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- Solid oxide fuel cell (SOFC) (9)
- Solid oxide fuel cells (SOFC) (7)
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- Perovskite (4)
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- Electrical properties (3)
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- Lanthanum compounds (3)
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- SOFC (3)
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- Ceria (2)
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Articles 1 - 30 of 73
Full-Text Articles in Mechanical Engineering
A New Solid Oxide Molybdenum–Air Redox Battery, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
A New Solid Oxide Molybdenum–Air Redox Battery, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
Kevin Huang
A new type of rechargeable molybdenum–air battery based on the technologies of reversible solid oxide fuel cells and chemical looping is reported in this study. The reversible solid oxide fuel cell serves as the electrical unit to realize the charging and discharging cycles while a pair of Mo/MoO2 redox couple integrated with the reversible solid oxide fuel cell stores electrical energy via an H2–H2O oxygen shuttle. The specific charge of the new battery reaches 1117 A h per kg-Mo at 550°C, which is 45% higher than the non-rechargeable Mo–air battery. The corresponding discharge specific energy is 974 W h per …
Combining Proton Conductor Bazr0.8Y0.2O3-Δ With Carbonate: Promoted Densification And Enhanced Proton Conductivity, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Combining Proton Conductor Bazr0.8Y0.2O3-Δ With Carbonate: Promoted Densification And Enhanced Proton Conductivity, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Kevin Huang
No abstract provided.
H3Po4-Imbibed Three-Dimensional Polyacrylamide/Polyacrylamide Hydrogel As A High-Temperature Proton Exchange Membrane With Excellent Acid Retention, Qunwei Tang, Guoging Qian, Kevin Huang
H3Po4-Imbibed Three-Dimensional Polyacrylamide/Polyacrylamide Hydrogel As A High-Temperature Proton Exchange Membrane With Excellent Acid Retention, Qunwei Tang, Guoging Qian, Kevin Huang
Kevin Huang
We herein report the use of polyacrylamide/polyacrylamide interpenetrating polymer network (PAM/PAM IPN) hydrogel as a matrix to imbibe proton conducting H3PO4, forming a robust proton exchange membrane (PEM) suitable for high-temperature PEM fuel cells by combining excellent acid retention, simple synthesis, and low cost. Its extraordinary ability to absorb large quantity of aqueous solution is fully utilized to achieve high H3PO4 loading, showing a proton conductivity of 0.0833 S cm−1 at 183 °C in dry air. The synthesized membrane also shows excellent acid retention even under mechanical load and high humidity. These profound advantages along with simple and low-cost synthesis …
Sol-Gel Synthesis Of A New Oxide-Ion Conductor Sr- And Mg-Doped Lagao3 Perovskite, Kevin Huang, Man Feng, John Goodenough
Sol-Gel Synthesis Of A New Oxide-Ion Conductor Sr- And Mg-Doped Lagao3 Perovskite, Kevin Huang, Man Feng, John Goodenough
Kevin Huang
No abstract provided.
A Novel Intermediate-Temperature All Ceramic Iron–Air Redox Battery: The Effect Of Current Density And Cycle Duration, Xuan Zhao, Xue Li, Yunhui Gong, Nansheng Xu, Kevin Huang
A Novel Intermediate-Temperature All Ceramic Iron–Air Redox Battery: The Effect Of Current Density And Cycle Duration, Xuan Zhao, Xue Li, Yunhui Gong, Nansheng Xu, Kevin Huang
Kevin Huang
We here report the energy storage characteristics of a new all ceramic iron–air redox battery comprising of a reversible solid oxide fuel cell as the charger/discharger and a Fe–FeOx redox couple as the chemical storage bed. The effects of current density and cycle duration on specific energy and round trip efficiency of the new battery have been systematically studied at 650°C and 550°C. The results explicitly show that current density is the most influential variable on the performance, signifying the importance of improving electrochemical performance of the reversible solid oxide fuel cell.
High Conductivity 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
High Conductivity 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.
Beneficial Effects Of Mg-Excess In La1-XSrXGa1-YMgY + ZO3-Δ As Solid Electrolyte, Xuan Zhao, Xue Li, Nansheng Xu, Kevin Huang
Beneficial Effects Of Mg-Excess In La1-XSrXGa1-YMgY + ZO3-Δ As Solid Electrolyte, Xuan Zhao, Xue Li, Nansheng Xu, Kevin Huang
Kevin Huang
One of the paramount obstacles to the commercialization of La1-xSrxGa1-yMgyO3-δ (LSGM)-based intermediate-temperature solid oxide fuel cells is the high cost and low mechanical strength associated with the use of Ga2O3. We demonstrate in this study the use of excess Mg-doping on Ga-site as a means of lowering cost and potentially increasing mechanical strength of the final LSGM product. Conventional techniques such as XRD, SEM and AC impedance spectroscopy are applied to characterize the synthesized Mg-excess La0.8Sr0.2Ga0.83Mg0.17 + zO3-δ. The microstructures revealed by SEM indicate an increased appearance of the Mg-rich second phase along the grain-boundaries with increasing Mg-excess level even …
Development Of Delta-Type High Power Density Solid Oxide Fuel Cells At Siemens Stationary Fuel Cells, Kevin Huang
Development Of Delta-Type High Power Density Solid Oxide Fuel Cells At Siemens Stationary Fuel Cells, Kevin Huang
Kevin Huang
This paper describes recent development in Siemens Stationary Fuel Cells of Delta-type high power density solid oxide fuel cells, the foundation for future high power and high efficiency electrical power generation. Relatively high-level overviews are given in the areas of cell materials, basic cell design, basic bundle design and basic module design. The testing results of six-cell Delta 9 bundle and single Delta 8 cell are particularly highlighted to demonstrate the unique advantage of high power density and high total power presented by Delta geometry.
Mixed Oxide-Ion And Carbonate-Ion Conductors (Moccs) As Electrolyte Materials For Solid Oxide Fuel Cells, Xue Li, Guoliang Xiao, Seung Min Lee, Kevin Huang
Mixed Oxide-Ion And Carbonate-Ion Conductors (Moccs) As Electrolyte Materials For Solid Oxide Fuel Cells, Xue Li, Guoliang Xiao, Seung Min Lee, Kevin Huang
Kevin Huang
A systematic investigation on the effective ionic conductivity (σm) of a novel intermediate temperature mixed oxide-ion and carbonate-ion conductor (MOCC) consisting of a ceria and a carbonate is reported. The study explicitly shows that the observed remarkable temperature-dependent σm is primarily the result of softening/melting of the carbonate phase as the physical state of the carbonate phase transforms from solid, softened to molten. DSC analysis complements the understanding of the observed electrical behavior by revealing temperatures of melting and solidification in agreement with the onset temperatures of σm. In addition, the measured σm agrees reasonably well with those simulated by …
Silver-Molten Carbonate Composite As A New High-Flux Membrane For Electrochemical Separation Of Co2 From Flue Gas, Nansheng Xu, Xue Li, Maxwell Franks, Hailei Zhao, Kevin Huang
Silver-Molten Carbonate Composite As A New High-Flux Membrane For Electrochemical Separation Of Co2 From Flue Gas, Nansheng Xu, Xue Li, Maxwell Franks, Hailei Zhao, Kevin Huang
Kevin Huang
No abstract provided.
High Co2 Permeation Flux Enabled By Highly Interconnected Three-Dimensional Ionic Channels In Selective Co2 Separation Membranes, Lingling Zhang, Nansheng Xu, Xue Li, Siwei Wang, Kevin Huang, William Harris, Wilson Chiu
High Co2 Permeation Flux Enabled By Highly Interconnected Three-Dimensional Ionic Channels In Selective Co2 Separation Membranes, Lingling Zhang, Nansheng Xu, Xue Li, Siwei Wang, Kevin Huang, William Harris, Wilson Chiu
Kevin Huang
Abatement of CO2 emissions from existing fossil-fueled power plants is currently the sole near-term solution to stabilize CO2 concentration in the atmosphere. Separation and capture of CO2from process streams of these power plants is the first step toward this effort. In this paper, we report a high flux membrane consisting of highly and efficiently interconnected three-dimensional ionic channels prepared from a combined “co-precipitation” and “sacrificial-template” synthesis. The membranes exhibit remarkable CO2 permeation characteristic, achieving a CO2 flux density two orders of magnitude higher than other similar systems reported in the literature. The experimental results also have an excellent agreement with …
Fuel Utilization And Fuel Sensitivity Of Solid Oxide Fuel Cells, Kevin Huang
Fuel Utilization And Fuel Sensitivity Of Solid Oxide Fuel Cells, Kevin Huang
Kevin Huang
No abstract provided.
Activity Of Bi2O3 In Bi2O3 Y2O3 Oxygen Ion Conductor, Kevin Huang, Changzhen Wang, Xiuguang Xu
Activity Of Bi2O3 In Bi2O3 Y2O3 Oxygen Ion Conductor, Kevin Huang, Changzhen Wang, Xiuguang Xu
Kevin Huang
No abstract provided.
