Electrochemical energy storage systems and methods featuring high open circuit potential
First Claim
1. A flow battery comprising:
- a first aqueous electrolyte comprising a first redox active material;
a second aqueous electrolyte comprising a second redox active material;
a first electrode in contact with said first aqueous electrolyte in a first chamber containing said first aqueous electrolyte;
a second electrode in contact with said second aqueous electrolyte in a second chamber containing said second aqueous electrolyte; and
a separator disposed between said first aqueous electrolyte and said second aqueous electrolyte;
wherein said first aqueous electrolyte and said second aqueous electrolyte are chosen such that said flow battery has an open circuit potential of at least 1.5 V, and said flow battery is capable of operating at a current density of at least 50 mA/cm2;
wherein said first redox active material remains soluble in said first aqueous electrolyte in both a charged state and a discharged state thereof, and said second redox active material remains soluble in said second aqueous electrolyte in both a charged state and a discharged state thereof; and
wherein the flow battery contains only two electrolytes.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention concerns flow batteries comprising: a first aqueous electrolyte comprising a first redox active material; a second aqueous electrolyte comprising a second redox active material; a first electrode in contact with the first aqueous electrolyte; a second electrode in contact with the second aqueous electrolyte and a separator disposed between the first aqueous electrolyte and the second aqueous electrolyte; the flow battery having an open circuit potential of at least 1.4 V, and is capable of operating or is operating at a current density at least about 50 mA/cm2, wherein both of the first and second redox active materials remain soluble in both the charged and discharged states. In certain embodiments, the redox active materials are metal ligand coordination compounds. The disclosure also describes systems comprising these flow batteries and methods of them.
126 Citations
22 Claims
-
1. A flow battery comprising:
-
a first aqueous electrolyte comprising a first redox active material; a second aqueous electrolyte comprising a second redox active material; a first electrode in contact with said first aqueous electrolyte in a first chamber containing said first aqueous electrolyte; a second electrode in contact with said second aqueous electrolyte in a second chamber containing said second aqueous electrolyte; and a separator disposed between said first aqueous electrolyte and said second aqueous electrolyte; wherein said first aqueous electrolyte and said second aqueous electrolyte are chosen such that said flow battery has an open circuit potential of at least 1.5 V, and said flow battery is capable of operating at a current density of at least 50 mA/cm2; wherein said first redox active material remains soluble in said first aqueous electrolyte in both a charged state and a discharged state thereof, and said second redox active material remains soluble in said second aqueous electrolyte in both a charged state and a discharged state thereof; and wherein the flow battery contains only two electrolytes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification