Enhanced capacitive properties of all-metal-oxide-nanoparticle-based asymmetric supercapacitors

Abstract

This study reports on an asymmetric supercapacitor consisting of two composite transition metal oxide (TiO2–Fe2O3 and TiO2–MnO2) nanoparticles-based electrodes working in different potential ranges.

Metal Coated Fabric Based Asymmetric Supercapacitor for Wearable Applications

“…The low energy density of FSCs is one area that requires greater attention and one of the solutions to this is to increase the specific capacitance [18]. In this regard the asymmetric SCs (ASC), which consists of two different types of electrode (negative and positive) can be helpful as they have presence of both the pseudocapacitance and the electric double layer capacitance (edlc) [3,[19][20][21]. The ASCs generally use carbon-based material such as graphene, carbon nanotube (CNT), graphite and their composites for negative electrode and the pseudocapacitive materials such as transition metal oxides and their composites as positive electrode [3,[21][22][23][24][25].…”

Emergent pseudocapacitive behavior of single-walled carbon nanotube hybrids: a materials perspective

“…58 Transition metal oxides (TMOs) usually display redox pseudocapacitance as they possess metastable variable oxidation states and can undergo oxidation and reduction in a given voltage window due to a completely reversible reaction during the charging and discharging process. 59 On the other hand, transition metal dichalcogenides (TMDs), metal nitrides, MXenes, and some classes of metal oxides exhibit layered structures, enabling them to have intercalation and de-intercalation of ions without distorting the original electrode structure. 60 It is also hypothesised that further enhancement in the newage intercalation materials could be obtained by strategically tuning the interlayer expansion in the layered electrode material.…”

Dual-ZIF-derived “reassembling strategy” to hollow MnCoS nanospheres for aqueous asymmetric supercapacitors

“…To solve the current energy crisis and serious environmental problems, novel electrochemical energy storage equipment with high efficiency has been considered as one of the solutions. 1,2 Among the numerous energy storage devices, supercapacitors deliver high power density, have a fast charge–discharge process and long cycling life, and are widely used in military equipment, intelligent instruments and hybrid vehicles. 3,4 For practical uses, asymmetric supercapacitors (ASCs) were fabricated by employing the battery type electrode and electric double-layer electrode in one cell.…”