Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Lower temperature operation of a solid oxide fuel cell (SOFC) is highly desirable for achieving lower cost because less expensive metallic materials can be used for the complete system. Towards this goal, use of a more conducting electrolyte based on scandia-doped zirconia is a promising choice of an electrolyte. A co…
The preferential site for oxygen isotope exchange was investigated on layered films of (La2-xSrx)CoO4 (x = 0.5, 1.0) / (La0.6Sr0.4)CoO3 prepared by PLD on a polycrystalline Ce0.9Gd0.1O1.95. An isotope exchange experiment was performed at 723 K in 18O enriched oxygen of 0.2 ×105 Pa. Three- dimensional imaging of Second…
The microstructure and chemical changes in the Ni-YSZ heterojunctions were studied by scanning, transmission, and high-resolution electron microscopy and X-ray diffraction. It was shown that new nano-size Ni grains are formed at Ni-YSZ interface at the cell operation. The following two stage reaction mechanism was pro…
SOFC is able to attain extremely high efficiency over 70% as LHV, as gas turbine combined cycle system. Mitsubishi Heavy Industries (MHI) has been developing SOFC since 1984. Based on developed technologies, now MHI is on the step of integrating SOFC power generation system. MHI has improved the components and the con…
Investigations on SOFCs using Ni-based anode supports are presented aiming at the understanding of how much oxidation such a cell can tolerate before incurring irreversible mechanical damage. The dimensional strains, elastic modulus and porosity of typical anode supports were measured as a function of the degree of ox…
The hetero-interface electrode, LaSrCoO4-d on La0.6Sr0.4CoO3-d, was examined by means of impedance analysis and steady state polarization method. The performance of the hetero-interface electrode was higher than those of LaSrCoO4-dγandγLa0.6Sr0.4CoO3-d. This is attributed to the enhancement of oxygen exchange at the h…
Compounds with the general formula La0.8Sr0.2Cu1-xMnxO3 were prepared by the citrate route. A solid solution region containing hexagonal perovskite phase, was formed when 0.6{less than or equal to}x{less than or equal to}1, in which oxygen stoichiometry in air changes from oxygen deficiency to oxygen excess with Mn do…
Solid oxide fuel cells (SOFCs) have serious problems under heating cycle. As a solution for this problem, use of micro- tubular SOFCs is considered for robustness under rapid changes of operating temperature. We fabricated cube-shaped SOFC bundles with following method; Micro-tubular Gd-CeO2(GDC)-NiO anode was fabrica…
The properties of composite materials based on mixtures of gadolinium-doped ceria (GDC) and Li2CO3-K2CO3 are analyzed as potential SOFC electrolytes. In a temperature range higher than 500{degree sign}C, their ionic conductivity is significantly higher than for single GDC. Discontinuities were found in the conductivit…
The Na x CoO 2 single-crystal surface is conveniently modified by conducting-probe-mediated reversible electrochemical sodium intercalation/deintercalation reactions; the process, involving versatile erasing, yields more conducting (sodium deintercalation) or more insulating patterns (sodium intercalation).
A new concept of Solid Oxide Fuel Cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at rela…
We have developed a process for fabricating top-gate SrTiO 3 field-effect transistors (FETs) where the critical channel interface is constructed before forming the source and drain electrodes in order to reduce the density of defects in the transistor channel. Metallic source and drain electrodes are formed by Argon i…
The consortium of Topsoe Fuel Cell A/S and Riso̸ National Laboratory has up-scaled its production capacity. Stacks are based on a compact thin plate multilayer design with metallic interconnects and 12x12 cm2 or 18x18 cm2 foot print. Larger (500 cm2) cells are currently under evaluation. Stacks have been tested succes…
Single crystals of PbSc(0.5)Ta(0.5)O(3) with suppressed and enhanced oxygen deficiencies and different degrees of long-range B-site ordering were studied by Raman spectroscopy in order to clarify the significance of the different factors for the formation and growth of ferroic clusters in relaxors. It is shown that th…
Polycrystalline ${\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{O}$ has been fabricated by the standard solid-state reaction method in the concentration range $0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.05$. Ferromagnetic characteristics are observed except for the $x\ensuremath{\leqslant}0.002$ samples…
The reaction and interdiffusion characteristics at the interface of rare earth doped ceria (M0.2Ce0.8O1.9, M = Gd, La) and perovskite- type cathode materials (La0.8Sr0.2CoO3, La0.8Sr0.2FeO3, and La0.8Sr0.2(Co, Fe)O3) were investigated, and their effect on the long-term reliability of SOFC performance was discussed. A…
Abstract Palladium chloride was grafted to amino‐functionalized MCM‐41 to prepare heterogeneous catalysts. XRD, N 2 adsorption–desorption isotherms, IR, 13 C and 29 Si cross‐polarization magic‐angle spinning NMR spectroscopy and XPS techniques were employed to characterize the catalytic materials. The heterogeneous pa…
The interaction of NO with TiO2 (110)-(1 x 2) surface has been studied by X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, Auger electron spectroscopy, and low-energy electron diffraction, with the aim to clarify the role of ordered defects in NO reactivity toward TiO2. The interaction was stu…
Under high pressure, zinc-blende $(B3)$ compounds commonly go through a phase transition to the rocksalt $(B1)$ structure and some of them go to the $\mathrm{NiAs}\phantom{\rule{0.3em}{0ex}}(B8)$ structure. The mechanism of the $B3\text{\ensuremath{-}}B1$ transition is well established, but little is known about the $…
A covalently tethered polymer molecule can spontaneously break away from the surface when polymer/surface interaction is sufficiently unfavorable. This is demonstrated in surface-initiated polymerization of a hydrophilic polymer, hyperbranched polyglycidol, from minority surface sites embedded in a hydrophobic self-as…