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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Proton conducting"”.
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Synthesis and Characterization of Anhydrous Proton Conducting Polymer Electrolytes for Fuel Cell Applications
Anhydrous H+ ion conducting and high temperature capability of polymer electrolytes are being investigated for use in applications such as batteries, fuel cells, electro chromic windows and light emitting devices. Fuel cells are efficient electrochemical energy conversion devices; they can generate …
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Synthesis and characterisation of proton conducting membranes for direct methanol fuel cell (DMFC) applications
For a direct methanol fuel cell (DMFC), the proton exchange membrane must conduct protons and be a good methanol barrier. In addition to the high methanol permeability achieved by these membranes, they are very expensive and contribute greatly to theoverall cost of fuel cell set up. The high cost …
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Synthesis and characterisation of proton conducting composite materials resilient to dehydration at elevated temperatures
… any membrane that relies on water to transport protons will dehydrate and thus, the proton conductivity of the membrane will start to degrade. Here the development of a new proton conducting material that is resilient to dehydration is presented. The exploitation of the oxide surface of the ca. …
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A multiscale model for the oxide ion conducting and proton conducting solid oxide cells
… We apply the methodology to both the oxide ion-conducting SOCs as well as the proton-conducting SOCs. The proposed multiscale model yields quantitative agreement with the voltage loss-current density data from experiments. The results indicate that as to the oxygen electrode reactions in the …
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Steam Electrolysis Coupled with CO2 Conversion in a Pressurized Proton Conducting Solid Oxide Electrolysis Cell
Development of proton conducting solid oxide electrolysis cells (H-SOECs) for steam electrolysis coupled with the conversion of CO2 into fuels is a promising strategy for mitigating global warming. The aim of this research was to design and test a pressurized H-SOEC with an active Fischer-Tropsch …
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Structural and electrochemical characterization of two proton conducting oxide thin films for a microfabricated solid oxide fuel cell
The use of proton conducting oxide materials as an electrolyte offers the potential to reduce the operating temperature of a solid oxide fuel cell (SOFC), leading to improved thermal management and material compatibility. However, many proton conducting materials have not yet been investigated for …
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Thermodynamic analysis of ammonia and urea fed solid oxide fuel cells
… with the thermodynamic analyses of ion and proton-conducting solid oxide fuel cells (SOFC) fed with ammonia and urea as fuels. A multi-level approach was used to determine the feasibility and the performance of the fuel cells. First, the cell-level thermodynamics were examined to capture the …
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Design of Advanced Materials With Novel Microstructural Features
The third project illustrated the preparation of proton-conducting composite membranes for fuel cells. Composite membranes were prepared by solution blending sulfonated poly (ether ether ketone) and polyacrylonitrile in DMF and heating under nitrogen at 380 °C. This novel system offered a …
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Nano-scale Glucose Fuel Cells for Energy Harvesting in the Human Body Based on Proton Conduction in Cerium Oxide
… glucose fuel cell to date. By use of the ceramic proton-conducting electrolyte ceria and a free-standing membrane device architecture, the novel ceramic-electrolyte glucose fuel cell can be scaled down to a thickness below 400 nm. The ceramic-electrolyte glucose fuel cell is biocompatible by …
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Polymer electrolyte membranes for direct methanol fuel cells
This thesis study is aimed at producing proton-conducting polymer electrolyte membranes (PEMs) for direct methanol fuel cells (DMFCs). In this thesis, relatively inexpensive monomers, 2-acrylamido-2-methyl propanesulfonic acid (AMPS) and 3-sulfopropyl methacrylate (SPM) in particular, were deployed …
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Tailoring Perovskite- and Fluorite-Type Oxides for Solid Oxide Fuel Cells (SOFCs)
… (0 < x < 0.5; y = 0, 0.1, 0.15; z = 0.1, 0.2) proton conducting electrolyte was evaluated. Excellent chemical stability under water vapor for 24 h at 90 ºC was observed for all compositions. The electrical conductivity measurements under dry and humid atmospheres revealed the proton …
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Materials and coatings derived from the polymerizable ionic liquid surfactants 1-(2-acryloyloxyundecyl)-3-methylimidazolium tetrafluoroborate and 1-(2-acryloyloxyundecyl)-3-methylimidazolium 2-acrylamido-2-methyl-propylsulfonate
… preparations suitable for chemFETs, for proton conducting polymer electrolyte membranes (PEM) suitable for fuel cell fabrication, and for lithium ion and silver ion conducting membranes suitable for fast ionic conducting batteries.</p>
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Porous Silicon Membrane Based Formic Acid Fuel Cells for Micro Power Generation
… porous silicon is demonstrated to be a novel proton conducting membrane material for implementation of micro silicon fuel cells. With 5 M formic acid plus 0.5 M sulfuric acid as the fuel, the micro fuel cell based on a p-type porous silicon membrane produces peak power density about 30 mW/cm2 …
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Development and analysis of a high temperature electrolyser for the Cu-Cl cycle for hydrogen production
… (a solid oxide electrolyser based on proton conducting electrolyte). The developed model includes all the major losses namely activation, concentration and ohmic losses. Furthermore, energy and exergy analyses are also carried out. The value of energy and exergy efficiencies of the …
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Efforts Towards Micro Fuel Cells
… part of this work, we developed a new class of proton conductors based on nanoporous silicon. Proton conducting electrolytes are crucial components in fuel cells. However, the implementation of prevalent polymer electrolyte membranes leads to difficulties in manufacturing the fuel cell structure …
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Cesium hydrogen sulphate and cesium dihydrogen phosphate based solid composite electrolyte for fuel cell application
… was developed, with CsHSO4 and CsH2PO4 as the proton conducting material in composition with PTFE and SiO2 to enhance the solid electrolyte composites mechanical strength and conductivity. Conductivity measurements for CsHSO4 and CsH2PO4 and composites thereof, in temperature ranges 0 to 180 oC …
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Synthesis and Characterization of Hydrophilic-Hydrophobic Disulfonated Poly(Arylene Ether Sulfone)-Decafluoro Biphenyl Based Poly(Arylene Ether) Multiblock Copolymers for Proton Exchange Membranes (PEMs)
Hydrophilic/hydrophobic block copolymers as proton exchange membranes (PEMs) has become an emerging area of research in recent years. Three series of hydrophilic/hydrophobic, fluorinated/sulfonated multiblock copolymers were synthesized and characterized in this thesis. These copolymers were …
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CERAMIC MATERIALS USED IN SOLID-OXIDE FUEL CELLS
… cerate (BaCeO3) is a candidate material for proton conducting electrode in SOFC and other solid-state ionic devices. In this thesis, the crystalline BaCeO3 has been successfully synthesized using hydrothermal route by hexamethylenetetramine (HMTA). The crystal structure, surface and grain …
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Gold Nanoshells: Synthesis and Applications to In Situ SERS
… and efficiency of catalysts, as well as the proton conducting mechanism. It is significant to design a new SERS active electrode with an excellent enhancement and good uniformity, so that rich vibrational information of Nafion adsorbed on Pt catalysts can be obtained. In this dissertation, …
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