Chemical solution deposition of Gd-doped YBCO, Y₁Gd_yBa₂Cu₃O_7−δ, (YBCO-Gd), film was carried out following the metal-organic decomposition approach and in situ route. Two dopant concentrations, 5 and 10 mol %, were evaluated. The morphology and crystalline structure of the superconductor films were deeply investigated. In general, a homogeneous and well c-axis oriented film was observed by using scanning and transmission electron microscopy (SEM and TEM) and X-ray diffraction. However, compared to pure YBCO, YBCO-Gd samples showed an increased stacking faults concentration, as recognized by TEM. X-ray photoelectron spectroscopy allowed studying the Gd distribution in the films and gathered information about the Gd electronic environment. Superconducting properties were evaluated at different temperatures, magnetic field directions, and intensities. Higher zero-field critical current densities were measured with respect to undoped samples in the temperature range from 10 to 77 K with both Gd concentrations (i.e., 28, 27, and 13 MA·cm⁻², respectively, for YBCO-Gd 5%, YBCO-Gd 10%, and undoped YBCO at 10 K in self field condition). At low temperatures, this improvement was maintained up to 12 T, confirming the efficacy of Gd addition for the enhancement of transport properties of YBCO film.

Here, we demonstrate the electrochemical intercalation of Ca²⁺ ions within the lattice of anatase nanotubes (a‐NTs) synthesized by hydrothermal treatment of TiO₂/NaOH precursors followed by Na⁺/H⁺ ion exchange and H₂O‐loss at high temperature in air. Scanning electron microscopy, X‐ray diffraction, and Raman spectroscopy confirm the formation of nanosized anatase, whereas transmission electron microscopy highlights the formation of nanotubular morphologies with an average diameter of 10 nm. TiO₂ electrodes are able to deliver reversible specific capacities in aprotic batteries vs. calcium metal or in hybrid configurations vs. capacitive activated carbon using aprotic electrolytes (i. e., Ca(BH₄)₂ in tetrahydrofuran or Ca(TFSI)₂ in dimethoxyethane, respectively). The electrochemical intercalation of Ca²⁺ ions into the anatase lattice is confirmed by X‐ray absorption spectroscopy in close comparison with Na⁺ and Li⁺ intercalations. Ca²⁺ incorporation leads to the partial amorphization of the TiO₂ lattice despite the limited Ca/Ti ratio (i. e., 0.09) obtained in discharge. The analysis of the extended X‐ray absorption fine structure region allows the determination of the local structure of the incorporated Ca²⁺ ions and confirms that a disordered environment is obtained after the electrochemical reaction.