Erman Taer, - and Rika Taslim, - and Apriwandi, - (2022) Biomass-based Self-single-oxygen Heteroatom-doped Hierarchical Porous Carbon Nanosheets for High-performance Symmetrical Supercapacitors. ChemNanoMat, 8. ISSN 2199-692X

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Abstract

Biomass-based porous carbon holds potential for improving the electrochemical performance of supercapaci- tors due to its high surface area, 2D nanostructure, 3D hierarchical pores, and self-multi-doped-heteroatoms. Here, 2D and 3D porous carbon nanostructures, as well as self- single-doped oxygen were successfully obtained from Mor- inga oleifera leaves waste by a facile, time-saving, and cost- effective strategy. The dried powder precursor was chemically provided with 0.5 m/L H3PO4 and ZnCl2 solutions at high- temperature pyrolysis. Furthermore, electrode material was designed with sleekly slim binder-free solid coins. The obtained porous carbon has a 2D nanosheet-nanofiber and rich-3D hierarchical porous structure with significantly highsub-ultra micropores. Meanwhile, 17.62% self-doped oxygen was found to provide an extra pseudocapacitance effect. The optimum carbon possessed high electrochemical properties at a specific capacitance of 201 Fg 1 in 1 M H2SO4 electrolyte. Furthermore, the maximum energy density was obtained at 25 Whkg 1 , at optimum power of 122 Wkg 1 in current density of 1.0 Ag 1 . The electrochemical behavior of these samples was also reviewed through a 1 M Na2SO4 neutral aqueous electrolyte. Therefore, the great potential of Moringa oleifera leaves was observed as a porous carbon source with good material properties for enhancing the performance of electrochemical energy storage devices.

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