Showing papers in "Solid State Ionics in 2008"

TL;DR: In this article, a soft chemistry method was used to synthesize BaCe 0.3 Zr 0.5 Y 0.2 O 3 −−−− δ (BCZY, with 0.8) proton conductors to combine the high propton conductivity of barium cerate and good chemical stability of Barium zirconate.

TL;DR: In this article, it was shown that cubic perovskites BaxSr1 − xCo0.8Fe0.2O3 − δ (BSCF) become unstable in air at intermediate temperatures and gradually transform to a hexagonal perovsite on cooling.

TL;DR: In this article, polyaniline films of different thickness have been deposited electrochemically at two different potentials of 0.8 and 1.2 V. Characterization of the surface composition of the material: oxid...

TL;DR: A number of cathodes are being considered for the next generation of lithium ion batteries to replace the expensive LiCoO 2 presently used as discussed by the authors, and a leading candidate is lithium iron phosphate with the olivine structure.

TL;DR: In this paper, the future of rechargeable lithium batteries depends on new approaches, new materials, new understanding and particularly new solid state ionics, and some of the approaches are investigated including, moving lithium-ion electrochemistry to higher potentials, nanowire or mesoporous electrodes and an O 2 cathode.

TL;DR: In this article, the interfaces between LiCoO 2 and sulfide solid electrolytes were modified in order to enhance the high-rate capability of solid-state lithium batteries, and buffer layers of LiNbO 3 and LiTaO 3 can be formed at low temperature for the interfacial modification, because they show high ionic conduction in their amorphous states.

TL;DR: In this article, the authors used powder X-ray diffraction, high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED) and X-Ray photoelectron spectroscopy (XPS) to characterize the phases of FeCo2O4.

TL;DR: In this paper, a dielectric loss spectra showed the presence of one relaxation for all compositions, which is associated with the motions of the Li ion coordinated polymer segments, and the relaxation has been characterized by the empirical Havriliak-Negami (H-N) equation.

TL;DR: In this article, the structure and morphology of the coated Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 samples were characterized and compared.

TL;DR: In this article, the effects of fuel impurity poisoning on Ni-ScSZ cermet anodes have been analyzed and compared, and the degradation of cell performance caused by these impurities was characterized by measuring cell voltage and anode polarization at a constant current density of 0.2 cm − 2 for humidified H 2 and CH 4 fuels.

TL;DR: In this paper, the ionic and electronic conductivities as well as chemical Li-diffusivity in single crystalline LiFePO 4 as a function of crystallographic orientation over an extended temperature range were investigated.

TL;DR: In this article, a co-doping strategy was used to enhance the ionic conductivity of doped ceria, and the lattice parameters were estimated after the detailed analysis of X-ray diffraction data using least-squares extrapolation technique.

TL;DR: In this article, LiCoO2 thin films with different orientations were prepared by radio frequency (RF) magnetron sputtering, and the Li-ion chemical diffusion coefficients, DLi, were measured using cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT), potentiostatic inertion technique (PITT), and electrochemical impedance spectroscopy.

TL;DR: The oxygen nonstoichiometry of Ba0.5Sr 0.5Co 0.8Fe 0.2O3−−−δ (BSCF5582) was investigated by thermogravimetry resulting in values of 2.40 as mentioned in this paper.

TL;DR: In this article, materials formulated as La 2 Ni 1−− x Cu x O 4 + δ (0,≤ x ǫ ≥ 1) have been synthesized to be evaluated as possible cathode materials in SOFCs.

TL;DR: In this article, the basic features of SBS and its applications in stationary energy storage were described and summarized, and the research work in the Shanghai Institute of Ceramics, Chinese Academy of Sciences (SICCAS) on beta-Al2O3 ceramics and the sodium sulfur battery was also introduced.

TL;DR: In this paper, the dynamics of the lithium ions in Li 3 x La 2/3 ǫ−µ x TiO 3, a disordered oxide with perovskite structure, have been investigated by conductivity spectroscopy in the wide frequency range from 1-Hz to 1-GHz and by 7 Li NMR spin-lattice relaxation measurements (T 1 and T 1ρ ) in the temperature range from 150k to 600k.

TL;DR: In this article, the defect and electrical transport properties of Nb-doped strontium titanate (Sr0.94Ti0.9Nb0.1O3) were reported.

TL;DR: In this paper, the authors describe the structure and electrochemical properties of solid oxide fuel cell cathodes prepared by infiltration of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−− ǫ (LSCF) into porous Gd-Doped Ceria (GDC).

TL;DR: In this paper, the performance of anode-supported solid oxide fuel cells (SOFCs) built with La0.58Sr0.4Fe0.8Co0.2O2 − δ (CGO) perovskites is analyzed.

TL;DR: In this paper, the main composition types (Ca-rich, Na-and Ca-rich and K-rich) were treated with boiling concentrated H2SO4 (338°C) and/or in molten NaOH (320°C, with or without water addition).

TL;DR: In this article, a review of gas sensor concepts comprising zeolites is presented, focusing on devices where the zeolite itself acts as the sensitive element, and the present understanding of the underlying detection mechanisms is briefly discussed for various sensor set-ups.

TL;DR: In this paper, a strategy to develop Cr-tolerant cathodes for SOFCs is proposed based on the reaction mechanism, and the mechanism of Cr deposition at LSM and LSCF cathodes is briefly reviewed.

TL;DR: In this paper, the conductivity of lithium ions along three principal axis directions in single crystal LiFePO4 as a function of temperature was investigated using AC impedance spectroscopy.

TL;DR: In this article, a short overview on the different aspects of SOFC materials, especially of new cathode materials, ranging from considerations of material properties to long-term phenomena after cell operation.

TL;DR: In this paper, the surface chemistry of operating model SOFC cathodes with LSM catalyst and YSZ electrolyte was studied in-situ by photoelectron microscopy.

TL;DR: In this paper, a solid oxide fuel cell based fluidized bed configuration was employed for the first time to convert solid carbon directly into electricity, which exhibited typical fuel cell behavior with large ohmic losses.

TL;DR: In this article, the stability and chemical compatibility of GdBaCo 2 O 5+++x with different oxide-ion conductors were evaluated in order to evaluate its suitability as a cathode material for solid oxide fuel cells.

TL;DR: In this paper, a simplifying model to explain the phenomena is presented, and the cathode with only a small amount of CNTs conductive additives shows excellent rate capacity.

TL;DR: In this article, the degradation was found to be related exclusively to the electrode kinetics and measured about 0.5-1.5 mΩ cm2 days−1 depending on temperature with a higher rate measured in moisturised air.