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Articles 31 - 60 of 74
Full-Text Articles in Engineering
Performance Of A Commercial Cathode-Supported Solid Oxide Fuel Cells Prepared By Single-Step Infiltration Of An Ion-Conducting Electrocatalyst, Xue Li, Nansheng Xu, Xuan Zhao, Kevin Huang
Performance Of A Commercial Cathode-Supported Solid Oxide Fuel Cells Prepared By Single-Step Infiltration Of An Ion-Conducting Electrocatalyst, Xue Li, Nansheng Xu, Xuan Zhao, Kevin Huang
Kevin Huang
No abstract provided.
Phosphoric Acid-Imbibed Three-Dimensional Polyacrylamide/Poly(Vinyl Alcohol) Hyrdogel As A New Class Of High-Temperature Proton Exchange Membrane, Qunwei Tang, Kevin Huang, Guoging Qian, Brian Benicewicz
Phosphoric Acid-Imbibed Three-Dimensional Polyacrylamide/Poly(Vinyl Alcohol) Hyrdogel As A New Class Of High-Temperature Proton Exchange Membrane, Qunwei Tang, Kevin Huang, Guoging Qian, Brian Benicewicz
Kevin Huang
No abstract provided.
Increasing Power Density Of Lsgm-Based Solid Oxide Fuel Cells Using New Anode Materials, Kevin Huang, Jen-Hau Wan, John Goodenough
Increasing Power Density Of Lsgm-Based Solid Oxide Fuel Cells Using New Anode Materials, Kevin Huang, Jen-Hau Wan, John Goodenough
Kevin Huang
Chemical reactions between the superior perovskite oxide-ion conductor Sr- and Mg-doped LaGaO3 (LSGM), CeO2, and NiO have been studied by powder X-ray diffraction. The results showed that an extensive reactivity occurs as a result of La migration driven by a gradient of La chemical activity. La migration across the LSGM/electrode interfaces in a fuel cell leads to the formation of resistive phases at the interface, either LaSrGa3O7 or LaSrGaO4. Use of 40 mol % La2O3 -doped CeO2 as an interlayer between anode and electrolyte as well as in the NiO-containing anode prevents all reactions found. Consequently, the air-H2 cell maximum …
Characterization Of Iron-Based Alloy Interconnects For Reduced Temperature Solid Oxide Fuel Cells, Kevin Huang, Peggy Hou, John Goodenough
Characterization Of Iron-Based Alloy Interconnects For Reduced Temperature Solid Oxide Fuel Cells, Kevin Huang, Peggy Hou, John Goodenough
Kevin Huang
No abstract provided.
Cathode-Supported Tubular Solid Oxide Fuel Cell Technology: A Critical Review, Kevin Huang
Cathode-Supported Tubular Solid Oxide Fuel Cell Technology: A Critical Review, Kevin Huang
Kevin Huang
No abstract provided.
Superior Perovskite Oxide-Ion Conductor Sr- And Mg- Doped Lagao3: Part Ii Ac Impedance Spectroscopy, Kevin Huang, Robin Tichy, John Goodenough
Superior Perovskite Oxide-Ion Conductor Sr- And Mg- Doped Lagao3: Part Ii Ac Impedance Spectroscopy, Kevin Huang, Robin Tichy, John Goodenough
Kevin Huang
No abstract provided.
Superior Perovskite Oxide-Ion Conductor; Strontium- And Magnesium-Doped Lagao3: Iii, Performance Tests Of Single Ceramic Fuel Cells, Kevin Huang, Robin Tichy, John Goodenough, Christopher Milliken
Superior Perovskite Oxide-Ion Conductor; Strontium- And Magnesium-Doped Lagao3: Iii, Performance Tests Of Single Ceramic Fuel Cells, Kevin Huang, Robin Tichy, John Goodenough, Christopher Milliken
Kevin Huang
No abstract provided.
Electrical Conductivity And Stability Of A-Site Deficient (La, Sc) Co-Doped Srtio3 Mixed Ionic-Electronic Conductor, Xue Li, Hailei Zhao, Dawei Luo, Kevin Huang
Electrical Conductivity And Stability Of A-Site Deficient (La, Sc) Co-Doped Srtio3 Mixed Ionic-Electronic Conductor, Xue Li, Hailei Zhao, Dawei Luo, Kevin Huang
Kevin Huang
No abstract provided.
