Nonaqueous redox flow battery electrolyte comprising an ionic liquid with a metal cation coordinated to redox-active ligands

DWPI Title: Electrolyte for nonaqueous redox flow battery, comprises redox-active ionic liquid comprising metal coordination cation comprising transition metal ions, coordinated to redox-active ligands comprising aminoalcohol/dialkanolamine, and anion
Abstract: Nonaqueous redox flow batteries (RFB) hold the potential for high energy density grid scale storage, though are often limited by the solubility of the redox-active species in their electrolytes. A systematic approach enables an increase the concentration of redox-active species in electrolytes for nonaqueous RFB, starting from a metal-coordination-cation-based ionic liquid. As an example, starting with an ionic liquid consisting of a metal coordination cation (MetIL), ferrocene-containing ligands and iodide anions can be substituted into the original MetIL structure, enabling a nearly 4× increase in capacity compared to original MetIL structure. Application of this strategy to other chemistries, optimizing electrolyte melting point and conductivity could yield >10 M redox-active electrons.
Use: Electrolyte is used for nonaqueous redox flow battery which is rechargeable battery.
Advantage: The electrolyte has improved ionic conductivity, and provides nonaqueous redox flow battery having high energy density and improved capacity.
Novelty: A nonaqueous redox flow battery electrolyte comprises a redox-active ionic liquid comprising a metal coordination cation comprising transition metal ions, coordinated to redox-active ligands comprising an aminoalcohol or a dialkanolamine, and an anion having an oxidation state.
Filed: 5/17/2017
Application Number: US15597474A
Tech ID: SD 14221.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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