Regensburg 2025 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 12: Materials for the Storage and Conversion of Energy
MM 12.5: Talk
Tuesday, March 18, 2025, 11:15–11:30, H22
Enhanced Supercapacitor Performance of Sr-Doped Barium Stannate (BaSnO3) Nanostructures: Synthesis, Characterization, and Electrochemical Insights — Alaa Farid1,2, •Diaa EL-Rahman Rayan1,3, Moataz Fayed4, Saad Mohamed4, Abdel Hakim Kandil2, Mohamed Abd El-Nasser2, and Mohamed Rashad1 — 1Central Metallurgical Research and Development Institute (CMRDI), P.O. Box: 87 Helwan, 11421, Egypt — 2Chemistry Department, Faculty of Science, Helwan University, Cairo, Egypt — 3Department of Physics, Deraya University, New Minia, Minya, Egypt — 4Mining and Metallurgy Engineering Department, Tabbin Institute for Metallurgical Studies, (TIMS), Tabbin, Helwan, Cairo Egypt
This study investigates the structural, morphological, thermal, and electrochemical properties of Sr-doped barium stannate. The annealing of undoped BaSnO3 at various temperatures leads to the formation of cubic BaSnO3 phase predominating at 1100 ∘C. The increasing Sr ion doping induces lattice strain, with slight shifts in the (110) peak. HR-TEM analysis confirms high crystallinity with a significant reduction in particle size from 125.3 to 22.6 nm due to Sr doping. Electrochemical performance tests in a three-electrode configuration show that Sr doping significantly enhances charge storage capacity, with Ba0.8Sr0.2SnO3 achieving a maximum specific capacitance of 1902 F.g-1 at 1 A.g-1. Additionally, the device demonstrated an impressive energy density of 65.6 Wh.kg-1 at a power density of 1633.54 W.kg-1.
Keywords: Barium stannate (BaSnO3); Synthesis and Characterization; Supercapacitors; electrochemical impedance spectroscopy (EIS); Asymmetric Hybrid Supercapacitor