Associative pyridinium electrolytes for air-tolerant redox flow batteries.

ABSTRACT: Pyridinium electrolytes are promising candidates for flow-battery-based energy storage^1-4. However, the mechanisms underlying both their charge-discharge processes and overall cycling stability remain poorly understood. Here we probe the redox behaviour of pyridinium electrolytes under representative flow battery conditions, offering insights into air tolerance of batteries containing these electrolytes while providing a universal physico-chemical descriptor of their reversibility. Leveraging a synthetic library of extended bispyridinium compounds, we track their performance over a wide range of potentials and identify the singlet-triplet free energy gap as a descriptor that successfully predicts the onset of previously unidentified capacity fade mechanisms. Using coupled operan

SUBMITTER: Carrington ME 

PROVIDER: S-EPMC10686829 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature