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Fuel system using redox flow battery

  • US 9,293,781 B2
  • Filed: 08/12/2015
  • Issued: 03/22/2016
  • Est. Priority Date: 04/06/2009
  • Status: Active Grant
First Claim
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1. A bipolar electrochemical cell, comprising:

  • a terminal anode current collector;

    a first ion-permeable membrane spaced from the terminal anode current collector and at least partially defining a first anode;

    a bipolar electrode spaced from the first ion-permeable membrane and at least partially defining a first cathode between the first ion-permeable membrane and a first surface of the bipolar current collector;

    a second ion-permeable membrane spaced from the bipolar current collector and at least partially defining a second anode between the second ion-permeable membrane and a second surface of the bipolar current collector; and

    a terminal cathode current collector spaced from the second ion-permeable membrane and at least partially defining a second cathode between the terminal cathode current collector and the second ion-permeable membrane,wherein at least one of the first anode, the second anode, the first cathode, and the second cathode includes a semi-solid or condensed liquid ion-storing redox composition, the semi-solid or condensed liquid ion-storing redox composition including a conductive additive and an ion-storing solid phase;

    wherein a volume percentage of the ion-storing solid phase is between 20% and 70%, andwherein the semi-solid or condensed liquid ion-storing redox composition is capable of taking up or releasing ions, and remains substantially insoluble during operation of the cell.

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