Apparatus and method for regenerating electrolyte of a redox flow battery
US4956244A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Deteriorated positive electrolyte containing Fe.sup.3 /Fe.sup.2+ ions for a redox flow battery is regenerated in a negative electrolyte chamber of an electrolyte regenerating apparatus. For this purpose, a formic acid solution is introduced into a positive electrolyte chamber of the electrolyte regenerating apparatus and a voltage is applied between a negative electrode of the negative electrolyte chamber and a positive electrode of the positive electrolyte chamber, whereby excessive Fe.sup.3+ ions in the deteriorated positive electrolyte are changed to Fe.sup.2+ ions for regeneration. The formic acid is changed into carbon dioxide which is not noxious. All gases generated by the regeneration are not noxious, whereby the regeneration can be carried out with safety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.