Heat Conduction And Seebeck Effect In Oxygen Cell, Kevin Huang, Yuhua Xia, Qingguo Liu
Heat Conduction And Seebeck Effect In Oxygen Cell, Kevin Huang, Yuhua Xia, Qingguo Liu
Kevin Huang
No abstract provided.
A Reversible And Stable Flake-Like Licoo2 Cathode For Lithium Ion Batteries, Tao Wei, Rui Zeng, Yongming Sun, Yunhui Huang, Kevin Huang
A Reversible And Stable Flake-Like Licoo2 Cathode For Lithium Ion Batteries, Tao Wei, Rui Zeng, Yongming Sun, Yunhui Huang, Kevin Huang
Kevin Huang
A dense and thick flake-like cathode structure was demonstrated to have a preferential crystallographic orientation for Li+ migration and a better tolerance to cracking, both of which enable a reversible and stable capacity at moderate rates from 0.1 to 2 C.
Study Of A Renewable Biomass Powered Sofc, Yunhui Gong, Andrew Chien, Zhengping Mao, Kevin Huang
Study Of A Renewable Biomass Powered Sofc, Yunhui Gong, Andrew Chien, Zhengping Mao, Kevin Huang
Kevin Huang
The objective of this work is to explore a solution to utilize biomass carbon by a tubular solid oxide fuel cell integrated with an "in-situ" steam gasification reactor. Non-catalyzed and catalyzed coconut shell carbons were employed as solid fuels, which were directly converted to gaseous fuels to feed the SOFC operated at 800°. Single cells showed variable electrochemical performances according to the catalytic additives. Sample without catalysts exhibited low power density, while those with catalysts such as Fe2O3 and K2CO3 showed higher performances. The enhanced cell performance with catalysts was considered to be the …
Standard Gibbs Free Energy Of Formation Of Zros, Whi-Tong Sui, Xing-Yi Xiao, Kevin Huang, Chang-Zhen Wang
Standard Gibbs Free Energy Of Formation Of Zros, Whi-Tong Sui, Xing-Yi Xiao, Kevin Huang, Chang-Zhen Wang
Kevin Huang
No abstract provided.
Synthesis And Electrical Properties Of Dense Ce0.9Gd0.1O1.95 Ceramics, Kevin Huang, Man Feng, John Goodenough
Synthesis And Electrical Properties Of Dense Ce0.9Gd0.1O1.95 Ceramics, Kevin Huang, Man Feng, John Goodenough
Kevin Huang
No abstract provided.
A New Electrochemical Sensor For Rapid Determination Of Silicon Content In Carbon Saturate Iron, Kevin Huang, Weijiang Wu, Qingguo Liu
A New Electrochemical Sensor For Rapid Determination Of Silicon Content In Carbon Saturate Iron, Kevin Huang, Weijiang Wu, Qingguo Liu
Kevin Huang
No abstract provided.
Bi2O3-Y2O3-Ceo2 Solid Solution Oxide-Ion Electrolyte, Kevin Huang, Man Feng, John Goodenough
Bi2O3-Y2O3-Ceo2 Solid Solution Oxide-Ion Electrolyte, Kevin Huang, Man Feng, John Goodenough
Kevin Huang
No abstract provided.
The Diffusivity And Solubility Of Oxygen In Reference Electrodes Ni-Nio, Co-Coo, Fe-Feo And Mo-Moo2 Systems, Kevin Huang, Shaohua Tang, Qingguo Liu
The Diffusivity And Solubility Of Oxygen In Reference Electrodes Ni-Nio, Co-Coo, Fe-Feo And Mo-Moo2 Systems, Kevin Huang, Shaohua Tang, Qingguo Liu
Kevin Huang
No abstract provided.
