Details
| Original language | English |
|---|---|
| Pages (from-to) | 38097-38106 |
| Number of pages | 10 |
| Journal | RSC Advances |
| Volume | 10 |
| Issue number | 62 |
| Publication status | Published - 15 Oct 2020 |
Abstract
Sustainable agroindustry has presented many challenges related to waste management. Most of its residues are lignocellulosic biomass materials with great application potential due to their chemical composition, hence the use of biomass-derived carbon materials in energy storage has received growing interest in recent years. In this work, highly micro-porous carbonaceous materials using the endocarp of the coffee fruit or coffee husk (CH) as precursor are obtained. Specifically, three different activating agents (KOH, K2CO3, and steam) to derive activated carbons (ACs) with good capacitive properties are tested. The properties of ACs such as surface chemistry, texture, crystal graphite size, and order in the carbonaceous structure are assessed and compared. The capacitive behavior inherent to the activation routes is also characterized by means of Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS). The obtained specific capacitance values range from 106 to 138 F g-1 for a discharge current of 0.5 A g-1. These results nominate coffee husk as a good precursor of carbonaceous materials suitable for energy storage.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
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In: RSC Advances, Vol. 10, No. 62, 15.10.2020, p. 38097-38106.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Capacitive behavior of activated carbons obtained from coffee husk
AU - Ramirez, Nathalia
AU - Sardella, Fabiana
AU - Deiana, Cristina
AU - Schlosser, Anja
AU - Müller, Dennis
AU - Kißling, Patrick A.
AU - Klepzig, Lars F.
AU - Bigall, Nadja C.
N1 - Funding Information: This work was carried out using infrastructure of the Institute of Physical Chemistry and Electrochemistry (LUH/Germany) and Institute of Chemical Engineering (UNSJ/Argentina). The authors acknowledge the nancial support from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Program (grant agreement no. 714429). In addition, N. C. B. and P. A. K. thank the German Research Foundation (Deutsche Forschungsgemeinscha, DFG) research grant BI 1708/4-1 as well as BI 1708/5-1 for funding. L. F. K. and N. C. B. funded by the Deutsche For-schungsgemeinscha (DFG, German Research Foundation) under Germany's Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, project ID 390833453). Furthermore, N. R. is grateful for partial funding from the Argentine Institutions CONICET (Consejo Nacional de Inves-tigaciones Cientícas y Técnicas) and Universidad Nacional de San Juan (UNSJ). The authors also thank Prof. Caro and Prof. Feldhoff for access to FTIR spectrometer and X-ray diffractometer. Thank to, I. Strauss at PCI/LUH and M. Schulz at ACI/LUH for sample analysis or training.
PY - 2020/10/15
Y1 - 2020/10/15
N2 - Sustainable agroindustry has presented many challenges related to waste management. Most of its residues are lignocellulosic biomass materials with great application potential due to their chemical composition, hence the use of biomass-derived carbon materials in energy storage has received growing interest in recent years. In this work, highly micro-porous carbonaceous materials using the endocarp of the coffee fruit or coffee husk (CH) as precursor are obtained. Specifically, three different activating agents (KOH, K2CO3, and steam) to derive activated carbons (ACs) with good capacitive properties are tested. The properties of ACs such as surface chemistry, texture, crystal graphite size, and order in the carbonaceous structure are assessed and compared. The capacitive behavior inherent to the activation routes is also characterized by means of Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS). The obtained specific capacitance values range from 106 to 138 F g-1 for a discharge current of 0.5 A g-1. These results nominate coffee husk as a good precursor of carbonaceous materials suitable for energy storage.
AB - Sustainable agroindustry has presented many challenges related to waste management. Most of its residues are lignocellulosic biomass materials with great application potential due to their chemical composition, hence the use of biomass-derived carbon materials in energy storage has received growing interest in recent years. In this work, highly micro-porous carbonaceous materials using the endocarp of the coffee fruit or coffee husk (CH) as precursor are obtained. Specifically, three different activating agents (KOH, K2CO3, and steam) to derive activated carbons (ACs) with good capacitive properties are tested. The properties of ACs such as surface chemistry, texture, crystal graphite size, and order in the carbonaceous structure are assessed and compared. The capacitive behavior inherent to the activation routes is also characterized by means of Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS). The obtained specific capacitance values range from 106 to 138 F g-1 for a discharge current of 0.5 A g-1. These results nominate coffee husk as a good precursor of carbonaceous materials suitable for energy storage.
UR - http://www.scopus.com/inward/record.url?scp=85094191711&partnerID=8YFLogxK
U2 - 10.1039/d0ra06206e
DO - 10.1039/d0ra06206e
M3 - Article
AN - SCOPUS:85094191711
VL - 10
SP - 38097
EP - 38106
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 62
ER -