Electrolyte Rebalancing System

Abstract: A process for rebalancing the electrolyte system in a regenerative fuel cell using a sulfide/polysulfide reaction in one half of the cell and a bromine/bromide reaction in the other half of the cell comprises passing the electrolyte containing sulfide/polysulfide or bromine/bromide through the + chamber of an auxiliary cell and passing an electrolyte containing water and being free from polysulfide or bromine through the - chamber of the auxiliary cell, the auxiliary cell operating so as to oxidise sulfide ions to sulfur or bromide ions to bromine in the + chamber and to reduce water to hydrogen and hydroxide ions in the - chamber.

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