Electrochemical and spectroscopic characterisation of organic molecules with high positive redox potentials for energy storage in aqueous flow cells
File(s)
Published version
Author(s)
Cannon, Christopher G
Klusener, Peter AA
Brandon, Nigel P
Kucernak, Anthony RJ
Type
Journal Article
Abstract
We show that a number of ubiquitous organic molecules used as redox mediators and chemically sensing species can be used as positive couples in electrochemical energy storage. Air and acid stable organic molecules were tested in aqueous acid electrolytes and employed as the positive electrolyte in H2–organic electrochemical cells. The dissolved organic species were characterised in-operando using UV-vis spectroscopy. N,N,N′,N′-tetramethylbenzidine was found to be a stable and reversible redox organic molecule, with a 2 e− molecule−1 capacity and a 0.83 V cell potential. N-Oxyl species were also tested in purely aqueous acidic flow battery electrolytes. A H2–violuric acid cell produced a reversible potential of 1.16 V and demonstrated promising redox flow cell cycling performance.
Date Issued
2024-10-01
Date Acceptance
2024-08-27
Citation
Energy Advances, 2024, 3 (10), pp.2587-2596
ISSN
2753-1457
Publisher
The Royal Society of Chemistry
Start Page
2587
End Page
2596
Journal / Book Title
Energy Advances
Volume
3
Issue
10
Copyright Statement
© 2024 The Author(s). Published by the Royal Society of Chemistry Open Access Article This article is licensed under a Creative Commons Attribution 3.0 Unported Licence
License URL
Subjects
BATTERY
BENZOQUINONE
Chemistry
Chemistry, Physical
CHLORPROMAZINE
ELECTROLYTES
Energy & Fuels
IONIZATION
KINETICS
Materials Science
Materials Science, Multidisciplinary
N,N,N,N-TETRAMETHYLBENZIDINE
PATHWAYS
Physical Sciences
RADICAL CATION
Science & Technology
SULFOXIDE
Technology
Publication Status
Published
Date Publish Online
2024-09-11