Recent developments of hybrid metal chalcogenides for high performance supercapacitors

Scalable Synthesis of Ni3B2O6 Nanograins and Fabrication of a Coin Cell Supercapacitor for Powering Temperature Sensor Devices

“…When the scan rate is low, ions get enough time to migrate and intercalate with both outer and inner pore surfaces, contributing to efficacious redox reactions and thereby causing an increase in the specific capacitance. However, when the scan rate becomes higher, due to lower electrolytic ion diffusion, the ions have a short time to intercalate into the lattice of the active material, which reduces the surface-controlled storage, thereby decreasing the specific capacitance. , The galvanostatic charge–discharge (GCD) of the NBNG electrode was carried out in the potential range of 0–0.51 V versus an SCE in 6 M KOH aqueous electrolyte. Figure b illustrates the GCD curves of the NBNG electrode for varying current densities from 1 to 7 A g –1 .…”

Recent Developments in Electrodeposition of Transition Metal Chalcogenides‐Based Electrode Materials for Advance Supercapacitor Applications: A Review

“…The potency of TMCs to exhibit high electrochemical reversibility due to fast charge kinetics, high theoretical specific capacitance, long cycle life, high power density and better safety tolerance makes them viable electrode materials for supercapacitors applicable in a wide range of consumer devices, backup powers, hybrid electric vehicles and portable electronics. [47] No doubt, metal oxides and carbon-based materials have been exploited as electrode materials, transition metal sulphides (TMSs) have lately captured the spotlight due to their higher electrical conductivity, strong thermal and mechanical stability, electrochemically rich redox reactions, and presence of sulphur facilitates the easy transportation of ions. [10] Likewise, selenium being placed in the same group as sulphur, so transition metal selenides (TMSes) show properties resembling with TMSs.…”

“…Unlike the comprehensive applications of single-component TMCs for supercapacitors, its inherent properties will not be able to accomplish the demanding criteria for emerging energy storage devices. [47] Several factors such as low conductivity, volume alterations during charging-discharging leading to poor cyclability, limited surface area due to aggregation and restacking of layers, and restricted access to electrochemical active sites, are hindering their capacitive performance. Hence one of the potential strategies adopted is to fabricate mixed metal chalcogenides which are efficacious owing to the synergistic effects of individual components guiding to high electrical conductivity, rich redox active sites and stability.…”

“…Fabrication of hybrid TMCs/TMCs heterostructures are newly adopted approach to enhance the electrochemical activity which could avoid the restacking, agglomeration and volume alteration issues. [47] To fix this, constructing core-shell hybrid composites could be an effective pathway for improving the electrochemical performance by exposing numerous electroactive sites and facilitating the easy transfer of ions at the electrode-electrolyte interface. Based on this concept, Wan et al designed a core-shell structure of FeNiSe 2 @Ni 4.5 Co 4.5 S 8 on carbon cloth (CC) substrate through electrodeposition and selenization reaction as illustrated in Figure 9a.…”

“…Unlike the comprehensive applications of single‐component TMCs for supercapacitors, its inherent properties will not be able to accomplish the demanding criteria for emerging energy storage devices [47] . Several factors such as low conductivity, volume alterations during charging‐discharging leading to poor cyclability, limited surface area due to aggregation and restacking of layers, and restricted access to electrochemical active sites, are hindering their capacitive performance.…”