| Autor: |
Scarcello A; Surface Nanoscience Group, Department of Physics, University of Calabria, 87036 Rende, Italy.; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy., Alessandro F; Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), Via P. Bucci 17/C, 87036 Rende, Italy., Cruz Salazar Y; Surface Nanoscience Group, Department of Physics, University of Calabria, 87036 Rende, Italy.; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy., Arias Polanco M; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy.; Laboratorio de Nanotecnología, Area de Ciencias Básicas y Ambientales, Instituto Tecnológico de Santo Domingo, Av. Los Próceres, Santo Domingo 10602, Dominican Republic., Vacacela Gomez C; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy.; INFN-Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Tene T; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy.; Department of Chemistry, Universidad Tecnica Particular de Loja, Loja 110160, Ecuador., Guevara M; Faculty of Mechanical Engineering, Escuela Superior Politécnica de Chimborazo (ESPOCH), Riobamba 060155, Ecuador., Bellucci S; INFN-Laboratori Nazionali di Frascati, 00044 Frascati, Italy., Straface S; Department of Environmental Engineering (DIAm), University of Calabria, Via P. Bucci, Cubo 42B, 87036 Rende, Italy., Caputi LS; Surface Nanoscience Group, Department of Physics, University of Calabria, 87036 Rende, Italy.; UNICARIBE Research Center, University of Calabria, 87036 Rende, Italy. |
| Abstrakt: |
The development of efficient energy storage systems is critical in the transition towards sustainable energy solutions. In this context, the present work investigates the viability of using orange juice, as a promising and sustainable precursor, for the synthesis of activated carbon electrodes for supercapacitor technologies. Through the carbonization-activation process and controlling the preparation parameters (KOH ratio and activation time), we have tailored the specific surface area (SSA) and pore size distribution (PSD) of the resulting carbon materials-crucial parameters that support supercapacitive performance. Several spectroscopic, morphological, and electrochemical techniques are used to characterize the obtained carbon materials. In particular, our optimization efforts revealed that a 5:1 KOH ratio with an activation time up to 120 min produced the highest SSA of about 2203 m 2 /g. Employing these optimal conditions, we fabricated symmetric coin cell supercapacitors using Na 2 SO 4 as the electrolyte, which exhibited interesting specific capacitance (~56 F/g). Durability testing over 5000 cycles sustained the durability of the as-made activated carbon electrodes, suggesting an excellent retention of specific capacitance. This study not only advances the field of energy storage by introducing a renewable material for electrode fabrication but also contributes to the broader goal of waste reduction through the repurposing of food byproducts. |
