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Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors

Konnerth, Philipp; Jung, Dennis; Straten, Jan W.; Raffelt, Klaus; Kruse, Andrea

Abstract (englisch):
The functionalization of sustainable carbon materials and their application in energy storage systems
attract more and more relevancy. Bakery waste and spent coffee grounds were chosen as abundant
organic residues and found to be suitable starting materials for hydrothermal carbonization and a subsequent
chemical activation obtaining carbon contents of > 88%. In situ doping of the hydrochars during
carbonization has proven to be a successful method for insertion of Fe2O3-, Fe3O4- and MnO2-
Nanoparticles into the carbon matrix, supported by XRD analysis and SEM images. Chemical activation
with K2CO3 led to iron contents up to 18% of iron and around 8% of manganese, respectively, in the corresponding
activated carbon. Electrochemical characterization revealed overall higher specific capacitance
for activated carbons derived from spent coffee grounds, with a highest of 87F*g-1. In contrast,
the highest specific capacitance measured for activated carbons originated from bakery waste was
40,3F*g-1.

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Verlagsausgabe §
DOI: 10.5445/IR/1000129190
Veröffentlicht am 01.02.2021
Originalveröffentlichung
DOI: 10.1016/j.mset.2020.12.008
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2589-2991
KITopen-ID: 1000129190
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Materials science for energy technologies
Verlag Elsevier
Band 4
Seiten 69–80
Bemerkung zur Veröffentlichung Kooperation mit der UNi Hohenheim: Bioraffinerie-Farm
Schlagwörter Bioeconomy Biomass Biobased products Green electrodes EDLCs
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