Journal
JOURNAL OF ENERGY STORAGE
Volume 74, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2023.109326
Keywords
Biomass; Mesoporous structure; Honeycomb structure; Supercapacitor; Capacitance performance; Electrolyte
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Converting biomass garbage into porous carbon-based electrode materials for supercapacitors is important in the current energy-friendly society. This study developed an efficient three-dimensional honeycomb porous carbon electrode material using sunflower plate and rice husk as precursors. The material exhibited high capacitance, abundant porosity, and excellent performance in various media, showcasing the great potential of twin substance derived electrode materials for high performance supercapacitors.
Biomass garbage convert into highly efficient porous carbon-based electrode materials for supercapacitors is of great significance to the current energy-friendly society. Herein, an efficient electrode material of threedimensional honeycomb porous carbons is developed for supercapacitor by employing sunflower plate and rice husk as a precursor. Particularly, SiO2-rich rice husk plays a crucial role in the formation of porous structure and three-dimensional morphology. Benefiting from the high surface area and more defective carbon nanoframework, high contents of nitrogen and oxygen dopants, abundant porosity, the resultant optimal RSC-1-1 exhibits a specific capacitance of 448 F/g at 0.5 A/g in 6 M KOH. Furthermore, the capacitive performance of RSC-1-1 in acidic and neutral media are also analysed systematically. In addition, the energy densities of RSC-1-1 assembled supercapacitors 6 M KOH, 1 M Na2SO4 and PVA/KOH gels are 12.15 Wh/kg, 35.55 Wh/kg, and 29.06 Wh/kg, respectively. This study demonstrates the great potential of twin substance derived electrode materials in constructing high performance supercapacitor.
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