Identifying and preventing degradation in flavin mononucleotide-based redox flow batteries via NMR and EPR spectroscopy.

ABSTRACT: While aqueous organic redox flow batteries (RFBs) represent potential solutions to large-scale grid storage, their electrolytes suffer from short lifetimes due to rapid degradation. We show how an understanding of these degradation processes can be used to dramatically improve performance, as illustrated here via a detailed study of the redox-active biomolecule, flavin mononucleotide (FMN), a molecule readily derived from vitamin B2. Via in-situ nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) we identify FMN hydrolysis products and show that these give rise to the additional plateau seen during charging of an FMN-cyanoferrate battery. The redox reactions of the hydrolysis product are not reversible, but we demonstrate that capacity is still retained even after su

SUBMITTER: Hey D 

PROVIDER: S-EPMC10457286 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature