RT journal article
T1 Structural, optical, and electrical characterization of TiO2-doped yttria-stabilized zirconia electrolytes grown by atomic layer deposition
A1 Vázquez, Jorge Luis
A1 Bahrami, Amin
A1 Bohórquez, Carolina
A1 Blanco Ollero, Eduardo
A1 Domínguez de la Vega, Manuel
A1 Soto, Gerardo
A1 Nielsch, K.
A1 Tiznado, Hugo
A2 Física de la Materia Condensada
K1 Atomic-layer deposition
K1 Crystallite size
K1 Electrolyte material
K1 Yttria-stabilized zirconia electrolyte
K1 Electrochemical energy storage devices
AB Electrolyte material optimization is crucial for electrochemical energy storage devices. The specific composition and structure have an impact on conductivity and stability, both of which are essential for efficient device performance. The effects of controlled incorporation of TiO2 into a Yttria-Stabilized Zirconia (YSZ) electrolyte using the atomic layer deposition (ALD) technique are investigated in this study. The surface chemical composition analysis reveals variations in the Ti oxidation state and a decrease in the O/(Zr + Y + Ti) ratio as TiO2 concentration increases. The formation of acceptor states near the valence band is proposed to reduce the bandgap with the Fermi level. The structural properties indicate that as TiO2 concentration increases, surface homogeneity and crystallite size increase. The contact angle with water indicates a hydrophobic behavior influenced by surface morphology and potential oxygen vacancies. Finally, electrical properties, measured in Ru/TiO2-doped YSZ/Au capacitors operated at temperatures between 100 and 170 °C, showed that the TiO2 incorporation improved the ionic conductivity, decreased the activation energy for conductivity, and improved the capacitance of the cells. This study highlights the importance of the ALD technique in solid-state electrolyte engineering for specific applications, such as energy storage devices.
PB American Institute of Physics
SN 2166-532X
YR 2024
FD 2024
LK http://hdl.handle.net/10498/33667
UL http://hdl.handle.net/10498/33667
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-may-2026