Showing papers in "Solid State Ionics in 1992"

TL;DR: In this article, the ionic conductivities of samaria-doped ceria-alkaline-earth and rare-earth oxide systems were investigated in relation to their structures, electrical conductivities, and reducibilities.

TL;DR: In this paper, a brief account of phase assemblage expected in commonly used binary and some ternary zirconia (with CaO, MgO, Y 2O3, Sc2O3 and rare-earth oxides) systems is given.

TL;DR: In this article, the impedance of Li3.3PO3.9N0.17 was analyzed using two models in which the frequency dependence of the bulk response was represented by a Cole-Cole dielectric function and a constant phase angle element.

TL;DR: In this article, the effect of doping in the A and B sites of the ABO3 structure was investigated for the manganite and cobaltite perovskites.

TL;DR: A crystal chemistry study of the LiNi1−yCoyO2 system has been realized in this article, where the shape of all the charge curves is very similar with a small decrease in potential when y increases due to the influence of cobalt which does not participate significantly in the redox process.

TL;DR: In this article, a strategy for selecting perovskite-based solid electrolytes with the potential for achieving high ionic conductivities at intermediate temperatures (≈600 °C) was discussed.

TL;DR: In this article, the solid-solution series LixMnyNi1−yO2 can be prepared as a single phase for x near 1 and 0≤y ≤ 0.5.

TL;DR: In this article, perovskite-type oxides are used as components of high temperature fuel cells and as oxygen separation membranes, and the particular properties that these applications require are reviewed.

TL;DR: In this paper, an attempt was made to improve LaMnO3 high temperature air cathodes by using an electrode structure which resembles that of porous electrodes of liquid electrolyte fuel cells, and the addition of YSZ prevented the formation of highly resistive La2Zr2O7 which has otherwise been formed at the electrode-electrolyte interface.

TL;DR: Proton conduction in SrZrO 3 -based oxides which were doped with aliovalent cations such as Yb 3+, Y 3+, Ga 3+ ), Al 3+ and In 3+ was investigated as discussed by the authors.

TL;DR: In this paper, the relationship between nonstoichiometry, electrical properties and diffusion of perovskite-type oxides, ABO3 (B = Al, Zr, Bi, Cr, Mn, Fe, Co), was reviewed to elucidate the characteristics of pervskite type electrode materials, La1-xSrxBO3.

TL;DR: In this paper, the stability of conductive complex oxides can be discussed in terms of the lattice stability of particular structures as a function of composition, the valence stability of transition metal ions against oxidative or reductive decompositions, the abilities of the formation of lattice defects, and the chemical stability against reactions with other components and with gaseous substances.

TL;DR: In this article, a doubly doped ceria electrolyte is proposed for high power density operation on hydrocarbon fuels, which offers the advantage of high oxide ion conductivity without the restrictive materials problems of a high operating temperature.

TL;DR: In this article, the chemical reactivity and interdiffusion of (La, Sr)MnO3 and (Zr, Y)O2 were studied from 1110 to 1755 K.

TL;DR: In this article, a high-temperature study of conductivity if BaCe0.9Gd0.1O2.95 and some related compounds display a transition from protonic to oxide ion conduction, at 600 to 1000°C.

TL;DR: Li et al. as discussed by the authors synthesized a new lithium ion conductive solid electrolyte based on Li 2 S-SiS 2 glass with the composition: 0.03Li 3 PO 4 -0.59Li 2 S 0.38 SiS 2 at ambient pressure by quenching in liquid nitrogen.

TL;DR: In this paper, the properties of perovskite-type oxides and their possible applications are described and their properties of these ion conducting ceramics found by us and their potential applications are decribed in this paper.

TL;DR: In this paper, the authors review designs and properties of ECDs, giving special emphasis to transparent devices, i.e., smart windows, and classify them according to the type of electrolyte or ion conductor: liquid, solid inorganic in bulk or thin-film form, or solid organic (polymer).

TL;DR: In this paper, the authors used secondary ion mass spectrometry (SIMS) to determine the O18 stable isotope depth distribution for polycrystalline cobaltite perovskite solid solutions.

TL;DR: In this paper, the corrosive environment in solid oxide fuels cells (SOFCs) using natural gas (mainly methane) as fuel is considered, where noble metals, nickel and chromia-forming alloys are considered as potential metallic interconnects and their corrosion behavior in the SOFC environment is discussed.

TL;DR: In this paper, the performance of Gd-doped BaCeO 3 ceramics was investigated by electrochemical methods (hydrogen permeation test and hydrogen-oxygen fuel cell test) in the temperature range of 600°C to 1000°C.

TL;DR: In this paper, performance data on two polymorphs of titanium dioxide (anatase and rutile) operating in a lithium polymer electrolyte cell at 120°C were presented.

TL;DR: A detailed study of protonic conductivity in Nd-doped BaCeO3 is made using water-uptake and galvanic-cell measurements to supplement the conductivity results as mentioned in this paper.

TL;DR: In this article, a review of oxide systems with fluorite and pyrochlore structures which hold particular promise in solid oxide fuel cell systems is presented, including the Gd 2 (Zr x Ti 1−x ) 2 O 7 (GZT) and related systems, which allow control of the relative degree of intrinsic and extrinsic disorder by control of composition.

TL;DR: In this article, the authors measured the TPD spectra of perovskite-type oxides and found that the proton concentrations were smaller in the order of BaCe0.95Yb0.05O3−α, CaZr0.9In0.

TL;DR: In this article, a thermodynamic analysis of the nonstoichiometry at La site in LaMnO 3 plays an important role on the reaction, and it was found that diffusion of Mn into YSZ leads to increase of La activity at the interface and promotes the reaction.

TL;DR: In this paper, the electrical properties of Mn-doped YSZ (yttria stabilized zirconia) were investigated and the polarization cell was employed to determine the electronic conductivity.

TL;DR: In this paper, a zirconium phosphonate of formula: Zr(O3PC6H4SO3H)0.73(O 3PCH2ﷸOH)1.27·nH2O was prepared and characterized by X-ray powder diffraction, thermogravimetric analysis, EMF and ac conductivity measurements.

TL;DR: In this paper, an empirical impedance expression has been deduced: Z ∗ =R 0 /(1+iω/ω 1 +(iω /ω 2 ) n ) where ω 1 and ω 2 characterize respectively the lattice response and the "universal behavior" of the charge carriers.

TL;DR: Several lithium compounds have been sputtered in a planar rf magnetron source as discussed by the authors, and nearly stoichiometric films were obtained, however, this was due to the decomposition of the target and the segregation of large amounts of Li 2 O to the unsputtered areas.