A Newly Synthesized Copper Redox Couple Electrolyte with Activated Carbon Electrode from Samanea saman Wood Tissue for Flexible Supercapacitor

Abstract

The search for new superior electrode materials and modifications of electrolyte portions is one of the most significant responsibilities in developing supercapacitors. To enhance the cell voltage and efficiency of supercapacitors, we propose using activated Samanea saman wood shell carbon as an electrode and a new unique copper metal complex as an electrolyte for the first time. We synthesized a sheet-like structure of activated Samanea saman wood shell carbon using a pyrolysis process and synthesized a new novel copper metal complex bound with the H 2 SO 4 electrolyte in this combination fabrication for a supercapacitor (RESC). The redox couple aided SC exhibits an outstanding electrochemical performance that is attributed to the maximum specific capacitance value of 599 F g −1 and long lifespan of 98.9% specific capacitance after 8500 charge− discharge cycles in the half (three-electrode)-cell configuration. The activated carbon as cathode, graphite as anode, and gel formation of the copper metal complex bound with H 2 SO 4 electrolyte were used to construct the (RESC) supercapacitor device. This RESC device achieved 70.7 W h kg −1 energy density and power density of 534.75 W kg −1 . The combination of activated carbon electrode material and copper metal complex mediator provided the way for the development of a more efficient material for supercapacitors (SCs).

Selective Proton-Conducting Polystyrene-Based Polyelectrolyte Membrane Containing Bi2O3 Nanoparticles and Graphitic Carbon Nitride Nanosheets for Fuel Cells and Supercapacitors

“…Along with the remarkable synergy produced by a hybrid interface, the qualities of hybrid materials are achieved via the total of individual contributions of each of their constituent parts. 22,23 In supercapacitor electrolytes are classified into three types: 24 (i) liquid electrolytes (organic, aqueous, redox), (ii) solid/semi solid-state electrolytes (dry/gel polymer, inorganic), and (iii) redox active electrolytes (aqueous, ionic liquid, organic, gel polymer). In terms of solid electrolytes, poly(vinyl alcohol) (PVA) is the most often utilized gel electrolyte for stretchable supercapacitors, with modest strain capability.…”

Energy Enhancement of a Nickel–Cobalt-Mixed Metallic Metal–Organic Framework Electrode and a Potassium Iodide Redox Mediator Bound with an Aqueous Electrolyte for High-Performance Redox-Aided Asymmetric Supercapacitors

“…Most tasks in supercapacitor applications may now be made more energy efficient if two methods for increasing the cell voltage are used . (i) Electrode material development with huge capacitance, such as metal oxide materials and carbon-based materials. − (ii) Redox substance bound with aqueous or alkali electrolytes is another way of enhancing the capacitance performance. Redox mediator electrolytes enhance the redox potential and fast ion transport between negative electrodes and positive electrodes.…”