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Electrochemical Energy Storage Systems and Methods Featuring Large Negative Half-Cell Potentials

  • US 20140028261A1
  • Filed: 07/24/2013
  • Published: 01/30/2014
  • Est. Priority Date: 07/27/2012
  • Status: Active Grant
First Claim
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1. A flow battery comprising:

  • a first half-cell comprising;

    a first aqueous electrolyte comprising a first redox active material; and

    a first carbon electrode in contact with said first aqueous electrolyte;

    a second half-cell comprising;

    a second aqueous electrolyte comprising a second redox active material; and

    a second carbon electrode in contact with said second aqueous electrolyte; and

    a separator disposed between said first half-cell and said second half-cell;

    said first half-cell having a half-cell potential equal to or more negative than about −

    0.3 V with respect to a reversible hydrogen electrode; and

    said first aqueous electrolyte having a pH in a range of from about 8 to about 13; and

    wherein the flow battery is capable of operating at a current density of at least about 25 mA/cm2.

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