Surfactant-assisted hydrothermal synthesis of CoMn2O4 nanostructures for efficient supercapacitors

Zinc Manganite as an Efficient Battery-grade Material for Supercapattery Devices

“…While the oxidation and reduction peaks in the cyclic voltammograms exhibit a slight shift with increasing scan rate, this suggests a quasi-reversible reaction of the electrode materials. The quasi-reversible nature of the electrode materials is attributed to ohmic resistance and pronounced polarization in the electrolyte solution [19,22,53]. The specific capacity (Cs) values at various scan rates are determined from the CV curves using the following equation ( 1) [9,43,54],…”

“…At lower scan rates, there is sufficient time for electrolyte ions to permeate and for faradaic processes to occur, resulting in a higher specific capacity. However, at higher scan rates, insufficient time is available for the diffusion of electrolyte ions, leading to a lower specific capacity [53,55]. The redox reactions that occur at the electrode-electrolyte surface of CMO can be ascribed to the electrochemical oxidation of Co (Co 2+ /Co 3+ /Co 4+ ) and Mn (Mn 2+ /Mn 3+ /Mn 4+ ) ions at their respective electrode potentials [24,56].…”