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This document provides contact information for Senta Wessels, an architect and technology expert. It lists her name, phone number, and email address. Senta Wessels can be reached at 079 522 0003 or wsenta@gmail.com regarding architectural and technology services.
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93 pooja
This document summarizes research on the electrical conductivity of Ba-Sr-Co-Fe cathode materials for solid oxide fuel cells (SOFCs). Single phase cubic Ba0.5Sr0.5Co1-xFexO3-δ compositions were synthesized via gel combustion and cation complexation routes. Electrical conductivity measurements showed that conductivity initially increased with temperature up to a maximum then decreased, attributed to oxygen loss from the lattice. Fe substitution had little effect on conductivity. While BSCF shows potential as an SOFC cathode, further work is needed to increase conductivity to meet requirements of current IT-SOFCs.
MASc Research work
The document discusses experiments on the stability of SOFC cathodes and the development of a novel test system. It focuses on studying the stability of a barium-based cathode material (La0.5Ba0.5CoO3-δ) when exposed to carbon dioxide through thermodynamic and kinetic analysis. The key reactions, pathways and kinetics of carbonate formation are examined through TGA and HT-XRD experiments. An equilibrium phase diagram is proposed. Additionally, a test system is developed to enable rapid testing of multiple electrodes through a materials printer and micro contact impedance spectroscopy. This allows reproducible fabrication and evaluation of many electrode compositions.
Design, analysis and controlling of an offshore load transfer system Dimuthu ...
MAS501 Control Theory2-Autumn 2013 Design, analysis and controlling of an offshore load transfer system Dimuthu Dharshana
Master Thesis SOFC
Solid Oxide Fuel Cell: Design improvements of the electrostatic spray deposition system and cell test station development.
Sofc
This document summarizes a presentation on solid electrolytes. It discusses how solid electrolytes exhibit ionic conductivity through mobile anions or cations, with maximum conductivity between 0.1-10 Ohm-1cm-1. Examples of solid electrolytes mentioned include AgI, β-alumina, and zirconia. Applications discussed include use in batteries, oxygen sensors, and solid oxide fuel cells. The proposed work is to synthesize and characterize Sr and Cu doped LaAlO3 as a potential solid electrolyte material.
Internship oral presentation
This document summarizes an internship project on synthesizing nanopowders for solid oxide fuel cell anodes using plasma spraying. The intern aimed to synthesize a pure nanostructured phase of lanthanum doped ceria using solution plasma spraying. Tests were also conducted to deposit a coating of lanthanum strontium titanate and yttria-stabilized zirconia on a thin disk using suspension plasma spraying. The intern obtained promising results for synthesizing lanthanum doped ceria powder but needs to improve the quality of the composite coating and overcome issues of thermal shock. Future work involves repeating ceria synthesis, developing a new substrate, and testing a lanthanum doped ceria, lanthan
Making anodes for solid oxide fuel cells Dimuthu Dharshana Kodippili Arachchige
Semester project under the module ENE401 Fuel Cell Technology-Autumn 2013, University of Agder, Grimstad, Norway
Quick DFT tour of Electron Energy Loss Spectrum (EELS)
Transmission electron microscopy (TEM) is important tools for surface and interface study. Electron Energy Loss Spectroscopy (EELS) belongs to the TEM family, I added some know-how about DFT simulation of EELS spectrum. I showed some tricks and caution which I found important. Please send me a note for questions and comments
Recommended
93 pooja
This document summarizes research on the electrical conductivity of Ba-Sr-Co-Fe cathode materials for solid oxide fuel cells (SOFCs). Single phase cubic Ba0.5Sr0.5Co1-xFexO3-δ compositions were synthesized via gel combustion and cation complexation routes. Electrical conductivity measurements showed that conductivity initially increased with temperature up to a maximum then decreased, attributed to oxygen loss from the lattice. Fe substitution had little effect on conductivity. While BSCF shows potential as an SOFC cathode, further work is needed to increase conductivity to meet requirements of current IT-SOFCs.
MASc Research work
The document discusses experiments on the stability of SOFC cathodes and the development of a novel test system. It focuses on studying the stability of a barium-based cathode material (La0.5Ba0.5CoO3-δ) when exposed to carbon dioxide through thermodynamic and kinetic analysis. The key reactions, pathways and kinetics of carbonate formation are examined through TGA and HT-XRD experiments. An equilibrium phase diagram is proposed. Additionally, a test system is developed to enable rapid testing of multiple electrodes through a materials printer and micro contact impedance spectroscopy. This allows reproducible fabrication and evaluation of many electrode compositions.
Design, analysis and controlling of an offshore load transfer system Dimuthu ...
MAS501 Control Theory2-Autumn 2013 Design, analysis and controlling of an offshore load transfer system Dimuthu Dharshana
Master Thesis SOFC
Solid Oxide Fuel Cell: Design improvements of the electrostatic spray deposition system and cell test station development.
Sofc
This document summarizes a presentation on solid electrolytes. It discusses how solid electrolytes exhibit ionic conductivity through mobile anions or cations, with maximum conductivity between 0.1-10 Ohm-1cm-1. Examples of solid electrolytes mentioned include AgI, β-alumina, and zirconia. Applications discussed include use in batteries, oxygen sensors, and solid oxide fuel cells. The proposed work is to synthesize and characterize Sr and Cu doped LaAlO3 as a potential solid electrolyte material.
