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Competition between pinning produced by extrinsic random point disorder and superconducting thermal fluctuations in oxygen-deficient GdBa2Cu3Ox coated conductors
(IOP Publishing, 2019-11)
We report on the influence of random point defects introduced by 3 MeV proton irradiation on the vortex dynamics of 1.3 μm thick GdBa2Cu3Ox coated conductors. Thin films with different oxygen stoichiometry (6.7 < × < 7) ...
Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3-:δ: Potential cathode components for protonic ceramic fuel cells
(Royal Society of Chemistry, 2018-03)
A complete solid solution forms between the perovskite proton conductor BaZr0.7Ce0.2Y0.1O3-δ (BZCY72) and BaPr0.9Y0.1O3-δ (BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected ...
Revisiting the Crystal Structure of BaCe0.4Zr0.4Y0.2O3-δ Proton Conducting Perovskite and Its Correlation with Transport Properties
(American Chemical Society, 2020-02)
Oxides with proton conductivity have a great potential for applications in environmental energy technology. Despite the BaCe0.4Zr0.4Y0.2O3-δ (BCZY) perovskites being well-known proton conductors, it is a challenge to ...
Study of BaCe0.4Zr0.4Y0.2O3-δ/BaCe0.8Pr0.2O3-δ (BCZY/BCP) bilayer membrane for Protonic Conductor Solid Oxide Fuel Cells (PC-SOFC)
(Pergamon-Elsevier Science Ltd, 2020-02)
This paper address the blocking of the electronic conductivity for a BaCe0.8Pr0.2O3-δ (BCP) material due to the addition of a BaCe0.4Zr0.4Y0.2O3-δ (BCZY) thin layer. Barium cerates (BCP and BCZY) show interesting features ...
Effect of Pr-doping on structural, electrical, thermodynamic, and mechanical properties of BaCeO3-d as proton conductor
(Electrochemical Society, 2014)
Strong influence of the oxygen stoichiometry on the vortex bundle size and critical current densities J c of GdBa2Cu3O x -coated conductors grown by co-evaporation
(IOP Publishing, 2017-08-11)
We report on the influence of oxygen stoichiometry on the vortex creep mechanism of GdBa2Cu3Ox-coated conductors produced by co-evaporation. The oxygen stoichiometry of the films, x, was modified in a controlled way between ...
Visualization of the Diffusion Pathway of Protons in (NH4)2Si0.5Ti0.5P4O13 as an Electrolyte for Intermediate-Temperature Fuel Cells
(American Chemical Society, 2018-01)
We demonstrate that (NH4)2Si0.5Ti0.5P4O13 is an excellent proton conductor. The crystallographic information concerning the hydrogen positions is unraveled from neutron-powder-diffraction (NPD) data for the first time. ...