Bimetallic Metal–Organic Framework (MOF)–Derived NiO/CuO‐Embedded Carbon for Supercapacitor

Abstract

ABSTRACT Metal–organic frameworks (MOFs) can be efficient precursors for synthesizing metal oxide‐embedded carbon nanomaterials. Bimetallic MOF of nickel and copper was synthesized and used to prepare metal oxide of copper and nickel embedded into carbon, denoted as NiO/CuO@C. The material was characterized using X‐ray diffraction (XRD), transmission electron microscopy (TEM) image, high‐resolution TEM (HR‐TEM) image, and X‐ray photoelectron spectroscopy (XPS). Data analysis of the material characterization confirms the synthesis of NiO/CuO@C. The electrochemical measurements of the prepared materials were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using Nyquists plots and Bode plots. NiO/CuO@C‐loaded nickel foam (NF) showed specific capacitance of 735, 536, 525, 486, 450, 400, 303, 232, and 169 F/g at scan rates of 0.5, 1, 2, 4, 10, 20, 50, 100, and 200 mV/s, respectively. The material exhibits good electrochemical performance and can be used for energy storage.