismuth, respectively. Methods of making AgBi (CrO.sub.4).sub.2 are characterized by reacting silver dichromate with a bismuth salt to provide equal numbers of silver and bismuth atoms. These double chromate compositions have particular utility in batteries as active positive material. Due to the steadiness of discharge voltage and duration of discharge of batteries employing these double chromate compositions, such batteries are especially adapted for use in clocks and in cardiostimulators or pacemakers. PAC BACKGROUND OF THE INVENTION This invention relates to a new chemical composition, and more particularly to a double chromate having the formula MM' (CrO.sub.4).sub.2 where M and M' represent metals, to methods of making it, and to its use as a positive active material in batteries. From the disclosure of French Pat. No. 2,110,765, a lithium battery is known having positive active material constituting silver chromate having the formula Ag.sub.2 CrO.sub.4. One of the great interests in this type of battery is that the reduction in metallic silver occurs, with…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.