Zinc Cobalt Layered Double Hydroxide Electrode for High-Performance Supercapacitor

Abstract

We aim to fabricate a ZnCo layered double hydroxide (LDH) nanostructure through facile one-pot hydrothermal synthesis.ZnCo LDH with interconnected hexagonal sheets having ultrathin thickness with voids are synthesized for the effective penetration of electrolytes to achieve superior electrochemical properties.The as-synthesized ZnCo LDH nanostructure is then subjected to structural, morphological, phase, and electrochemical studies.As an electrode for a supercapacitor, the ZnCo LDH has an areal capacitance of 1964 mFcm -2 at a 5 mVs -1 scan rate, an energy density of 0.22 mWhcm -2 , and an excellent cycling stability (112 %) after 2000 charge-discharge cycles.