Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors
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 subse...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-01-01
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| Series: | Materials Science for Energy Technologies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S258929912100001X |
| _version_ | 1818997631381143552 |
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| author | Philipp Konnerth Dennis Jung Jan W. Straten Klaus Raffelt Andrea Kruse |
| author_facet | Philipp Konnerth Dennis Jung Jan W. Straten Klaus Raffelt Andrea Kruse |
| author_sort | Philipp Konnerth |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-20T21:48:42Z |
| format | Article |
| id | doaj.art-43eef193426d4c7fb9235c9f82fe2855 |
| institution | Directory Open Access Journal |
| issn | 2589-2991 |
| language | English |
| last_indexed | 2024-12-20T21:48:42Z |
| publishDate | 2021-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Materials Science for Energy Technologies |
| spelling | doaj.art-43eef193426d4c7fb9235c9f82fe28552022-12-21T19:25:36ZengKeAi Communications Co., Ltd.Materials Science for Energy Technologies2589-29912021-01-0146980Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitorsPhilipp Konnerth0Dennis Jung1Jan W. Straten2Klaus Raffelt3Andrea Kruse4University of Hohenheim, Institute of Agricultural Engineering, Department of Conversion Technologies of Biobased Resources, Garbenstr. 9, 70599 Stuttgart, Germany; Corresponding author.University of Hohenheim, Institute of Agricultural Engineering, Department of Conversion Technologies of Biobased Resources, Garbenstr. 9, 70599 Stuttgart, GermanyUniversity of Hohenheim, Institute of Agricultural Engineering, Department of Conversion Technologies of Biobased Resources, Garbenstr. 9, 70599 Stuttgart, GermanyKarlsruhe Institute of Technology (KIT), Institute of Catalysis Research and Technology (IKFT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyUniversity of Hohenheim, Institute of Agricultural Engineering, Department of Conversion Technologies of Biobased Resources, Garbenstr. 9, 70599 Stuttgart, GermanyThe 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.http://www.sciencedirect.com/science/article/pii/S258929912100001XBioeconomyBiomassBiobased productsGreen electrodesEDLCs |
| spellingShingle | Philipp Konnerth Dennis Jung Jan W. Straten Klaus Raffelt Andrea Kruse Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors Materials Science for Energy Technologies Bioeconomy Biomass Biobased products Green electrodes EDLCs |
| title | Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| title_full | Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| title_fullStr | Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| title_full_unstemmed | Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| title_short | Metal oxide-doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| title_sort | metal oxide doped activated carbons from bakery waste and coffee grounds for application in supercapacitors |
| topic | Bioeconomy Biomass Biobased products Green electrodes EDLCs |
| url | http://www.sciencedirect.com/science/article/pii/S258929912100001X |
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