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Zinc-bromide secondary cell

  • US 3,929,506 A
  • Filed: 05/18/1973
  • Issued: 12/30/1975
  • Est. Priority Date: 05/18/1973
  • Status: Expired due to Term
First Claim
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1. A METHOD OF OPERATING A ZINC-BROMIDE SECONDARY CELL DIVIDED INTO ANODE AND CAHODE COMPARTMENTS BY A ZINC CAION ION EXCHANGE DIAPHRAGM COMPRISING ADDING A CATHOLYTE CONSISTING ESSENTIALLY OF AN AQOUEOUS SOLUTION OF AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM BROMIDE AND THE BROMIDES OF LITHIUM, SODIUM, POTASSIUM, BERYLLIUM, MAGNESIUM, CALCIUM, AND STRONTIUM TO THE CATHODE COMPARTMENT WITH A CATHODE DISPOSED THEREIN;

  • ADDING AN ANOLYTE CONSISTING ESSENTIALLY OF AN ESSENTIALLY BROMIDE ION FREE, AQUEOUS SOLUTION CONTAINING AT LEAST ONE SALT SELECTED FROM THE GROUP CONSISTING OF ZINC CHLORATE, ZINC CHLORIDE, ZINC IODIDE, ZINC TETRAFLUOROBORATE, ZINC FLUORODSILICATE AND ZINC NITRATE TO THE ANODE COMPARTMENT WITH AN ANODE DISPOSED THEREIN;

    IMPRESSING AN ELECTROMOTIVE FORCE BETWEEN THE ANODE AND THE CATHODE TO DEPOSIT METALLIC ZINC ON THE ANODE, RELEASE BROMINE AT THE CATHODE AND PASS SUBSTANTIALLY ONLY CATIONS THROUGH THE DIAPHRAGM INTO THE ANODE COMPARTMENT.

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