Redox active colloidal particles for flow batteries
AssigneeThe Board of Trustees of the University of Illinois
InventorsJeffrey S. Moore, Joaquin Rodriguez-Lopez, Nagarjuna Gavvalapalli, Elena Montoto, Jingshu Hui
Life of this patent
Estimating the term…
Abstract
The invention provides a redox flow battery comprising a microporous or nanoporous size-exclusion membrane, wherein one cell of the battery contains a redox-active colloidal particle dispersed in a non-aqueous solvent. The redox flow battery provides enhanced ionic conductivity across the electrolyte separator and reduced redox-active species crossover, thereby improving the performance and enabling widespread utilization of the battery. Redox active colloidal particles (RACs) were prepared, analyzed, and were found to be highly effective redox species for use in redox flow batteries.
Claims13
A redox flow battery comprising a first and a second chamber separated by a microporous or nanoporous size-exclusion membrane, wherein the first and second chambers each contain a non-aqueous solvent, a charge balancing ion, and an electrode;
- and
- wherein the first chamber contains one or more colloidal particles suspended in the non-aqueous solvent, wherein the colloidal particles are redox-active viologen-based polymer particles, and
- wherein at least one of colloidal particles comprises a first polymer chain crosslinked with a second polymer chain.
A redox flow battery comprising a first and a second chamber separated by a microporous or nanoporous size-exclusion membrane, wherein the first and second chambers each contain a non-aqueous solvent, a charge balancing ion, and an electrode;
- wherein the first chamber contains one or more colloidal particles suspended in the non-aqueous solvent, wherein the colloidal particles are redox-active viologen-based polymer particles, redox-active ferrocene-based polymer particles, or a combination thereof;
- and
- wherein at least one of the colloidal particles comprises a redox-active viologen-based polymer particle comprising Formula I:
- wherein
- R is
- and
- m, n, x, and y are each independently positive integers that provides sufficient cross-linking within the particle such that particle has a diameter of about 10 nm to about 100 μm.
Dependencies are inferred from the claim text.