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Liquid Redoxmers for Nonaqueous Redox Flow Batteries.

Lily A Robertson1,2, Mohammad Afsar Uddin1,2,3,4,5, Ilya A Shkrob1,2

  • 1Joint Center of Energy Storage Research (JCESR), Argonne National Laboratory, Lemont, Illinois, 60439, United States.

Chemsuschem
|March 21, 2023
PubMed
Summary

Researchers are developing liquid redoxmers for nonaqueous redox flow batteries (NRFBs). This strategy enhances energy density by maximizing redoxmer concentration with minimal solvents, improving electricity storage capacity.

Keywords:
PEGylationhigh energy densityliquid redoxmersnonaqueous redox flow batteriesviscosity

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Redoxmers are organic molecules crucial for energy storage in nonaqueous redox flow batteries (NRFBs).
  • Enhancing redoxmer solubility is key to increasing the energy density of NRFBs.
  • High redoxmer concentration directly correlates with increased electricity storage capacity per unit volume.

Purpose of the Study:

  • To discuss recent advancements in liquid redoxmers for NRFBs.
  • To explore strategies for molecular engineering of redoxmers towards liquid forms.
  • To highlight the potential of liquid redoxmers in maximizing energy density.

Main Methods:

  • Review of recent examples of liquid redoxmer development.
  • Analysis of molecular engineering strategies for achieving liquid redoxmers.
  • Discussion of the role of supporting solvents in maintaining fluidity at high concentrations.

Main Results:

  • Liquid redoxmers represent an extreme scenario for maximizing redoxmer concentration.
  • This approach minimizes the need for supporting solvents while maintaining fluidity.
  • Recent examples demonstrate the feasibility and potential of liquid redoxmer strategies.

Conclusions:

  • Molecular engineering towards liquid redoxmers is a promising strategy for NRFBs.
  • This approach significantly enhances energy density by increasing effective redoxmer concentration.
  • Further development of liquid redoxmers could revolutionize electrochemical energy storage.