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US 12,155,103 B2Granted
Electrochemical storage devices comprising chelated metals
AssigneeThe Regents of the University of Colorado, a body corporate
InventorsScott Waters, Michael Marshak, Brian Hallett Robb
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Abstract
Metal chelates, methods of making the metal chelate, electrolyte formulations comprising metal chelates, and electrochemical devices for energy storage using or including at least one metal chelate are disclosed. The disclosure also relates to a method to provide a metal to an electrolyte in a flow battery to plate an electrode while the electrode is in the battery.
Claims24
A flow battery electrolyte solution, comprising:
- a metal component;
- a chelate component;
- a buffer;
- and
- a counter ion;
- wherein the metal component is a transition metal;
- wherein greater than 99 mol % of the metal component in the electrolyte solution is complexed to a chelate component to thereby form a metal chelate;
- wherein the electrolyte solution comprises K[Cr(PDTA)];
- wherein at least a portion of the chelate component is uncomplexed and serves as a buffer;
- and
- wherein the electrolyte solution has a pH of between 6 and 11.
8 more elements
A flow battery electrolyte solution, comprising:
- a metal component;
- a chelate component;
- a buffer;
- and
- a counter ion;
- wherein at least a portion of the metal component complexes with at least a portion the chelate component to thereby form a metal chelate;
- wherein the metal component is a transition metal;
- wherein the chelate component comprises PDTA;
- wherein the electrolyte solution comprises K[Cr(PDTA)];
- and
- wherein the buffer comprises K2B4O7, K2HPO4, Na2B4O7, uncomplexed BDTA, uncomplexed CyDTA, uncomplexed EDTA, uncomplexed NTA, uncomplexed PDTA, or any combination thereof.
8 more elements
A flow battery electrolyte solution, comprising:
- a metal component;
- a chelate component;
- a buffer;
- and
- a counter ion;
- wherein at least a portion of the metal component complexes with at least a portion the chelate component to thereby form a metal chelate;
- wherein the metal component is a transition metal;
- wherein the chelate component is EDTA;
- and
- wherein the buffer comprises uncomplexed BDTA, uncomplexed CyDTA, uncomplexed EDTA, uncomplexed NTA, uncomplexed PDTA, or any combination thereof.
7 more elements
Dependencies are inferred from the claim text.