| Title |
Coffee-derived activated carbon from second biowaste for supercapacitor applications |
| ID_Doc |
29878 |
| Authors |
Adan-Mas, A; Alcaraz, L; Arévalo-Cid, P; López-Gómez, FA; Montemor, F |
| Title |
Coffee-derived activated carbon from second biowaste for supercapacitor applications |
| Year |
2021 |
| Published |
|
| DOI |
10.1016/j.wasman.2020.11.043 |
| Abstract |
The electrochemical energy storage performance of activated carbons (ACs) obtained from coffee-derived biowastes was assessed. ACs were obtained from spent coffee ground second waste, after polyphenol extraction, by means of a hydrothermal process followed by physical or chemical activation. The resulting materials exhibited microporous structures with a total specific area between 585 and 2330 m(2).g(-1). Scanning electron microscopy (SEM) revealed a highly porous microstructure in the case of the chemically activated carbons, while physical activation led to a cracked micro-sized morphology. The electrochemical properties of the materials for supercapacitor applications were investigated in 1 M Na2SO4. After chemical activation, the coffee-derived material displayed a capacitance of 84 F.g(-1) at 1 A.g(-1) in a 1.9 V voltage window, with 70% capacitance retention at 10 A.g(-1) and 85% retention after 5000 cycles of continuous charge-discharge. This work demonstrates how coffee secondary biowaste can be conveniently activated to perform as electrochemical energy storage material, contributing to its revalorization and reinsertion in a circular economy. (C) 2020 Elsevier Ltd. All rights reserved. |
| Author Keywords |
Activated carbon; Biowaste; Supercapacitors; Electrochemical energy storage |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000604341800001 |
| WoS Category |
Engineering, Environmental; Environmental Sciences |
| Research Area |
Engineering; Environmental Sciences & Ecology |
| PDF |
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