期刊
ENERGY
卷 260, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2022.125092
关键词
Olive tree pruning residue; Activated carbon; Symmetric solid-state supercapacitor
资金
- National University of the Center of the Province of Buenos Aires [03/E188]
- National Agency for Scientific and Technological Promotion (ANPCyT) through the Research Fund Scientific and Technological (FONCyT) [PICT 2019-03745]
- National University of San Juan [PDTS 3589/20]
This study presents the development of a symmetric solid-state supercapacitor using activated carbon from olive pruning waste. Chemically activated carbons with high surface area and developed pore structure showed superior electrochemical performance compared to physically activated carbons. By assembling three supercapacitors with chemically activated carbon and PVA-KOH hydrogel, excellent performance was achieved.
The scientific community is focusing on developing supercapacitors with high capacitance, power and energy from waste-derived electrode materials and low-toxic aqueous electrolytes that can provide an advance in energy storage as well as the care for the environment. This work presents the development of a symmetric solid-state supercapacitor with activated carbon from olive pruning. Activated carbons were synthesized by chemical and physical methods varying their conditions. The physicochemical characterization determined that chemically activated carbons provided the highest surface areas, greater than 2000 m2 g-1. The electrochemical performance of chemically activated carbons was superior to physically activated carbons due to the high surface area and the developed pore structure that promote capacitances of up to 410 F g(-1). Three symmetric solid-state supercapacitors with chemically activated carbon as electrode material and PVA-KOH hydrogel as electrolyte were assembled, and windows potential and drying time of the membrane were evaluated. An excellent per-formance supercapacitor was developed with electrode materials from olive pruning waste, which presented a capacitance of 1.15 F at 5 mA, a voltage of 1.2 V and equivalent series resistance of 1.42 omega. These results present a promising way to develop competitive energy storage devices using agroindustrial waste to produce electrode materials.
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