Molten-salt electrolyte unitized regenerative hydrogen-halogen fuel cell with anion transfer

An electrochemical device comprising:

• a cell including a molten salt separator between a plurality of chambers, each chamber corresponding to a respective side of the molten salt separator;
• a fluidic coupling for a first energy component;
• a fluidic coupling for a second energy component, the first and second energy components adapted for ionic transfer;
• a stable electrode attached to each side of the separator for defining a two-phase electrochemical interface, the stable electrode resistant to chemical degradation from the first or second energy component or from the molten salt separator, the stable electrode suitable for electron transfer with the energy component in the corresponding chamber and
• the molten salt separator including a combination of a plurality of molten salts adapted for negative ion transfer, the negative ions further comprising halides, the molten salt separator being a porous ceramic or polymer substrate impregnated with molten salt in a predetermined combination, the combination of salts having a melting point lower than any of the plurality of salts individually the molten salts providing an operating temperature greater than that for supporting aqueous processes and sufficiently low for supporting polymer based containment structures, wherein:
• the first energy component is bromine;
• the second energy component is hydrogen;
• and
• the molten salt separator is responsive to transfer of negative bromide ions across the separator for providing for providing a potential.