Molten Carbonates As An Effective Oxygen Reduction Catalyst For 550–650°C Solid Oxide Fuel Cells, Yunhui Gong, Xue Li, Lingling Zhang, Whitney Tharp, Changyong Qin, Kevin Huang
Molten Carbonates As An Effective Oxygen Reduction Catalyst For 550–650°C Solid Oxide Fuel Cells, Yunhui Gong, Xue Li, Lingling Zhang, Whitney Tharp, Changyong Qin, Kevin Huang
Kevin Huang
We report the first study that investigates the use of molten carbonates as an effective catalyst to promote electrochemical oxygen reduction reaction (ORR) at the cathode of intermediate temperature solid oxide fuel cells (IT-SOFCs). A series of binary Li-K carbonate compositions were incorporated into the porous backbones of a commercial cathode assembled in symmetrical impedance cells for electrochemical characterization. Within the temperature range of 550–650◦C, we observed that the polarization and ohmic area-specific resistances of the original sample can be significantly reduced by the introduction of molten carbonates. A new ORR charge-transfer model involving two intermediate species CO5 2− and …
Rapid Determination Of Electronic Conductivity In Mgo-Partially Stabilized Zro2 Electrolytes Using Emf Method, Kevin Huang, Yuhua Xia, Qingguo Liu
Rapid Determination Of Electronic Conductivity In Mgo-Partially Stabilized Zro2 Electrolytes Using Emf Method, Kevin Huang, Yuhua Xia, Qingguo Liu
Kevin Huang
No abstract provided.
Geometry-Dependent Oxygen Diffusion Flux And Limiting Current Density Of The Cathode In A Cathode-Supported Solid Oxide Fuel Cell, Kevin Huang, James Shull
Geometry-Dependent Oxygen Diffusion Flux And Limiting Current Density Of The Cathode In A Cathode-Supported Solid Oxide Fuel Cell, Kevin Huang, James Shull
Kevin Huang
An analysis is performed on the diffusion of oxygen through tubular porous cathode substrates having several different geometries. It is shown that the flux of oxygen as it diffuses through these different substrate geometries can be explicitly expressed by a general analytical form with a unique geometric factor for each type of substrate geometry. Experimental measurements of the geometry-independent term, oxygen diffusivity, were conducted for two representative geometries: cylindrical and triangular tubes. These measurements show good agreement between samples with similar porosities and thus favorably support the oxygen flux equations presented. Formulations for the limiting current density were also derived …
Characterization Of Ba1-X-YCaXSrYTio3 Perovskites As Pb-Free Dielectric Materials, Lingling Zhang, Siwei Wang, Xusheng Wang, Kevin Huang
Characterization Of Ba1-X-YCaXSrYTio3 Perovskites As Pb-Free Dielectric Materials, Lingling Zhang, Siwei Wang, Xusheng Wang, Kevin Huang
Kevin Huang
Use of lead-containing piezoelectric components in electrical and electronic devices has been banned on the EU market since July 1st, 2006. Development of lead-free high performance piezoelectric materials to meet the strong market demand is therefore imperative. In this paper, we report a systematic study on the structural, dielectric and ferroelectric properties of one class of lead-free piezoelectric materials, Ba1-x-yCaxSryTiO3 (x = 0-0.4, and y = 0-0.2) ceramics, using techniques such as XRD, SEM, impedance analyzer, and ferroelectric analyzer. It is found that with increasing Sr concentration in Ba1-ySryTiO3 and Ba0.8-ySryCa0.2TiO3, the crystal structure transforms from tetragonal to cubic along …
Synthesis And Characterizations Of A-Site Deficient Perovskite Sr0.9Ti0.8−XGaXNb0.2O3, Guoliang Xiao, Xihui Dong, Kevin Huang, Fanglin Chen
Synthesis And Characterizations Of A-Site Deficient Perovskite Sr0.9Ti0.8−XGaXNb0.2O3, Guoliang Xiao, Xihui Dong, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
Flux Of Silver-Carbonate Membranes For Post-Combustion Co2 Capture: The Effects Of Membrane Thickness, Gas Concentration And Time, Lingling Zhang, Yunhui Gong, Kyle Brinkman, Tao Wei, Siwei Wang, Kevin Huang
Flux Of Silver-Carbonate Membranes For Post-Combustion Co2 Capture: The Effects Of Membrane Thickness, Gas Concentration And Time, Lingling Zhang, Yunhui Gong, Kyle Brinkman, Tao Wei, Siwei Wang, Kevin Huang
Kevin Huang
No abstract provided.
