Published: Jan. 1, 2023

Herein, we investigated CeVO4 nanostructures synthesized using a microwave-assisted hydrothermal method, focusing on their structural and electrochemical properties for potential supercapacitor applications. Notably, the selected synthesis method yielded material that displays lattice spacing consistent with (200) plane of tetragonal structure, as confirmed by high-resolution transmission electron microscopy corroborated X-ray diffraction analysis. In addition, EDX spectroscopy demonstrated high purity sample, only Ce, V, O elements presented, XPS analysis revealed chemical composition oxidation states surface, Ce3+, Ce4+ V5+ identified. Following, cyclic voltammetry tests indicated pseudocapacitive behavior well-defined redox peaks good capacitive stability; then, galvanostatic charge-discharge profiles exhibited specific capacitances at various current densities. After such analyses, an asymmetric was assembled activated carbon cathode, it excellent energy density value 424.43 Wh kg-1 power 2783.11 W (1 A g-1 in 2.0 M KOH). Thus, comprehensive characterizations provided valuable insights into material's storage systems.

Language: Английский