Vanadium redox battery electrolyte

H - Electricity – 01 – M

Patent

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Details

H01M 8/08 (2006.01) H01M 8/18 (2006.01) H01M 8/20 (2006.01) H01M 8/22 (2006.01)

Patent

CA 2447681

The present invention relates generally to the production of a vanadium electrolyte, including a mixture of trivalent and tetravalent vanadium ions in a sulphuric acid solution, by the reactive dissolution of vanadium trioxide and vanadium pentoxide powders, the surface area and particle size characteristics being controlled for complete reaction to produce the desired ratio of V(III) to V(IV) ions in the solution. The solution may be suitable for direct use in the vanadium redox battery, or the solution can provide an electrolyte concentrate or slurry which can be reconstituted by the addition of water or sulphuric acid prior to use in the vanadium redox battery.

L'invention concerne, de façon générale, la production d'un électrolyte au vanadium comprenant un mélange d'ions vanadium trivalents et tétravalents dans une solution d'acide sulfurique, par mise en solution, donnant lieu à une réaction, de poudres de trioxyde de vanadium et de pentoxyde de vanadium, les caractéristiques d'aire spécifique et granulométriques étant ajustées de manière à avoir une réaction complète en vue d'obtenir le rapport désiré entre les ions V(III) et les ions V(IV) dans la solution. La solution peut convenir pour l'utilisation directe dans la batterie redox au vanadium, ou bien peut fournir un concentrat ou une bouillie d'électrolyte pouvant être reconstitué par addition d'eau ou d'acide sulfurique avant utilisation dans la batterie redox au vanadium.

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