Role of porosity and diffusion coefficient in porous electrode used in supercapacitors – Correlating theoretical and experimental studies

Porous electrodes are fast emerging as essential components for next-generation supercapacitors. Using porous structures of Co3O4, Mn3O4, α-Fe2O3, and carbon, their advantages over the solid counterpart is unequivocally established. The improved performance in architecture linked to enhanced active specific surface direct channels leading electrolyte interaction with redox-active sites. A theoretical model utilizing Fick's law proposed, that can consistently explain experimental data. exhibit ∼50%–80% increment capacitance, along high rate capabilities excellent cycling stability due higher diffusion coefficients.