Three-Dimensional ZnCo-MOF Modified Graphene Sponge: Flexible Electrode Material for Symmetric Supercapacitor

Developing flexible, lightweight, and portable energy storage systems have become a necessity with the advent of wearable electronic devices in modern society. We report novel, easy, low-cost way to fabricate flexible bimetallic metal–organic framework (MOF) doped graphene sponge (GS) free-standing materials (ZnCo-MOF/GS). The electrochemical behavior ZnCo-MOF/GS was probed via galvanostatic charge–discharge, impedance spectroscopy, cyclic voltammetry. morphological structural studies this material were performed by scanning electron microscopy, energy-dispersive X-ray photoelectron diffraction, Raman spectrometry. exhibited high specific capacitance 695 F/g at 1.0 A/g excellent stability 78% retention after 7500 cycle test 3.0 M KOH. Furthermore, based symmetric supercapacitor (SC) fabricated, device displayed 302 A/g, an density 108 W h/kg, power 5037 W/kg. Moreover, SC kept its performance severe bending conditions. believe that our electrode outstanding has great potential applications, especially for lightweight electronics.