Designing an asymmetric device based on graphene wrapped yolk–double shell NiGa₂S₄ hollow microspheres and graphene wrapped FeS₂–FeSe₂ core–shell cratered spheres with outstanding energy density

Abstract

We introduce an asymmetric supercapacitor composed of graphene wrapped yolk-double shell NiGa2S4 as a cathode, and graphene wrapped FeS2–FeSe2 core–shell as an anode.

Designing an Advanced Supercapattery Based on CuCo2S4@Ni−Mo−S Nanosheet Arrays

“…[1][2][3][4][5][6] SCs are considered as one of the intriguing candidates for next-generation ESDs owing to their obvious merits like considerable power density, amazing robustness, and rapid charging-discharging rate, but the relatively insignificant specific energy restricts their usages. [7][8][9][10][11] Conversely, batteries have great specific energy, but low power density. [12,13] An ESD based on a capacitive electrode (e. g. AC) and battery-type electrode (e. g. metal oxide or metal sulfide) named supercapattery, proposes a promising approach to design system with merits of SCs and batteries.…”

“…SCs are considered as one of the intriguing candidates for next‐generation ESDs owing to their obvious merits like considerable power density, amazing robustness, and rapid charging‐discharging rate, but the relatively insignificant specific energy restricts their usages . Conversely, batteries have great specific energy, but low power density .…”

One‐Step Synthesis of Porous Ni−Co−Fe−S Nanosheet Arrays as an Efficient Battery‐Type Electrode Material for Hybrid Supercapacitors

“…There is a pair of voltage platform on all plots, whose their potentials match with peak potential of CV plots, depicting battery-type redox nature of as-fabricated electrode. [58,59] Also, the NFCS-NS electrode indicates almost symmetric characteristics, displaying reasonable Coulombic efficiency. [60,61] Figure 7b represents the calculated capacities of the NFCS-NS electrode with respect to current densities.…”

Bi‐Metal (Zn, Mn) Metal–Organic Framework–Derived ZnMnO3 Micro‐Sheets Wrapped Uniformly with Polypyrrole Conductive Network toward High‐Performance Li‐Ion Batteries

“…At present, Li‐ion batteries (LIBs) as attractive energy‐storage devices have been widely applied in electric vehicles (EVs), hybrid EVs, mobile phones, laptops, and other electric products in view of their versatile advantages . Moreover, the gradually increasing market requirement for the rechargeable LIBs with even higher discharge capacity hugely inspires the enormous research interest in exploring novel high‐performance electrode materials .…”