Stabilizing Nanostructured Solid Oxide Fuel Cell Cathode With Atomic Layer Deposition, Yunhui Gong, Diego Palacio, Xueyan Song, Rajankumar Patel, Xinhua Liang, Xuan Zhao, John Goodenough, Kevin Huang
Stabilizing Nanostructured Solid Oxide Fuel Cell Cathode With Atomic Layer Deposition, Yunhui Gong, Diego Palacio, Xueyan Song, Rajankumar Patel, Xinhua Liang, Xuan Zhao, John Goodenough, Kevin Huang
Kevin Huang
No abstract provided.
Surface Modified Silver-Carbonate Mixed Conducting Membranes For High Flux Co2 Separation With Enhanced Stability, Lingling Zhang, Yunhui Gong, Jacob Yaggie, Siwei Wang, Kevin Romito, Kevin Huang
Surface Modified Silver-Carbonate Mixed Conducting Membranes For High Flux Co2 Separation With Enhanced Stability, Lingling Zhang, Yunhui Gong, Jacob Yaggie, Siwei Wang, Kevin Romito, Kevin Huang
Kevin Huang
No abstract provided.
Solid Oxide Iron-Air Rechargeable Battery - A New Energy Storage Mechanism, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Solid Oxide Iron-Air Rechargeable Battery - A New Energy Storage Mechanism, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Kevin Huang
No abstract provided.
Energy Storage Characteristics Of A New Rechargeable Solid Oxide Iron-Air Battery, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Energy Storage Characteristics Of A New Rechargeable Solid Oxide Iron-Air Battery, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Kevin Huang
Cost effective and large scale energy storage is critical to renewable energy integration and smart-grid energy infrastructure. Rechargeable batteries have great potential to become a class of cost effective technology suited for large scale energy storage. In this paper, we report the energy storage characteristics of a newly developed rechargeable solid oxide iron–air battery. Investigations of the battery’s performance under various current densities and cycle durations show that iron utilization plays a determining role in storage capacity and round-trip efficiency. Further studies of the battery's cycle life reveal a unique charge-cycle originated degradation mechanism that can be interpreted by a …
Long Term Stability Study Of A Solid Oxide Metal-Air Battery, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Long Term Stability Study Of A Solid Oxide Metal-Air Battery, Xuan Zhao, Nansheng Xu, Xue Li, Yunhui Gong, Kevin Huang
Kevin Huang
No abstract provided.
Low Temperature Densification And Electrical Property Of A Carbonate-Added Proton Conducting Ceramic, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Low Temperature Densification And Electrical Property Of A Carbonate-Added Proton Conducting Ceramic, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Kevin Huang
Proton conducting yttrium-doped barium zirconate (BZY) is one of the most studied materials for SOFC applications due to its high bulk proton conductivity, good chemical stability under CO2 and mechanical robustness. However, it requires a very high temperature (1700-2100°C) and long sintering time (>24 h), even with nano-sized powers, to sinter into a dense ceramic. In this paper, we demonstrate a unique approach to make a dense BZY at much lower temperatures. The method involves prefabrication of a porous BZY matrix by solid-state reaction from micro-sized powders of BaCO3, ZrO2 and Y2O3 and densification by impregnating the porous BZY …
Oxide-Ion Conducting Ceramics For Solid Oxide Fuel Cells, Kevin Huang, Jen-Hau Wan, John Goodenough
Oxide-Ion Conducting Ceramics For Solid Oxide Fuel Cells, Kevin Huang, Jen-Hau Wan, John Goodenough
Kevin Huang
No abstract provided.
Performance Of Vapor-Fed Direct Dimethyl Ether Fuel Cell Utilizing High Temperature Polybenzimidazole Polymer Electrolyte Membrane, Jay Neutzler, Guoging Qian, Kevin Huang, Brian Benicewicz
Performance Of Vapor-Fed Direct Dimethyl Ether Fuel Cell Utilizing High Temperature Polybenzimidazole Polymer Electrolyte Membrane, Jay Neutzler, Guoging Qian, Kevin Huang, Brian Benicewicz
Kevin Huang
No abstract provided.
Proton Conduction Behaviors In Ba- And Mg-Doped Lagao3, Xuan Zhao, Nansheng Xu, Kevin Romito, Kevin Huang, Alisha Lucas, Changyong Qin
Proton Conduction Behaviors In Ba- And Mg-Doped Lagao3, Xuan Zhao, Nansheng Xu, Kevin Romito, Kevin Huang, Alisha Lucas, Changyong Qin
Kevin Huang
No abstract provided.
