Global ETD Search
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 17 of 17 for “"Organic Electrolytes"”.
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Towards more stable and ion-conductive organic electrolytes for rechargeable batteries
… source. Enhancing the functionality of battery electrolytes, such as (electro)chemical stability and ion conductivity, can improve battery energy density, operation efficiency, and safety. This thesis explores strategies to improve the stability and ion conductivity of organic electrolytes for …
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Multiscale Transport and Dynamics in Ion-Dense Organic Electrolytes and Copolymer Micelles
… on a series of ion-conducting materials: an organic ionic plastic crystal, a proton-exchange membrane, and a polymer-gel electrolyte. These studies show the dependencies of small molecule and ion transport on modulations to material parameters, including thermal or magnetic treatment, water …
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Electrolyte Dependence on the Electrochemical and Optoelectronic Activity of a Conjugated Polymer in Organic Solvents
<p>Organic electronic devices rely on the redox and charge transport properties of conjugated polymers. Many high-performance electroactive polymers are hydrophobic and require processing in organic solvents. As such, these materials are characterized in nonaqueous electrolyte systems to evaluate …
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Ab-initio simulation of novel solid electrolytes
… to some of the problems facing conventional organic electrolytes in Li and Na-ion batteries, but typically conductivities are very low. Reports of fast lithium conduction in Li 0GeP 2S1 2 (LGPS), with conductivity of 12 mS/cm at room temperature, have shown that Li -diffusion in solid …
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Modeling of electrical behavior of graphene-based ultracapacitors
… capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively. In addition, high electrical conductivity gives these materials consistently good performance over a wide range of voltage scan rates. This paper reports a modeling methodology to predict the electrical behavior …
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In-situ Polymerization of Methacrylate based Solid Polymer Electrolyte for Solid State Lithium-ion Batteries
… pose a safety hazard due to the use of flammable organic electrolytes with high vapor pressure. Solid state batteries (SSB) may become a solution to this problem if they mitigate the flammability issue and offer sufficiently high energy and power densities required for applications in the electric …
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Understanding and Improving Zinc Anodes for High-Energy Rechargeable Alkaline Batteries
Batteries with aqueous electrolytes generally feature better intrinsic safety, higher ionic conductivity and lower cost compared with flammable organic electrolytes. Metallic zinc as a rechargeable anode material for aqueous batteries has gained tremendous attention with merits of intrinsic safety, …
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Investigating the interfacial process and bulk electrode chemistry in tungsten oxide electrochromic materials
… diverse crystal structures in most aqueous and organic electrolytes. The charge transfer process mainly occurs at the electrode-electrolyte interface, and controlling the electrochemical interfacial stability represents a key challenge in developing sustainable and cost-effective electrochromic …
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Development of New Cathodic Interlayers with Nano-Architectures for Lithium-Sulfur Batteries
… and diffusion of polysulfides in liquid organic electrolytes hinder the advance of lithium–sulfur (Li-S) batteries for next generation energy storage. To trap and re-utilize the polysulfides, brush-like, zinc oxide (ZnO) nanowires based interlayers were prepared ex-situ using a wet …
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Supramolecular effects in pyridinium compounds and their application towards practical redox flow battery systems
Aqueous-organic redox flow batteries (AORFBs) have emerged as a promising technology class for stationary energy storage. To date, however, synthetic strategies for organic electrolytes have emphasised molecular complexity as a means of targeting desired performance characteristics. Consequently, …
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BIOFUNCTIONALIZATION ON HYDROGEN-TERMINATED SILICON(111) SURFACES
… involved in our research were: 1) improvement of organic film passivation apparatus for high quality film formation to prevent oxidation of underlying bulk silicon; 2) development of easily reproducible acetylenylated base layer on silicon surfaces for convenient introduction of organic moieties; …
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Development of electrochemical detection for capillary electrophoreses
… parameters investigated included adsorption of organic electrolytes, deposition of metal ions, and H$\sp+$ and O2 reactions. The results showed that the adsorption of organic compounds and deposition of some metals changed the electrode surface, which caused changes of electrochemical …
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Polythiophene als sensitive Filme in chemischen Sensoren
… (PEDOT) for ion detection in aqueous electrolytes. The advanced electrochemical quartz crystal microbalance was used for investigating the electrochemical polymerisation and the redox cycling behaviour of the polymer films deposited on the liquid facing electrode of the quartz. This …
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Ab initio investigations of solid electrolytes for lithium- and Sodium-ion batteries
Solid-state electrolytes have the potential to dramatically improve the safety and longevity of state-of-the-art battery technology by replacing the flammable organic electrolytes currently employed in Li-ion batteries. Recent advances in the development of new thiophosphate electrolytes have …
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Development and application of the CL&Pol polarisable force field for ionic liquid-based electrolytes
… systems, replacing traditional volatile organic electrolytes. The appeal of ILs for such applications lies in the favourable properties, such as high diffusivity, thermal and electrochemical stability, and low volatility. Molecular dynamics (MD) simulation is a powerful tool for studying …
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A Study of Novel Nitrogen-Containing Quinoidal Electrolytes for Redox Flow Batteries
… costs stymy such systems. For this reason, novel electrolytes are under active development. Previous electrolytes have involved a variety of metal-containing and organic systems. Organic systems can offer fast kinetics, high tunability and low cost. In this thesis, novel quinone derivatives were …
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Assessment of graphene-related materials in supercapacitors
… capacitance of most of them in aqueous and organic electrolytes compares with those of activated carbons and other porous carbons with specific surface area around 1000 m2 g-1. Besides, graphite oxides may achieve much higher volumetric capacitance, which is a key factor for the development …