Tannin-Based Nanoscale Carbon Spherogels as Electrodes for Electrochemical Applications

Ann Kathrin Koopmann, Jorge Torres-Rodríguez, Miralem Salihovic, Juergen Schoiber, Maurizio Musso, Gerhard Fritz-Popovski, Nicola Huesing, Michael S. Elsaesser

Research output: Contribution to journalArticleResearchpeer-review


A promising route to monolithic, hollow sphere carbon assemblies based on sustainable precursors with a tailored nanostructure is presented. These carbon assemblies, recently termed carbon spherogels, are generated via a polystyrene sphere template-based sol-gel process of mimosa tannin and biomass-derived 5-(hydroxymethyl)furfural. By completely replacing petroleum-based precursors (especially toxic formaldehyde) highly porous, nanoscale carbon monoliths are obtained, which are investigated as state-of-the-art, sustainable electrode materials for energy storage. This study defines the required synthesis parameters, in particular the highly acidic initial pH and a tannin/water ratio of at least 0.05 or lower, for a successful and homogeneous generation of these biobased carbon spherogels.
Original languageEnglish
Pages (from-to)14115-14125
Number of pages11
JournalACS Applied Nano Materials
Issue number12
Publication statusPublished - 2 Dec 2021

Bibliographical note

Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.


  • aerogels
  • electrochemistry
  • hollow carbon spheres
  • nanoporous materials
  • sustainable carbons
  • tannin

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