Abstract
Understanding the physical and chemical processes occurring in concentrated electrolyte solutions is required to achieve redox flow batteries with high energy density. Highly concentrated electrolyte solutions are often studied in which collective crowded interactions between molecules and ions become predominant. Herein, experimental and computational methods were used to examine nonaqueous electrolyte solutions in two different states of charge as a function of redoxmer concentration. As the latter increases and the ionic association strengthens, the electric conductivity passes through a maximum and the solution increasingly gels, which is seen through a rapid non-linear increase in viscosity. We establish that the structural rigidity of ionic networks is closely connected with this loss of fluidity and show that charging generally yields softer ionic assemblies with weaker attractive forces and improved dynamical properties.
| Original language | English |
|---|---|
| Pages (from-to) | 4243-4254 |
| Number of pages | 12 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 25 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jan 3 2023 |
Bibliographical note
Funding Information:The research was financially supported by the Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory (“Argonne”). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in the said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. This manuscript is dedicated in memoriam of Professor Susan A. Odom, whose unending curiosity for fundamental scientific discovery and tackling challenges continues to inspire us all.
Funding Information:
The research was financially supported by the Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory (''Argonne''). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in the said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. This manuscript is dedicated in memoriam of Professor Susan A. Odom, whose unending curiosity for fundamental scientific discovery and tackling challenges continues to inspire us all.
Publisher Copyright:
© the Owner Societies 2023.
ASJC Scopus subject areas
- Physics and Astronomy (all)
- Physical and Theoretical Chemistry