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Electrically rechargeable anionically active reduction-oxidation electrical storage-supply system

  • US 4,485,154 A
  • Filed: 09/08/1981
  • Issued: 11/27/1984
  • Est. Priority Date: 09/08/1981
  • Status: Expired due to Term
First Claim
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1. An electrically rechargeble anionically active reduction-oxidation electrical energy storage and supply system comprising:

  • an electrochemical cell comprising an anolyte compartment and a catholyte compartment separated by an ion selective membrane permeable to positive sodium and potassium ions and substantially impermeable to negative bromide, chloride, iodide, sulfide and polysulfide ions and a first and a second electrode disposed in said anolyte and catholyte compartments, respectively;

    anolyte supply means providing anionically active ions in an aqueous solution electrochemically reactable anolyte in contact with said first electrode, said first electrode being substantially chemically non-reactive with said anolyte;

    catholyte supply means providing anionically active ions in an aqueous solution electrochemically reactable catholyte in contact with said second electrode, said second electrode being substantially chemically non-reactive with said catholyte;

    said anolyte and said catholyte having all active reduction-oxidation couples as anions; and

    an external electrical circuit in electrical communication with said first and second electrodes, said electrical circuit comprising an electrical load means and a direct current supply means for applying charging voltage to said electrodes electrically connected in parallel in said circuit between said electrodes, and switching means for electrical circuit selection between said load means, said supply means, and an open circuit.

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