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Title Renewable Carbon Materials as Electrodes for High-Performance Supercapacitors: From Marine Biowaste to High Specific Surface Area Porous Biocarbons
ID_Doc 14376
Authors Brandao, ATSC; State, S; Costa, R; Potorac, P; Vázquez, JA; Valcarcel, J; Silva, AF; Anicai, L; Enachescu, M; Pereira, CM
Title Renewable Carbon Materials as Electrodes for High-Performance Supercapacitors: From Marine Biowaste to High Specific Surface Area Porous Biocarbons
Year 2023
Published Acs Omega, 8, 21
Abstract Waste, in particular, biowaste, can be a valuable sourceof novelcarbon materials. Renewable carbon materials, such as biomass-derivedcarbons, have gained significant attention recently as potential electrodematerials for various electrochemical devices, including batteriesand supercapacitors. The importance of renewable carbon materialsas electrodes can be attributed to their sustainability, low cost,high purity, high surface area, and tailored properties. Fish wasterecovered from the fish processing industry can be used for energyapplications and prioritizing the circular economy principles. Herein,a method is proposed to prepare a high surface area biocarbon fromglycogen extracted from mussel cooking wastewater. The biocarbon materialswere characterized using a Brunauer-Emmett-Teller surfacearea analyzer to determine the specific surface area and pore sizeand by scanning electron microscopy coupled with energy-dispersiveX-ray analysis, Raman analysis, attenuated total reflectance Fouriertransform infrared spectroscopy, X-ray diffraction, X-ray photoelectronspectroscopy, and transmission electron microscopy. The electrochemicalcharacterization was performed using a three-electrode system, utilizinga choline chloride-based deep eutectic solvent (DES) as an eco-friendlyand sustainable electrolyte. Optimal time and temperature allowedthe preparation of glycogen-based carbon materials, with a specificsurface area of 1526 m(2) g(-1), a pore volumeof 0.38 cm(3) g(-1), and an associated specificcapacitance of 657 F g(-1) at a current density of1 A g(-1), at 30 degrees C. The optimal material wasscaled up to a two-electrode supercapacitor using a DES-based solid-stateelectrolyte (SSE@DES). This prototype delivered a maximum capacitanceof 703 F g(-1) at a 1 A g(-1) of currentdensity, showing 75% capacitance retention over 1000 cycles, deliveringthe highest energy density of 0.335 W h kg(-1) andpower density of 1341 W kg(-1). Marine waste can bea sustainable source for producing nanoporous carbon materials tobe incorporated as electrode materials in energy storage devices.
PDF https://pubs.acs.org/doi/pdf/10.1021/acsomega.3c00816

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