Development of Novel and Ultra-High-Performance Supercapacitor Based on a Four Layered Unique Structure

Abstract

This paper presents an electrode with a core/shell geometry and a unique four-layered porous wrinkled surface for pseudocapacitive supercapacitor applications. To design the electrode, Ni foam was used as a substrate, where the harmonious features of four constituents, ZnO (Z), NiS (N), PEDOT:PSS (P), and MnO 2 (M) improved the supercapacitor electrochemical performance by mitigating the drawbacks of each other component. Cyclic voltammetry and galvanostatic charge discharge measurements confirmed that the ZNPM hybrid electrode exhibited excellent capacitive properties in 2 M KOH compared to the ZNP, ZN, and solely Z electrodes. The ZNPM electrode showed superior electrochemical capacitive performance and improved electrical conductivity with a high specific capacitance of 2072.52 F g −1 at 5 mA, and a high energy density of 31 Wh kg −1 at a power density of 107 W kg −1 . Overall, ZNPM is a promising combination electrode material that can be used in supercapacitors and other electrochemical energy conversion/storage devices.

One-pot facile synthesis of nanorice-like structured CuS@WS2 as an advanced electroactive material for high-performance supercapacitors

“…The specific capacitance decreased gradually with increasing current density from 3.75 to 15.0 A g −1 due to the resistance of the electrode and insufficient Faradaic redox reaction at high current densities. The higher specific capacitance of CuS@WS 2 was attributed to its higher surface area with the improved surface morphology of nanostructures [35] (Tables 1, 2).…”

A Novel Strategy of Multi‐element Nanocomposite Synthesis for High Performance ZnO‐CoSe2 Supercapacitor Material Development

“…Among the various transition metal oxides, ZnO exhibits direct band gap, which may promote a quicker electrochemical response and a higher power density. [ 21 ] Further beneficiated from the technical advantages like low cost, environmental friendliness, easy fabrication, ZnO has been considered as one of the most promising advanced electrode materials of SCs. [19] Nevertheless, the unsatisfactory rate capability and cycle stability as well as the poor electrical conductivity limit its practical application.…”