Cyclic Durability Of A Solid Oxide Fe-Air Redox Battery Operated At 650°C, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
Cyclic Durability Of A Solid Oxide Fe-Air Redox Battery Operated At 650°C, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
Kevin Huang
The recently developed rechargeable solid oxide metal-air redox battery has shown a great potential for applications in mid- to large-scale stationary energy storage. Cyclic durability is one of the most important requirements for stationary energy storage. In this study, we report the cyclic durability of a solid oxide Fe-air redox battery operated at 650◦C. The battery was continuously cycled 100 times under a current density of 50 mA/cm2 with rather flat performance, producing an average specific energy of 760 Wh/kg-Fe at a round-trip efficiency of 55.5%. The post-test examination indicated that the performance losses could arise from the fuel-electrode of …
Effects Of Testing Configurations And Cell Geometries On The Performance Of A Sofc: A Modeling Approach, Daan Cui, Chenghao Yang, Kevin Huang, Fanglin Chen
Effects Of Testing Configurations And Cell Geometries On The Performance Of A Sofc: A Modeling Approach, Daan Cui, Chenghao Yang, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
Combustion-Assisted Co2 Capture Using Mecc Membranes, Steven Sherman, Joshua Gray, Kyle Brinkman, Kevin Huang
Combustion-Assisted Co2 Capture Using Mecc Membranes, Steven Sherman, Joshua Gray, Kyle Brinkman, Kevin Huang
Kevin Huang
No abstract provided.
Reduced Area Specific Resistance For Iron-Based Metallic Interconnects By Surface Oxide Coatings, Kevin Huang, Peggy Hou, John Goodenough
Reduced Area Specific Resistance For Iron-Based Metallic Interconnects By Surface Oxide Coatings, Kevin Huang, Peggy Hou, John Goodenough
Kevin Huang
No abstract provided.
Wet Chemical Synthesis Of Sr- And Mg-Doped Lagao3, A Perovskite-Type Oxide-Ion Conductor, Kevin Huang, John Goodenough
Wet Chemical Synthesis Of Sr- And Mg-Doped Lagao3, A Perovskite-Type Oxide-Ion Conductor, Kevin Huang, John Goodenough
Kevin Huang
No abstract provided.
Cathode Polarizations Of A Cathode-Supported Solid Oxide Fuel Cell, Kevin Huang, Alessandro Zampieri, Martin Ise
Cathode Polarizations Of A Cathode-Supported Solid Oxide Fuel Cell, Kevin Huang, Alessandro Zampieri, Martin Ise
Kevin Huang
The concentration, activation, and total polarizations of the cathode in a cathode-supported solid oxide fuel cell (SOFC) were theoretically and experimentally investigated. In the theoretical analysis, the exchange current density of the charge transfer was considered to be dependent on the PO2 determined by the preceding O2 diffusion, resulting in an interrelationship between activation and concentration polarizations. The established nonlinear polarization equations were then applied to solve the key parameters with area specific resistances and overpotentials of the polarizations experimentally measured by electrochemical impedance spectroscopy on an operating cathode-supported SOFC. To ensure the consistency and meaningfulness of the solutions, the …
One-Step Infiltration Of Mixed Conducting Electrocatalysts For Reducing Cathode Polarization Of A Commercial Cathode-Supported Sofc, Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang
One-Step Infiltration Of Mixed Conducting Electrocatalysts For Reducing Cathode Polarization Of A Commercial Cathode-Supported Sofc, Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang
Kevin Huang
Infiltrating fine-grained electrocatalyst particles of either ion conducting or mixed electron and ion conducting (MEIC) material into a ceramic porous electrode scaffold has proven a very effective way to improve electrode performance for low to intermediate temperature solid oxide fuel cells (SOFCs). We report here one-step infiltration of MEIC fine particles, La0.6Sr0.4CoO3-δ (LSCo) and SrCo0.8Fe0.2O3-δ (SCF), into a commercial cathode substrate. A comparative study shows that the cathode polarization can be considerably reduced by a factor of 17 to 28 and 28 to 49 from 1000 to 700 ³C by the infiltrated LSCF and SCF electrocatalysts, respectively, demonstrating an effective …
Performance Of Solid Oxide Iron-Air Battery Operated At 550°C, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
Performance Of Solid Oxide Iron-Air Battery Operated At 550°C, Xuan Zhao, Yunhui Gong, Xue Li, Nansheng Xu, Kevin Huang
Kevin Huang
“Metal-air” batteries have garnered much attention in recent years due to their high intrinsic specific energy and use of inexhaustible and storage-free oxygen source -air- for the “metal-oxygen” reaction. In this study, we report theperformance of a new type of all solid-state “iron-air” battery operated at 550°C. The results show that CeO2 nanoparticles incorporated into the Fe-Fe3O4 redox-couple can improve the specific energy (Wh/kg) and round trip efficiency by 15% and 29%, respectively, over the baseline Fe-Fe3O4 battery. Use of supported Fe-Fe3O4 nanoparticles as the redox couple can increase the specific energy and round-trip efficiency by 13% and 48% over …
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.