Materials Literature
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Composite oxides have been attracting great interest recently as alternative materials for SOFC anodes with the potential to overcome the serious deterioration in performance associated with the traditional Ni-based cermet; in particular, oxide based anodes show enhanced carbon coke and re-oxidation tolerance compared…
In the frame of a common project on the development of prototype micro-cogeneration systems for household applications, ENEA and FCLAB have characterized a 1kWel and a 2.5kWel tubular-type SOFC technology-based unit respectively. Spanning the entire operational window of the two systems (within boundary conditions set…
Two BaZr0.7Pr0.1Y0.2O3-δ (BZPY) layers were used to sandwich a BaCe0.8Y0.2O3-δ (BCY) layer to produce a tri-layer electrolyte consisting of BZPY/BCY/BZPY. The BZPY layers significantly improved the chemical stability of the BCY electrolyte layer, which was not stable when tested alone, suggesting that the BZPY layer e…
Crystallizing glasses are considered the state-of-the art solution to obtain a hermetic seal for solid oxide fuel cells. While these glass-ceramics exhibit good bonding to the interconnect alloys of the stack as well as good mechanical strength, viscous flow at operation temperatures may be expected only to a minor ex…
The dual layer ceramic hollow fibers, such as YSZ/Ni-YSZ or Ni-YSZ/porous YSZ for the micro tubular solid oxide fuel cells were prepared by a co-spinning-sintering process. The cells from YSZ/Ni-YSZ dual layer hollow fiber show a high output power density using hydrogen as the fuel, but a short life time using methane…
A full dense Gadolinia-Doped Ceria (GDC) electrolyte with fine grains fabricated at low temperature is significant both to the performance optimization and cost effective of intermediate temperature solid oxide fuel cells (IT-SOFC). Calculated by density functional theory (DFT), it's found that the Li+ doped CeO2 crys…
The anodic reactions of solid oxide fuel cells are examined by density functional theory method under different oxygen coverage on the Ni(111) surface. The oxidation reactions H, OH and CO are calculated and the reaction barriers are affected by the oxygen potential. The concept of oxygen potential is introduced to di…
Dense micrometric La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) films were deposited by spin-coating on porous LSGM scaffolds characterized by homogeneous pore structure. Porous anodes were infiltrated with aqueous nickel and nickel/copper nitrate solutions, dried and fired at 700 °C. Homogeneous metal coating with proper interconn…
Porous anodic aluminum (PAA) templates with uniform diameter pores were prepared by two step anodic oxidation method. The resultant PAA was characterized using field emission scanning electron microscopy (FESEM), and the preparation parameters of PAA templates were investigated. The barrier of PAA was dissolved by elec…
Four compositions of TbxCe0.95-xGd0.05O2-δ (0.15 ≤ x ≤ 0.40) have been prepared by varying the Tb content. Phase formation, thermal expansion, ionic conductivity, electronic conductivity, ionic transference number and optical properties have been investigated. XRD results indicate that TbxCe0.95-xGd0.05O2-δ (TCGO) sam…
Murata Manufacturing Co., Ltd. has been developing a new concept, planar-type solid oxide fuel cell (SOFC) fabricated using a single-step co-firing process. Each cell consists of an electrolyte, electrodes, current collectors, gas-separators with manifolds, and gas-flow channels. The membrane electrode assembly (MEA)…
In the present work we explore the phosphododecamolybdate heteropolyblue-mediated synthesis of gold nanoparticles, acting as a new generation electrocatalytic system exhibiting appreciable activity toward reduction of carbon oxide (IV) and reduction of oxygen (after combining with Co-porphyrin). We explore the ability…
One of the reasons for the degradation of solid oxide fuel cells (SOFC) is the released adhesion between the cathode and the interlayer on the electrolyte. The adhesion strength and the power generation performance of cells are dependent on the firing temperature of the cathode in fabrication. In this study, in order…
The feasibility of Ni supported Zr0.75Ce0.25O2-δ (ZCO) composites as steam methane reformable anode has been studied. ZCO powder was prepared by combustion synthesis technique using L-alanine as fuel. Phase pure material with average particle size below 1 µm was obtained upon calcination at 700oC for 6 h. Thermal expa…
A package for the power source of mobile electronic devices based on micro solid oxide fuel cells (micro-SOFCs) was designed considering thermal management. The package should suppress its surface temperature lower than harmless value for other electrical circuits, and thermal consistency should be kept. In addition,…
While Solid Oxide Fuel Cells (SOFCs) have attracted increasing attention, there are only a limited number of papers on exchange current density, representing electrode activity to describe and simulate SOFC performance. In this study, theoretical relationships on anode exchange current density has been derived as a fu…
Research developed an embedded sensor system within an o-ring capable of monitoring seal life and health. An electronic system interfacing signal generation and processing was used to determine if the embedded sensor system was capable of capturing and responding to physical changes within an o-ring. Signals were cond…
Proton conductor SrZr0.95Y0.05O3-δ thin films have been deposited on SrTiO3(100) substrates by RF magnetron sputtering. The as-deposited thin films exhibit highly a-axis orientation on the substrate. The lattice constant of a-axis decreases with increasing film thickness. The thin film consists of small grain and smoo…
The effect of cation nonstoichiometry on the enhancement of surface reaction kinetics of oxide cathode has been studied with bi-layer (La,Sr)CoO3 and LaCoO3 dense thin film electrodes fabricated by an RF-sputtering method for improving the solid oxide fuel cells’ performance. The bi-layer electrodes with cation (A-sit…
Terbium and samarium co-doped ceria was studied as electrolyte membrane for intermediate temperature solid oxide fuel cell single cells. The ceramic doped ceria powders with different composition like Ce0.9Sm0.1O2- δ and Ce0.9SmxTbyO2- δ were synthesized using glycine-nitrate thermal decomposition process and the film…