2‐Methoxyhydroquinone from Vanillin for Aqueous Redox‐Flow Batteries

Werner Schlemmer, Philipp Nothdurft, Alina Petzold, Philipp Frühwirt, Max Schmallegger, Georg Gescheidt-Demner, Roland Fischer, Stefan Freunberger, Wolfgang Kern, Stefan Spirk*

*Corresponding author for this work

Research output: Contribution to journalArticle


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.
Original languageEnglish
Pages (from-to)22943-22946
Number of pages4
JournalAngewandte Chemie / International Edition
Issue number51
Early online dateOct 2020
Publication statusPublished - 14 Dec 2020


  • Quinone
  • Vanillin
  • Lignin
  • Redox flow
  • Energy storage
  • Radical
  • lignin
  • redox-flow batteries
  • vanillin
  • quinone

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis


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