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Electrochemical study of the Ni(OH)2/MnO2 bilayer film obtained by cathodic electrodeposition for application in energy storage devices
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2024-12-20 , DOI: 10.1016/j.jallcom.2024.178229 M.R. Cunha, L. Aguilera, R.R. Passos, L.A. Pocrifka
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2024-12-20 , DOI: 10.1016/j.jallcom.2024.178229 M.R. Cunha, L. Aguilera, R.R. Passos, L.A. Pocrifka
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This study focuses on the preparation and characterization of a Ni(OH)2/MnO2 bilayer film, synthesized using the cathodic electrodeposition method on a stainless steel substrate. The formation of the bilayer was confirmed through X-Ray Diffraction (XRD) and Energy Dispersive Spectroscopy (EDS). Scanning Electron Microscopy (SEM) provided insights into the morphology of the film, while the electrochemical behavior was investigated using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS). The bilayer material exhibited a significantly higher specific capacity of 331.1 C g⁻¹ at a current density of 0.5 A g⁻¹, surpassing the capacities of individual Ni(OH)2 (221.6 C g⁻¹) and MnO2 (180.3 C g⁻¹) films. Notably, the bilayer film demonstrated excellent cycling stability, retaining 97.2% of its specific capacity after 10,000 cycles at a scan rate of 100 mV s-1. The enhanced electrochemical performance is attributed to the synergistic interaction between the layers, indicating promising potential for applications in energy storage devices, such as supercapacitors. This work underscores the viability of Ni(OH)2/MnO2 bilayer films for advancing energy storage technologies.
更新日期：2024-12-20
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