Electrochemical energy storage systems and methods featuring large negative half-cell potentials
First Claim
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;
wherein said first half-cell has a half-cell potential ranging between −
0.3 V and −
0.7 V with respect to a reversible hydrogen electrode, said first aqueous electrolyte has a pH ranging between 8 and 13, and the flow battery is capable of operating at a current density ranging between 25 mA/cm2 and 500 mA/cm2.
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Accused Products
Abstract
The invention concerns flow batteries comprising: a first half-cell comprising: (i) a first aqueous electrolyte comprising a first redox active material; and a first carbon electrode in contact with the first aqueous electrolyte; (ii) a second half-cell comprising: a second aqueous electrolyte comprising a second redox active material; and a second carbon electrode in contact with the second aqueous electrolyte; and (iii) a separator disposed between the first half-cell and the second half-cell; the 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 the first aqueous electrolyte having a pH in a range of from about 8 to about 13, wherein the flow battery is capable of operating or is operating at a current density at least about 25 mA/cm2.
126 Citations
14 Claims
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1. A flow battery comprising:
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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; wherein said first half-cell has a half-cell potential ranging between −
0.3 V and −
0.7 V with respect to a reversible hydrogen electrode, said first aqueous electrolyte has a pH ranging between 8 and 13, and the flow battery is capable of operating at a current density ranging between 25 mA/cm2 and 500 mA/cm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification