Materials Literature
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Pr2NiO4-based ceramic oxides are known promising MIEC cathodes material for SOFC, owing to its experimentally found good ionic and electronic conductivity compared with other known materials. In this study, the structural and electronic properties of pure and doped Pr2NiO4-based oxides are investigated through first p…
SOFCOM is an applied research project (FCH JU Grant Agreement 278798) devoted to demonstrate the technical feasibility, the efficiency and environmental advantages of CHP plants based on SOFC fed by different typologies of biogenous primary fuels (locally produced), integrated by a process for the CO2 separation from…
The effect of reducing time on Cu-Ni alloy formation in a Cu electroless plated Ni/YSZ anode-supported solid oxide fuel cell was investigated. Reduction of the Cu-Ni/YSZ cell in H2 allowed the diffusion of the Cu into the Ni and the formation of Cu-Ni alloy, as evidenced by XRF elemental analysis and characteristic di…
Effect of volatile boron species on the properties of La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode materials has been studied in detail by using porous electrode coatings and dense bar samples. Prior to the characterization, the LSCF samples were heat-treated at 800oC in air in the presence of borosilicate glass for 7 and 30…
A mathematical model which was validated using button cells is used to predict the phosphine induced performance degradation in relatively large planar cells operating on hydrogen fuel. The empirical model parameters are calibrated using button cell experiments as guide. These parameters are then used to perform simul…
In SOFCs, a wide range of fuel gases can be applied, but fuel impurity tolerance may be desired. By applying gadolinia-doped ceria (GDC) anode material, we analyzed power generation characteristics and internal reforming followed by high-resolution electron microscopy in order to moderate sulfur poisoning. Effect of c…
In this paper, a preliminary control law, on the basis of the model-based analysis, is adopted to allow convenient integrations into a comprehensive power tracking control algorithm. The dynamic modeling methodology is employed to assess the dynamic responses of a SOFC stack under startup and load change conditions. T…
A standard reformed biogas composition, based on a 63% CH4 37% CO2 input biogas, was defined by calculation. It is designed to resemble the composition of biogas that would enter a real SOFC stack, assuming 80% fuel utilization, and 25% recirculation of the anode off-gas. It is thermodynamically impervious to coking a…
The present work investigates the performance and degradation mechanisms of a Ni-based anode supported Solid Oxides Fuel Cells (SOFC) operating at 800 and 900°C on direct internal reforming of dry and wet natural gas. The catalytic properties of the anode support were first studied to determine safe conditions under w…
Porous activated carbon is an important electrode material for devices such as supercapacitors, batteries and fuel cells. Despite the research and commercialization work that has been carried out, there is still a need to understand some of the fundamental characteristics of the role of activated carbon and the electr…
(Ba,Sr)(Co,Fe)O3-δ systems, e.g., BaCo0.7Fe0.3-xNbxO3-δ and Ba0.5Sr0.5Co1-xFexO3-δ are the most attractive candidates for oxygen-permeation membranes and SOFC cathodes. Nevertheless, their defect structure is yet to be clarified. The ionic and electronic defects in majority have thus far been believed to be oxygen vac…
In this work (La0.75Sr0.25)0.97Cr0.5Mn0.5O3 (LSCM) perovskite powders were pre-coated with 5 wt% nickel and mixed with different amounts of CGO for testing as anode materials under 3% wet H2. By using scanning transmission electron microscopy (STEM) with X-ray energy dispersive spectroscopy (EDS), we demonstrated that…
Performances of Ni, Pt, and lanthanum strontium cobaltite (LSC) were compared as electrodes for solid oxide fuel cells (SOFCs) at temperatures of 350~450°C. Metal electrodes were prepared as a 150nm-thick porous layer by sputtering and LSC was deposited by pulsed laser deposition. It was identified that the Pt cathode…
Proton exchange membranes (PEMs) are being studied for tritium separation applications involving electrochemical processes. The effects of γ- and β-radiation on Nafion 112 membrane are discussed in this paper. The fluoride and sulfate release from Nafion 112 membrane increases with increase in γ-dose. Oxygen promotes…
The present study investigates the microstructure and corrosion resistance of the cerium conversion coating on AZ91 magnesium plates in the cerium nitrate/hydrogen peroxide aqueous solution with and without sodium metavanadate. The microstructure characterization shows that the conversion coating displays a two-layere…
Understanding the chemical processes that occur at the anode triple phase boundary (TPB) between Ni, YSZ and fuel molecules is essential in determining solid oxide fuel cell (SOFC) anode performance. With a growing interest in vibrational spectroscopy for studying such processes, the surface and vibrational properties…
A new cell design with metallic porous support was selected in order to face with the reduction of IT-SOFC’s operation temperature. Nevertheless, the excessive roughness of the porous metallic interconnect induce additional problems when a thin electrolyte layer is required. In this work, an anode material (NiO-TSZ) b…
A modified organic waste of the caprolactam production is investigated by electrochemical impedance spectroscopy technique as a corrosion inhibitor of carbon steel in 20% hydrochloric solution. It is shown that cyclohexylidenecyclohexanon is a basic inhibiting component in such inhibitor. The inhibitor is investigated…
We investigated the second phase precipitation in (Sr,La)TiO3 interconnect materials in SOFC by utilizing first-principles calculation. Our calculation showed that homologous phase La2Ti2O7 is more stable than monoclinic pyrochlore phase by 0.59 eV/f.u. From the consideration of the precipitation mechanism and phase s…
Due to its high theoretical capacity (147 mAh/g), high operating voltage (~4.7V vs. Li/Li+ of Ni2+/Ni4+ couple), and inherent cycle stability (Mn4+ state, no Jahn-Teller distortion of Mn3+), LiNi0.5Mn1.5O4 (LNMO) spinel is a promising cathode active material for high energy density lithium ion batteries [1, 2, 3] that…