Akademik Veri Yönetim Sistemi
BRAZILIAN JOURNAL OF PHYSICS, cilt.55, sa.6, 2025 (SCI-Expanded, Scopus)
Efficient energy storage is essential for sustainable technological development, with supercapacitors emerging as a promising solution due to their high power density and long cycle life. To enhance their electrochemical performance, the discovery and optimization of advanced electrode materials are critical. Cerium oxide (CeO2) has recently gained attention, particularly when doped with rare-earth elements such as neodymium (Nd). This study investigates the structural, morphological, and electrochemical properties of Nd-doped CeO2 synthesized via the glycine combustion method with Nd concentrations of 3, 6, and 9 mol%. Crystalline structure was characterized using X-ray diffraction (XRD), Rietveld refinement, and Raman spectroscopy. All samples exhibited a face-centered cubic (fcc) lattice, and Raman analysis confirmed that Nd incorporation maintained the structural integrity while inducing oxygen vacancies. Morphological analysis via field emission scanning electron microscopy (FESEM-EDS) and Brunauer-Emmett-Teller (BET) measurements revealed nanoparticles with sizes below 100 nm and uniform elemental distribution aligned with the target doping levels. Electrochemical behavior was assessed through cyclic voltammetry. The 3 mol% Nd-doped CeO2 sample demonstrated the highest specific capacitance of 40 F g(-1), attributed to its optimized defect structure and enhanced surface characteristics. These findings suggest that Nd-doped CeO2, particularly at low doping concentrations, holds significant promise as an efficient electrode material for next-generation supercapacitor applications.