| 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.times. 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. |
| Filed: 5/17/2017 |
| Application Number: 15/597474 |
| 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. |
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