Bioinspired Sustainable Sheetlike Porous Carbon Derived from Cassia fistula Flower Petal as an Electrode for High-Performance Supercapacitors

Abstract

Herein, we report the synthesis of porous carbon material derived from the renewable source of Cassia fistula flower petals by a single-step direct-carbonization process. The sheetlike porous carbon (CFSPC) derived from C. fistula flower petals displays an uneven sheetlike morphology, hierarchical porous structure, and a high specific surface area of 556 m2 g–1. It exhibits a high specific capacitance of 324 F g–1 at the current density of 1 A g–1 and long cyclic stability of 95.3% with nearly 100% Coulombic efficiency over around 10 000 charge–discharge cycles in a two-electrode configuration. CFSPC also delivers a maximum specific energy of over 48.2 Wh kg–1 and a specific power of 687 W kg–1. These electrochemical performance results demonstrate that the as-synthesized sheetlike porous carbon derived from readily available greener resources like C. fistula flower petals may serve as promising electrodes for energy storage.

Higher Alcohol and Oxygenate Synthesis from Synthesis Gas and Ethanol over Supported K-(Co)MoS2 Catalysts: Effect of Novel Ni-Containing Carbon Nanofiber Supports Formed as Byproducts from Methane Decomposition

“…The type of carrier employed profoundly affects the physical and chemical characteristics, activity, and selectivity of the prepared catalysts in most catalytic reactions. Catalysts supported on metal oxides (silica, alumina, magnesia, and zirconia) have a lower catalytic performance than those supported on carbon materials. − This can be clarified through the active phase-support interaction; in contrast to metal oxides, the interaction of the active phase with carbon materials is weak. Our research team has put a great deal of effort into examining how novel activated carbon supports affect the (K)­CoMoS active phase for HAS from syngas − and ethanol, , taking into our consideration the attractive characteristics of activated carbons, such as the resistance to basic and acidic condition, porosity, and extremely stability under high pressure and temperatures.…”

Polypyrrole-coated copper@graphene core-shell nanoparticles for supercapacitor application

“…As the proportion of these renewable energy sources increases, how to use green energy and balance and stabilize power generation has become a major challenge at present. In the other words, power generation needs the cooperation of energy storage system to create a perfect power supply system [1,[7][8][9][10][11][12]. Because of the large-scale use of renewable energy, it is increasingly important to use energy more efficiently through energy storage technology.…”

Inherent Heteroatom-enriched Amorphous Carbon as High-performance Electrode for Sodium-ion Battery and Sodium-ion Ultracapacitor

“…In comparison with other precursors, carbon generated from biomass has a distinct feature of being green and sustainable. 23 To increase the specific capacitance of the carbon materials, techniques such as chemical activation and heteroatom doping are employed. The chemical activation using KOH, ZnCl 2 , or phosphoric acid helps in achieving the porous matrix that can lead to increased charge storage.…”

“…The carbon generated from each biomass is unique, and hence the resulted carbon is also unique, that is, the surface area, type, and the amount of heteroatoms in the generated carbon are different and result in different battery and supercapacitor performances. In comparison with other precursors, carbon generated from biomass has a distinct feature of being green and sustainable …”