Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Pseudocapacitive Performance of Molybdenum Oxide/Reduced Graphene Oxide Hybrid Electrode Fabricated by a Two-Step Procedure of Electrochemical Deposition and Hydrothermal

Document Type : Original Reaearch Article

Authors
Mina Pirhayati 1
Mahdi Kazazi 2
Behzad Koozegar Kaleji 2
1 Master's degree, Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Hamedan, Iran.
2 Associate Professor, Department of Materials Engineering, Faculty of Engineering, Malayer University, Malayer, Hamedan, Iran.
10.30501/jamt.2025.493058.1312
Abstract
A binder-free hybrid electrode composed of reduced graphene oxide (rGO) and molybdenum oxide (MoO3) was prepared using hydrothermal and electrodeposition processes. First, rGO nanosheets were deposited hydrothermally, followed by the electrochemical deposition of MoO3. The structural and morphological properties of MoO3 and rGO/MoO3 electrodes were examined using XRD and FESEM. The findings indicated that α-MoO3 particles were effectively deposited onto the surface of reduced graphene oxide (rGO) nanosheets, resulting in a porous structure ideal for energy storage applications. The pseudocapacitive characteristics of the electrodes were assessed through CV, GCD, and EIS techniques in potassium hydroxide aqueous electrolyte. The as-fabricated pure and hybrid electrodes exhibited specific capacitance values of 563 and 1021 F g⁻¹, respectively, when tested at a galvanostatic discharge rate of 1 A g⁻¹. Additionally, the rGO/MoO3 hybrid electrode demonstrated excellent cyclic stability, achieving a capacitance retention of 84.7% after 2000 cycles at 5 A g⁻¹.
Keywords
Supercapacitor
Binder Free Electrode
Molybdenum Oxide
Hydrothermal
Electrochemical Deposition
Subjects
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  • Receive Date 21 December 2024
  • Revise Date 19 January 2025
  • Accept Date 01 March 2025