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.
Results
Showing 1 to 20 of 46 for “"Electrochemical Stability"”.
-
Studies on Chemical and Electrochemical Stability of Li-stuffed Garnets for Next Generation Lithium Batteries
… a very promising electrolyte due to their wide electrochemical window (> 6 V vs. Li/Li+), chemical stability against metallic Li, and high ionic conductivity (~ 1 mS cm-1) at room temperature. Even with these attributes, there is a lack of understanding towards the stability of Li-stuffed …
-
Electrolytic remediation of chromated copper arsenate wastes
… this process. The specific approach focused on electrochemical stability analysis of the metals; development and testing of a copper sulfate reference electrode (CSE); electrolytic deposition of arsenic, chromium, and copper from model aqueous CCA wastes; and characterization of the resulting …
-
Critical current density in hot-pressed garnet Li7La3Zr2O12 solid state electrolytes
… </sub>has high chemical and electrochemical stability with lithium metal, its shear moduli is also higher than most membrane materials, so it is one of the most promising solid state electrolyte materials. However, there are still dendrites penetrating under a small current …
-
Investigation of high-performance lithium-ion batteries based on highly conductive Li7La3Zr2O12 solid-state electrolyte and stable electrode-electrolyte interface
… Li+ conductivity, wide potential window, and electrochemical stability against metallic lithium anode (the highest theoretical capacity: 3,860 mAh g−1), cubic phase garnet-type Li7La3Zr2O12 (LLZO) solid-state electrolyte has attracted much attention for developing solid-state batteries with …
-
Synthesis and Characterization of Methylammonium Strontium Bromide Hybrid Perovskite
… confirmed using XRD and SEM-EDX. We explored the stability of the MASrBr3 thin films in three solvents and the electrochemical stability of MASrBr3 in an ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. From this study, we observed that MASrBr3 was stable from -1.75 V …
-
AQUEOUS REDOX FLOW CELLS FOR LARGE-SCALE ENERGY STORAGE AND CONVERSION
… the energy density of ARFCs is limited by the electrochemical stability window of water and the solubility of the active species. In order to enhance the energy storage capability of ARFCs, new battery chemistry such as polyoxometalate – cerium system is demonstrated in the thesis to expand the …
-
Development of Electrolyte Salts for Multivalent Ion Batteries
This dissertation focuses on the synthesis and electrochemical testing of new electrolyte salts for rechargeable multivalent ion batteries. In chapters 2 and 3 the synthesis of Mg and Ca hexafluoropnictogenate salts as well as the electrochemical behaviour of Mg(PF6)2 is presented. Pure samples of …
-
Understanding and Improving Electrode|Polymer Electrolyte Interfaces for High-Voltage Lithium Metal Batteries
… SEs with high ionic conductivity, wide electrochemical stability window (ESW), and suitable mechanical properties, critical challenges remain in understanding the complex phenomena occurring at electrode|electrolyte interfaces, where electrochemical reactions take place and ultimately …
-
ATOMIC LAYER DEPOSITION OF ALKALI PHOSPHORUS OXYNITRIDE ELECTROLYTES FOR BEYOND-LITHIUM NANOSCALE BATTERIES
… A comprehensive comparison of the structure, electrochemical, and processing parameters between the APON (A = Li, Na, K) family of materials is presented. The structure of NaPON closely resembles that of ALD LiPON, both possessing a N/P of 1, classifying them as alkali polyphosphazenes. …
-
Syntheseses [sic] and evaluation of porphyrin derivatives for applications in medicine and in material science
… to form polymers with extremely high thermal and electrochemical stability. Chapter 5 introduces oxacalixarene as a novel spacer to efficiently build cofacial bisporphyrins and higher oligomers. This is a general method to build a variety of cofacial architectures. The spectroscopic and structural …
-
In-situ Polymerization of Methacrylate based Solid Polymer Electrolyte for Solid State Lithium-ion Batteries
… have been performed to understand thermal and electrochemical stability of the SPE. Systematic studies have been performed to investigate the evolution of resistance and stability of the solid electrolyte interphase (SEI) in contact with electrodes. Finally, the long-term cycling and rate …
-
Synthesis and electrochemical studies of novel ionic liquid based electrolytes
… non-flammability, wide liquid range, and thermal stability characteristics. Towards developing a new generation of high specific energy lithium ion batteries, a series of imidazolium and pyrrolidinium based ionic liquids were synthesized and explored as nonaqueous electrolytes in lithium-, lithium …
-
Study of TaC Supported Ir-Based Oxygen Evolution Reaction Electrocatalysts Synthesized by Surfactant-Mediated Method
The physical and electrochemical properties of Tantalum carbide (TaC) as a potential support for oxygen evolution reaction (OER) electrocatalysts were investigated. It was first ball milled for 7 and 14 days in order to decrease the particle size and increase the surface area. The larger the …
-
The Electroreduction of Carbon Dioxide on Porous Copper Nanoparticles
… solution (KHCO3) at atmospheric pressure. The electrochemical stability of these nanoparticles was tested via bulk electrolysis for one hour at -1.2, -1.6, and -2.2 V vs. Ag/AgCl in kinetic and diffusion limited regimes. All nanoparticles exhibited activity towards CER and displayed excellent …
-
Acetate-based Electrolytes for Aqueous Zinc-ion Batteries: An Investigation of the Zinc Anode
… their deployment is limited by water’s narrow electrochemical stability window, parasitic gas evolution, and poor Zn utilization in conventional alkaline electrolytes. This dissertation investigates acetate-based aqueous electrolytes—both highly concentrated “water-in-salt” (WiSE) formulations …
-
Aqueous Polysulfide Electrodes for Low-Cost Grid-Scale Energy Storage
… as a redox flow electrolyte: species chemical stability and solubility limit. Even in highly alkaline environments, aqueous polysulfide is found to only exhibit chemical stability in the confined range of oxidation states between S₄²⁻ and S₂²⁻, corresponding to a quarter of the theoretical …
-
A multi-functional electrolyte for lithium-ion batteries
… In the first phase of the study, the baseline electrochemical performance of the MFE is determined by conductivity, electrochemical stability window, half and full cell cycling with lithium iron phosphate (LiFePO4), lithium titanate oxide (Li4Ti5O12), and copper antimonide (Cu2Sb), and …
-
DNA Biosensors Based on Gold-Coated Magnetic Nanoparticles
… chips, therapeutic devices, and DNA biosensors. Electrochemical transduction provides a convenient means for studying DNA hybridization due to its simplicity and compatibility with point-of-care diagnostic devices. One challenge in electrochemical biosensors is how to detect ultra-low levels of …
-
Preparation characterisation and evaluation of core shell electrocatalysts for PEMFCs
… required for a catalyst to show long-term stability as well as<br/>improved activity.<br/><br/>Chapter 1 introduces the PEM fuel cells, ORR electrocatalysts and the preparation and<br/>characterisation of core-shell type electrocatalysts. The experimental techniques,<br/>procedures and …
-
Preparation, characterisation and evaluation of core-shell electrocatalyst for PEMFCs
… required for a catalyst to show long-term stability as well as<br/>improved activity.<br/><br/>Chapter 1 introduces the PEM fuel cells, ORR electrocatalysts and the preparation and<br/>characterisation of core-shell type electrocatalysts. The experimental techniques,<br/>procedures and …
Page 1 of 3