Neodymium Oxide-Based Hybrid Phase Few-Layer mos2 Nanocomposite as High-Performance Symmetric Supercapacitor Electrode

The two-dimensional layered materials (for example MoS<inf>2</inf>) are potential electrodes for supercapacitors with their excellent lamellar structure, high surface area, mechanical flexibility, and potential redox activity. However, due to restacking of chemical structure and low electrical conductivity of the pure MoS<inf>2</inf> electrodes are prevented for energy storage applications. Therefore the electrodes are made up of a composite by a mixture of MoS<inf>2</inf> and rare-earth metals significantly addressing these issues with improved electrical conductivity, large electrochemical active surface, and shorter ion-diffusion kinetics. In the present study, the MoS<inf>2</inf> and MoS<inf>2</inf>/Nd<inf>2</inf>O<inf>3</inf> composite were synthesized by hydrothermal method. The structural phase identification of prepared samples was accomplished by using an X-ray diffractometer (XRD) and Raman spectra. Furthermore, TEM reveals changes in the shape of nanosheets and interlayer spacing. The GCD of symmetric MoS<inf>2</inf>/Nd<inf>2</inf>O<inf>3</inf> composite electrodes displayed remarkable charging/discharging performance, with increased stability and rate capability. The MoS<inf>2</inf>/Nd<inf>2</inf>O<inf>3</inf> composite shows utmost C<inf>sp</inf> of 2528.18 Fg-1 at 1 Ag-1. In addition, the CV and GCD studies suggest that the electrodes exhibit pseudocapacitive behavior and excellent energy density(E) of 191 Wh kg−1 at 1474.1 W kg−1 power density(P) in 1M H<inf>2</inf>SO<inf>4</inf>. The supercapacitor device made up of MoS<inf>2</inf>/Nd<inf>2</inf>O<inf>3</inf> composite shows greater performance in practical LED glowing applications. Therefore, the composites make advancements in energy storage devices like batteries and supercapbatteries due to their excellent energy storage, high electrochemically active surface area, and stability. © 2024 Elsevier Ltd and Techna Group S.r.l.