Rational design of Mg(OH)2/Cu2(OH)3(NO3) binary heterostructure electrodes for enriched supercapacitors performance

The electrode material properties, such as widening the voltage window, rational design, and morphology are known to play an essential role in increasing its efficiency for energy storage devices. Herein, a simple strategy to first prepare a Mg(OH)2/Cu2(OH)3(NO3) (MHCNx) binary heterostructure by co-precipitation method. The morphology studies from SEM and HR-TEM analysis revealed that the Mg(OH)2 and Mg(OH)2/Cu2(OH)3(NO3) binary heterostructures show quasi-spherical and nanosheet-like structures. The electrochemical characteristics of as-prepared binary heterostructure electrodes were investigated by a three-electrode system. At a low current density of 5 Ag−1, the specific capacitance of the MHCN-2 achieved 146 Fg−1. The MHCN-2 electrode displayed capacitance retention of 97