Synthesis Of Mixed Oxide-Ion And Carbonate-Ion Conductors Supported By A Prefabricated Porous Solid Oxide Matrix, Lingling Zhang, Xue Li, Siwei Wang, Kevin Romito, Kevin Huang
Synthesis Of Mixed Oxide-Ion And Carbonate-Ion Conductors Supported By A Prefabricated Porous Solid Oxide Matrix, Lingling Zhang, Xue Li, Siwei Wang, Kevin Romito, Kevin Huang
Kevin Huang
No abstract provided.
Sr2Fe4/3Mo2/3O6 As Anodes For Solid Oxide Fuel Cells, Guoliang Xiao, Qiang Liu, Xihui Dong, Kevin Huang, Fanglin Chen
Sr2Fe4/3Mo2/3O6 As Anodes For Solid Oxide Fuel Cells, Guoliang Xiao, Qiang Liu, Xihui Dong, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
Electrode Performance Test On Single Ceramic Fuel Cells Using As Electrolyte Sr‐ And Mg‐Doped Lagao3, Kevin Huang, Man Feng, John Goodenough, Christopher Milliken
Electrode Performance Test On Single Ceramic Fuel Cells Using As Electrolyte Sr‐ And Mg‐Doped Lagao3, Kevin Huang, Man Feng, John Goodenough, Christopher Milliken
Kevin Huang
The electrode performance of a single solid oxide fuel cell was evaluated using a 500 μm thick La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM) as the electrolyte membrane. Comparison of La0.6Sr0.4CoO3-δ (LSCo) and La0.9Sr0.1MnO3 (LSM) as cathodes showed LSCo gave an exchange current density two orders of magnitude higher than that of LSM. Comparison of CeO2/Ni and LSGM/Ni as anodes showed a degradation of the latter with time, and studies of the anode‐electrolyte interface and the reactivity of NiO and LSGM suggest better anode …
High Temperature Electrolysis Using A Pilot-Scale Cathode-Supported Tubular Solid Oxide Fuel Cell, Gong Zhang, Kevin Huang
High Temperature Electrolysis Using A Pilot-Scale Cathode-Supported Tubular Solid Oxide Fuel Cell, Gong Zhang, Kevin Huang
Kevin Huang
A Siemens cathode-supported solid oxide fuel cell was explored in this study to operate as an electrolysis cell to produce H2 from steam. An in-situ oxygen sensor was implemented in the cell assembly to determine the oxide-to-fuel ratio in the effluent, from which the rate of H2 production and steam utilization were calculated. No H2 was added into the initial steam. The results showed that the rate of H2 production linearly increased with the applied current and the steam can be split into H2 at high utilization. After hundreds of hours' operation, no degradation was observed. However, it was found …
Oxygen Permeation Through Composite Oxide-Ion And Electronic Conductors, Kevin Huang, Michael Schroeder, John Goodenough
Oxygen Permeation Through Composite Oxide-Ion And Electronic Conductors, Kevin Huang, Michael Schroeder, John Goodenough
Kevin Huang
Oxygen permeation through composites consisting of four well-known oxide-ion conductors and a noble metal, Pd or Ag, is reported. The oxides were Zr0.9Y0.1O1.95 (YSZ), (Bi1.75Y0.25O3)0.95(CeO2)0.05 (BYC5), Ce0.8Sm0.2O1.9 (SSC), and La0.8Sr0.2Ga0.83Mg0.17O2.815 (LSGM). The results show that (BYC5 + Ag) yields the highest oxygen permeation flux, but the composite deteriorates with time. The composites (SSC + Pd), (LSGM + Pd), and (YSZ + Pd) give stable, but relatively lower oxygen permeation flux in the order of (SSC + Pd) > (LSGM + Pd) > (YSZ + Pd). The composite microstructures indicate that (BYC5 + Ag) has the best percolating network for both oxide-ion and …
Strontium- And Manganese-Doped Lanthanum Gallate As A Potential Anode Material For Intermediate-Temperature Solid Oxide Fuel Cells, Xihui Dong, Paul Gardner, Thomas Reitz, Kevin Huang, Fanglin Chen
Strontium- And Manganese-Doped Lanthanum Gallate As A Potential Anode Material For Intermediate-Temperature Solid Oxide Fuel Cells, Xihui Dong, Paul Gardner, Thomas Reitz, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
La0.9−XCaXCe0.1Cro3−Δ As Potential Anode Materials For Solid Oxide Fuel Cells, Xihui Dong, Shuguo Ma, Kevin Huang, Fanglin Chen
La0.9−XCaXCe0.1Cro3−Δ As Potential Anode Materials For Solid Oxide Fuel Cells, Xihui Dong, Shuguo Ma, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.