Liquid Redoxmers for Nonaqueous Redox Flow Batteries

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.