Premium
2‐Methoxyhydroquinone from Vanillin for Aqueous Redox‐Flow Batteries
Author(s) -
Schlemmer Werner,
Nothdurft Philipp,
Petzold Alina,
Riess Gisbert,
Frühwirt Philipp,
Schmallegger Max,
GescheidtDemner Georg,
Fischer Roland,
Freunberger Stefan A.,
Kern Wolfgang,
Spirk Stefan
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202008253
Subject(s) - redox , chemistry , hydroquinone , electrochemistry , radical , semiquinone , aqueous solution , electrolyte , quinone , flow battery , photochemistry , combinatorial chemistry , inorganic chemistry , organic chemistry , electrode
We show the synthesis of a redox‐active quinone, 2‐methoxy‐1,4‐hydroquinone (MHQ), from a bio‐based feedstock and its suitability as electrolyte in aqueous redox flow batteries. We identified semiquinone intermediates at insufficiently low pH and quinoid radicals as responsible for decomposition of MHQ under electrochemical conditions. Both can be avoided and/or stabilized, respectively, using H 3 PO 4 electrolyte, allowing for reversible cycling in a redox flow battery for hundreds of cycles.