Bio-Based Carbon Materials from Potato Waste as Electrode Materials in Supercapacitors
Viola Hoffmann,
Dennis Jung,
Muhammad Jamal Alhnidi,
Lukas Mackle and
Andrea Kruse
Additional contact information
Viola Hoffmann: Conversion Technologies of Biobased Resources, University of Hohenheim, Garbenstr. 9, 70599 Stuttgart, Germany
Dennis Jung: Conversion Technologies of Biobased Resources, University of Hohenheim, Garbenstr. 9, 70599 Stuttgart, Germany
Muhammad Jamal Alhnidi: Conversion Technologies of Biobased Resources, University of Hohenheim, Garbenstr. 9, 70599 Stuttgart, Germany
Lukas Mackle: Conversion Technologies of Biobased Resources, University of Hohenheim, Garbenstr. 9, 70599 Stuttgart, Germany
Andrea Kruse: Conversion Technologies of Biobased Resources, University of Hohenheim, Garbenstr. 9, 70599 Stuttgart, Germany
Energies, 2020, vol. 13, issue 9, 1-28
Abstract:
This study investigates the production of biobased carbon materials from potato waste and its application in energy storage systems such as supercapacitors. Three different categories of carbons were produced: hydrochar (HC) from hydrothermal carbonization (HTC) at three different temperatures (200 °C, 220 °C, 240 °C) and two different duration times (two hours and five hours), pyrolyzed hydrochar (PHC) obtained via pyrolysis of the HTC chars at 600 °C and 900 °C for two hours and pyrochar from the pyrolysis of biomass at 600 °C and 900 °C for two hours. The carbon samples were analysed regarding their physico-chemical properties such as elemental composition, specific surface area, bulk density and surface functionalities as well as their electrochemical characteristics such as electric conductivity and specific capacity via cyclic voltammetry. N- and O-enriched carbon materials with promising specific surface areas of up to 330 m 2 g −1 containing high shares of microporosity were produced. Electric conductivities of up to 203 S m −1 and specific capacities of up to 134 F g −1 were obtained. The presence of high contents of oxygen (4.9–13.5 wt.%) and nitrogen (3.4–4.0 wt.%) of PHCs is assumed to lead to considerable pseudocapacitive effects and favor the high specific capacities measured. These results lead to the conclusion that the potential of agricultural biomass can be exploited by using hydrothermal and thermochemical conversion technologies to create N- and O-rich carbon materials with tailored properties for the application in supercapacitors.
Keywords: bioeconomy; energy storage; supercapacitor; advanced carbon material; biobased carbon materials; potato waste (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)
Downloads: (external link)
https://www.mdpi.com/1996-1073/13/9/2406/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/9/2406/ (text/html)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:9:p:2406-:d:356752
Access Statistics for this article
Energies is currently edited by Ms. Agatha Cao
More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().