Construction of hierarchical nanoporous CuCo2V2O8 hollow spheres as a novel electrode material for high-performance asymmetric supercapacitors

3D hierarchical cobalt vanadate nanosheet arrays on Ni foam coupled with redox additive for enhanced supercapacitor performance

“…The GCD curves obtained using the KOH show a plateau at about 0.05 V for Co( ii ) ↔ Co( iii ) and 0.29 V for Co( iii ) ↔ Co( iv ). 18,31 In the case of the RA electrolyte, the lower plateau is insignificance. However the upper plateau is raised to a high V near 0.35 V, indicating the contribution of the redox-active K 3 [Fe(CN) 6 ].…”

“…23,30 During the charging process, the oxidation of Co occurs: Co 2+ to Co 3+ and Co 3+ to Co 4+ , leading to the loss of electrons. The electrons then transfer to Fe(CN) 6 18,31 In the case of the RA electrolyte, the lower plateau is insignicance. However the upper plateau is raised to a high V near 0.35 V, indicating the contribution of the redoxactive K 3 [Fe(CN) 6 ].…”

A high-performance hybrid supercapacitor by encapsulating binder-less FeCoSe2 nanosheets@NiCoSe2 nanoflowers in a graphene network

“…3,4 Supercapacitors as one of the renewable ESDs have become a research hotspot thanks to their unique features, such as super-long cyclic durability, good rate capability, high-power density, and rapid charge/discharge, and wide use in electronic equipment, power grids, and electrical vehicles. [5][6][7][8][9][10][11][12] However, their limited energy density remains a hindrance in their widespread commercial applications. 13 Hybridization of capacitive-type and battery-type electrodes offers an effective approach to enhance their energy densities.…”

Novel Rugby-Ball-like FeCoCuS2 Triple-Shelled Hollow Nanostructures with Enhanced Performance for Supercapattery

“…The pressing global energy crisis along with the rising environmental pollution has actively incentivized scientists to develop sustainable and renewable alternatives for conventional fossil fuels. − Among the numerous types of sustainable energy systems, electrochemical energy storage devices have garnered significant attention as they are gradually becoming prominent candidates for this type of storage. Considering their distinctive properties such as fast charge–discharge rates, significant power density, good durability, and long cycle life, supercapacitors (SCs) have been found to be one of the most promising energy storage devices that proved very enticing for further studies in recent years. − Nevertheless, the low energy density limits their practical application. − Hence, it is imperative to enhance the energy density of the SCs without sacrificing their power density through expanding cell potentials and improving specific capacities. − …”