Materials Literature
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The first microfluidic synthesis of ionomer-based bifunctional Janus supraballs possessing two distinct magnetic-nanoparticle-dropped and quantum dots–polymer hemispheres within an anisotropic structure is reported. Based on such Janus supraballs with stable fluorescence and superparamagnetism, a magnetoresponsive flu…
Organic electronics have led to a rapidly growing market for flexible transparent electrodes. Novel two-dimensional graphene is considered a realistic candidate to replace ITO electrode due to its unique properties, such as favorable work function, low resistance, high optical transmittance, good chemical and thermal…
The interactions of nanoparticles with the soft surfaces of biological systems like cells play key roles in executing their biomedical functions and in toxicity. The discovery or design of new biomedical functions, or the prediction of the toxicological consequences of nanoparticles in vivo, first require knowledge of…
A novel design of tubular segmented-in-series solid oxide fuel cell (SOFC) unit bundle was presented in this paper. The tubular ceramic support was fabricated by the extrusion technique. The anode functional layer and the yttria-stabilized zirconia (YSZ) electrolyte are deposited onto the ceramic support by dip coatin…
High operating temperatures (600-1000oC) of solid oxide fuel cell (SOFC) systems have been a concern to many users as well as fuel cell developers. In portable applications, the challenges of how to heat the stack from ambient temperatures to operating temperatures and then maintain those temperatures need to be addre…
Low-pressure injection moulding (LPIM) technique was successfully developed to fabricate porous NiO-YSZ anode substrates for cone-shaped tubular anode-supported solid oxide fuel cells. A single cell, NiO-YSZ / YSZ/ LSM-YSZ was assembled and tested to demonstrate the feasibility of the technique applied. The single cel…
Thin-film GDC (Ce0.8Gd0.2O2-x 300 nm thick) electrodes with porous Ni or Au metal overlayers (300 nm thick) were sputter-deposited on polycrystalline YSZ substrates and tested in single-chamber cells. With a back-side Pt-counter electrode, the electrochemical cells were characterized by linear-sweep voltammetry and im…
To develop better and less expensive electrocatalysts for the oxidation of ethanol in direct ethanol fuel cells, several combinations of a conductive polymer polyaniline, dispersed Pt particles and pre-dispersed metal particles, such as Sn and Fe, were examined. The electrocatalytic activity of the Pt particles was re…
Rapidly growing attention is being recently directed towards the investigation of the ionic conducting properties of oxide film hetero-structures. Experimental evidence has been reported showing that interfacial phenomena at hetero-phase interfaces give rise to faster ion conduction pathways than the bulk or homo-phas…
The development of an electric power generation technology that effectively uses coal, our major domestic energy source, and meets environmental requirements and water conservation needs, is of crucial importance to the United States. Work to achieve that objective is being done by the U.S. Department of Energy Office…
ZnO layers having variable percentage of Zn-contents were prepared to ascertain the role of Zn-interstitial defect in the ultraviolet (UV) emission from ZnO with the help of photoluminescence (PL) measurements. The typical PL spectrum performed at room temperature displayed a dominant UV line at 3.28 eV and a visible…
The present work describes the effect on the performance of a SOFC when a Gd0.2Ce0.8O1.9 (GDC) layer has been introduced as diffusion barrier layer between the yttria stabilized zirconia (YSZ) electrolyte and the La0.6Sr0.4Co1-xFexO3-δ (LSCF) cathode of an anode supported cell with a Ni-YSZ anode. The dense, thin and…
In the present study, the strain effect on the oxygen migration in the yttria-stabilized zirconia electrolyte has been investigated by means of the molecular dynamics simulation and the experiment. In both the simulation and the experiment, the oxygen migration is examined under uniaxial stress conditions. The result…
Solid oxide fuel cell systems (SOFC) can improve the efficiency of electrical power generation from biogas compared to small scale CHP units. The SOFC requires a reforming step converting biogas into synthesis gas (hydrogen and carbon monoxide). . Dry reforming of methane with the carbon dioxide contained in biogas is…
Copper interconnects have gained wide acceptance in the microelectronics industry due to improved resistivity and reliability compared to Al interconnects. Initially SiO2 was used as the interlevel dielectric. To reduce interconnect capacitance, C-doped SiO2 or SiCOH was introduced at the 90 nm node, and porous SiCOH…
SOFCpower-HTceramix' mission is to offer new energy solutions to the distributed electricity market based upon its efficient and competitive Solid Oxide Fuel Cell (SOFC) technology. The company develops and manufactures SOFC power modules in close collaboration with European heat appliance OEMs and utilities for domes…
We have tested a silver nano-mesh with close-packed holes as cathodic catalysts for intermediate temperature solid oxide fuel cells. The nano-mesh structure was fabricated in a close-packed hexagonal array with the pore size of 500~600nm. Fuel cell tests were conducted using the nano-mesh silver cathodes with commerci…
The individual electrode processes from anode and cathode have been clearly identified from practical impedance spectra with high-frequency inductive impedance for the Mitsubishi segmented-in-series tubular solid oxide fuel cell by combining the distribution of relaxation times (DRT) analysis and the complex nonlinear…
An anode-supported flat tubular SOFC stack for intermediate temperature (700~800oC) operation was fabricated and operated in this study. For this purpose, we fabricated anode-supported flat tubular cells by optimization of the current collecting method and the induction brazing process. After that, we designed a compa…
In this study, the reformate operation of solid oxide fuel cells (SOFC) is characterized by electrochemical impedance spectroscopy. The characterization is performed over a broad measuring range of temperature and H/C/O-ratios of the fuel. The kinetic parameters of the electrochemical oxidation of the fuel are obtaine…