Internship oral presentation
This document summarizes an internship project on synthesizing nanopowders for solid oxide fuel cell anodes using plasma spraying. The intern aimed to synthesize a pure nanostructured phase of lanthanum doped ceria using solution plasma spraying. Tests were also conducted to deposit a coating of lanthanum strontium titanate and yttria-stabilized zirconia on a thin disk using suspension plasma spraying. The intern obtained promising results for synthesizing lanthanum doped ceria powder but needs to improve the quality of the composite coating and overcome issues of thermal shock. Future work involves repeating ceria synthesis, developing a new substrate, and testing a lanthanum doped ceria, lanthan
Making anodes for solid oxide fuel cells Dimuthu Dharshana Kodippili Arachchige
Semester project under the module ENE401 Fuel Cell Technology-Autumn 2013, University of Agder, Grimstad, Norway
Quick DFT tour of Electron Energy Loss Spectrum (EELS)
Transmission electron microscopy (TEM) is important tools for surface and interface study. Electron Energy Loss Spectroscopy (EELS) belongs to the TEM family, I added some know-how about DFT simulation of EELS spectrum. I showed some tricks and caution which I found important. Please send me a note for questions and comments
SOFC perovskite- DFT work
In this work, I am showing a faithful atomistic process of estimating the oxygen migration energetics within BSCF, oxygen migration energy exhibit a strong dependence on different local atomic structures of this doped perovskites. In addition, DFT calculations exhibit the reason of cubic phase stability of this doped perovskite in variable oxygen concentration.
Solid Oxide Fuel Cells Presentation
Solid oxide fuel cells (SOFCs) use solid ceramic electrolytes to transport oxygen ions between the cathode and anode. They can operate on hydrogen or natural gas fuels from 700-1000°C. Perovskite materials are commonly used as electrodes or electrolytes due to their mixed ionic and electronic conductivity. SOFCs offer clean electricity generation but challenges remain in reducing costs and operating temperatures before widespread commercialization. Research is ongoing to develop new materials with improved performance at lower temperatures.
SOLID OXIDE FUEL CELLS
A solid oxide fuel cell (SOFC) works by using oxygen ions conducting through a solid ceramic electrolyte to generate electricity from hydrogen or other fuels. It consists of an anode and cathode separated by an electrolyte, and produces electricity through an electrochemical reaction without combustion. SOFCs operate at high temperatures between 1000-1800 degrees F, which allows them to use a wide variety of fuels. They are more efficient than traditional power generation and are being developed for applications such as stationary power plants, transportation, and residential use.
329 Kandavel
(1) The document discusses optimization of AB2-type alloy composition for improved hydrogen storage properties. (2) Testing of alloys with varying non-stoichiometry found that A1.05B2 alloy exhibited the best properties with a working capacity of 1.55 wt%, fast kinetics, and suitable thermodynamics. (3) Overall, modifying the chemical environment through non-stoichiometry was found to increase storage capacity by altering the size of interstitial sites.
Fuel Cells
Fuel cells provide a possible solution to issues with battery technologies by efficiently converting chemical energy from hydrogen into electricity. Fuel cells strip electrons from hydrogen molecules to produce electricity and then recombine the electrons and protons to form water. While fuel cells have benefits like higher efficiency and lower emissions than conventional power sources, challenges remain around developing hydrogen infrastructure and bringing down production costs.
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SOFC perovskite- DFT work
In this work, I am showing a faithful atomistic process of estimating the oxygen migration energetics within BSCF, oxygen migration energy exhibit a strong dependence on different local atomic structures of this doped perovskites. In addition, DFT calculations exhibit the reason of cubic phase stability of this doped perovskite in variable oxygen concentration.
Solid Oxide Fuel Cells Presentation
Solid oxide fuel cells (SOFCs) use solid ceramic electrolytes to transport oxygen ions between the cathode and anode. They can operate on hydrogen or natural gas fuels from 700-1000°C. Perovskite materials are commonly used as electrodes or electrolytes due to their mixed ionic and electronic conductivity. SOFCs offer clean electricity generation but challenges remain in reducing costs and operating temperatures before widespread commercialization. Research is ongoing to develop new materials with improved performance at lower temperatures.
SOLID OXIDE FUEL CELLS
A solid oxide fuel cell (SOFC) works by using oxygen ions conducting through a solid ceramic electrolyte to generate electricity from hydrogen or other fuels. It consists of an anode and cathode separated by an electrolyte, and produces electricity through an electrochemical reaction without combustion. SOFCs operate at high temperatures between 1000-1800 degrees F, which allows them to use a wide variety of fuels. They are more efficient than traditional power generation and are being developed for applications such as stationary power plants, transportation, and residential use.
329 Kandavel
(1) The document discusses optimization of AB2-type alloy composition for improved hydrogen storage properties. (2) Testing of alloys with varying non-stoichiometry found that A1.05B2 alloy exhibited the best properties with a working capacity of 1.55 wt%, fast kinetics, and suitable thermodynamics. (3) Overall, modifying the chemical environment through non-stoichiometry was found to increase storage capacity by altering the size of interstitial sites.
Fuel Cells
Fuel cells provide a possible solution to issues with battery technologies by efficiently converting chemical energy from hydrogen into electricity. Fuel cells strip electrons from hydrogen molecules to produce electricity and then recombine the electrons and protons to form water. While fuel cells have benefits like higher efficiency and lower emissions than conventional power sources, challenges remain around developing hydrogen infrastructure and bringing down production costs.
Free Download Powerpoint Slides
Powerpoint Search Engine has collection of slides related to specific topics. Write the required keyword in the search box and it fetches you the related results.
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Huis Grobler Power Point
- 1. By Senta Wessels Architect Technology 079 522 0003 wsenta@gmail.com
- 22. Proudly presented by: Senta Wessels Architect Technology 079 522 0003 wsenta@gmail.com