Title: Electrochemical implications of modulating the solvation shell around redox active organic species in aqueous organic redox flow batteries

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Center for Solar Energy and Energy Storage, Washington University in St. Louis, St. Louis, MO 63130,, Department of Energy, Environmental &, Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130,, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO 63130

Significance The development of cost-effective batteries for long-duration grid scale energy storage will be accelerated using frameworks to rapidly screen and select battery components. Herein, we show that the solvent reorganization energy calculated from the Born equation (with reference to an electrolyte’s composition) is predictive of the electrolytes’ device level performance. This descriptor was found to correlate with key transport and kinetic properties over a range of electrolyte compositions and pH values, succinctly capturing the multicomponent interactions between the electrolyte salts and solvent. This enables the initial high-throughput screening of electrolyte candidates with minimal experimentation. Applied to aqueous redox flow batteries employing organic redox active species, we predict high-performance electrolyte compositions, enabling significantly enhanced device performance.

Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AR0000768
OSTI ID:
1814521
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 34 Vol. 118; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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