One-step synthesis and electrochemical performance of a PbMoO4/CdMoO4 composite as an electrode material for high-performance supercapacitor applications

Abstract

Homogeneously ultrathin nanocubes of PbMoO₄/CdMoO₄ nanocomposites, which are useful for energy storage applications, were prepared on nickel foam using a one-step chemical bath deposition method. The capacitive performance of the synthesized PbMoO₄/CdMoO₄ electrode material was examined by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy in a three-electrode configuration. This unique structure can provide more electroactive sites and a larger surface area, which can enhance the electrochemical performance. The PbMoO₄/CdMoO₄ redox-active material achieved a high specific capacitance of 1840.32 F g⁻¹ at a current density of 1 A g⁻¹ in a 3 M KOH solution. This electrode exhibited excellent long cycle life stability with ∼81.4% specific capacitance retention after 5000 cycles at a current density of 4 A g⁻¹, which is superior to that of individual PbMoO₄ and CdMoO₄ nanosheets. The prepared PbMoO₄/CdMoO₄ composite electrode displayed excellent electrocapacitive properties, which can be attributed to the synergetic effects of PbMoO₄ and CdMoO₄. These results suggest that the PbMoO₄/CdMoO₄ nanocube arrays have the potential to meet the requirements of practical electrochemical energy storage applications.