Redox mediator-enhanced charge storage in dimensionally tailored nanostructures towards flexible hybrid solid-state supercapacitors

Abstract

Redox mediator-amplified charge storage in a dimensionally engineered 2D GaN@1D ZnCo2O4 nanostructure towards high-performance flexible supercapacitors.

Can Doped-MXene-Based Supercapacitors Be the Game-Changer for Future Energy Landscape? A Critical Perspective

“…The property alterations of doped MXene with respect to selective dopants have been briefly discussed in this section, while the details of the effect of doping on electrochemical performance have been presented in sections 2. 3 Selective doping impacts MXenes through various mechanisms, for instance, electronic structure modification, which involves bandgap engineering and charge carrier density tuning. Heteroatom doping introduces states in the bandgap or shifts the conduction and valence bands, by adjusting the bandgap to tailor the electronic and optical properties for specific applications.…”

“…Electrode materials' physicochemical properties, such as electrical conductivity, specific surface area, porosity, chemical composition, and redox-active sites, principally influence the electrochemical performance of SCs. 2,3 SCs are typically categorized into electric double-layer capacitors (EDLC), pseudocapacitors, and hybrid SCs based on their energy storage mechanisms. EDLCs store charge through reversible adsorption/desorption of electrolyte ions on electrode surfaces without redox reactions, displaying high power density and long cyclic life.…”

“…The progress of these technologies depends on the realization of high-performing and reliable energy storage devices. , In this regard, supercapacitors (SCs) have emerged as a promising alternative owing to their fast charge–discharge rates, long cycle life, and high power density. Electrode materials’ physicochemical properties, such as electrical conductivity, specific surface area, porosity, chemical composition, and redox-active sites, principally influence the electrochemical performance of SCs. , SCs are typically categorized into electric double-layer capacitors (EDLC), pseudocapacitors, and hybrid SCs based on their energy storage mechanisms. EDLCs store charge through reversible adsorption/desorption of electrolyte ions on electrode surfaces without redox reactions, displaying high power density and long cyclic life.…”

“…However, pseudocapacitors undergo rapid surface or near-surface oxidation–reduction reactions, offering high specific capacity and energy density but somehow lacking in longevity. Hybrid SCs combine both EDLCs and pseudocapacitor mechanisms, offering superb electrochemical performance for next-generation SCs. − Thus, it is vital to develop advanced electrode materials exhibiting characteristics of a hybrid charge storage mechanism for achieving high-performance SCs.…”

A Comprehensive Review of Ammonium Ion Hybrid Supercapacitors: Exploring Recent Breakthroughs and Future Horizons

“…This configuration typically involves one electrode material with battery-type or pseudocapacitive behavior and another with capacitive or EDLC-type behavior. HSCs differ from traditional symmetric SCs, where both electrodes exhibit capacitive behavior. , The design of hybrid SCs can be tailored to meet specific requirements related to electrodes, electrolytes, and device specifications.…”