Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 51, Pages 22943-22946Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202008253
Keywords
lignin; quinone; redox-flow batteries; vanillin
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Funding
- Austrian Research Promotion Agency (FFG) [860429]
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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.
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