Tannin-Based Nanoscale Carbon Spherogels as Electrodes for Electrochemical Applications

ACS Appl Nano Mater. 2021 Dec 24;4(12):14115-14125. doi: 10.1021/acsanm.1c03431. Epub 2021 Dec 2.

ABSTRACT

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.

PMID:34977479 | PMC:PMC8713360 | DOI:10.1021/acsanm.1c03431

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