Activated carbon electrode with promising specific capacitance based on potassium bromide redox additive electrolyte for supercapacitor application

In situ preparation of molybdenum-dioxide-incorporated carbonized silk fiber and its application in supercapacitors

“…By contrast, the GCD curves of the CSF-MoO 2 electrode generated using different applied current densities all show a nearly symmetrical triangular shape ( Figure 13D ), indicating excellent capacitive performance with a high degree of electrochemical reversibility ( Song et al, 2019 ). Furthermore, the discharge time of the CSF-MoO 2 electrode was much longer than that of the CSF electrode, revealing a significant improvement in the specific capacitance and energy storage of the electrode ( Maher et al, 2021 ). This enhancement was also supported by the calculated specific capacitance of both electrodes shown in Figure 13E , indicating that the CSF-MoO 2 electrodes have higher specific capacitances at various current densities compared with those of the CSF electrodes.…”

Electrochemical properties depending on heteroatom and surface property of various carbon sources/NiO composites as supercapacitor electrode

“…The tiny surface area available for electro‐absorption reactions is evident in the WN composite's flat shape. [ 8 ] The SEM images of the composites show that the MN composite has a porous morphology compared to the AN and WN composites. As a result, when a charge is supplied to the electrodes, ionic diffusion is made easier.…”

“…For smooth electro‐adsorption kinetics to occur, the pore size should typically not be in the same range as the size of the hydrated ions or smaller, only greater. [ 8 ] In comparison to the other composites, the pore size of the AN composite was the smallest at 2.05 nm. The large specific surface area accessible for ion adsorption and desorption is responsible for the specific capacitance of AN.…”

“…[ 3,7 ] The innumerable benefits of activated carbon derived from biomass include its high availability and environmental friendliness. [ 8 ] The choice of activated carbon for use in research projects depends on knowing the carbon precursor. The qualities of the activated carbon, such as its heteroatoms and textural aspects, are greatly influenced by the precursor.…”

Stacked vanadium pentoxide–zinc oxide interface for optically-chargeable supercapacitors

“…Many researchers have reported an increase in supercapacitor device capacitance in the past. 41,42 The reason for such behavior can be attributed to the activation of the material aer a certain number of cycles which is a commonly observed phenomenon for metal oxides. 43 As per a few studies, the removal of oxygen functional groups and improved access of ions to pores of active material aer a few cycles contributes to increased capacitance.…”