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Tesi sul tema "Electrolytes"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Van, Heerden D. P. "Degradation of the beta-alumina electrolyte in a zebra cell." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/17666.

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Bibliography: pages 103-106.<br>Beta-alumina solid electrolytes studied were subjected to charge and discharge cycles in a secondary, high energy density Na/beta-alumina/NaAlCl₄/FeCl₂ cell (known as the Zebra cell) at 250⁰ C. These electrolytes were studied by means of optical microscopy, as well as SEM and EDS analyses to est ablish possible failure modes. After cycling little discolouration, or impurity pickup was found to have occurred in the electrolyte. The forms of degradation of the beta-alumina electrolyte identified appeared to be a result of inherent flaws in the beta-alumina electro

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2

Sorrie, Graham A. "Liquid polymer electrolytes." Thesis, University of Aberdeen, 1987. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU499826.

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This thesis is concerned with ion-ion and ion-polymer interactions over a wide concentration range in polymer electrolytes with a view to shedding new light on the mechanism of ion migration. Additionally, the electrochemical stability window of these electrolytes on platinum and vitreous carbon electrodes has been thoroughly investigated. The final part of this thesis is concerned with determining the feasibility of polymer electrolytes as electrolytes in a new type of energy storage device, a double layer capacitor which incorporates activated carbon cloth electrodes. Conductivities and visc

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3

Stuart, Paul Anthony. "The synthesis and evaluation of proton conducting electrolytes for high temperature steam electrolysers." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5571.

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Proton conducting ceramics based on acceptor doped perovskites are the subject of investigation as candidate electrolyte materials for Solid Oxide Electrolyser Cells (SOECs). Specifically, BaCe0.9Y0.1O3-[delta](BCY10) and BaZr0.9Y0.1O3-[delta](BZY10) were investigated. Samples with greater than 95% of the maximum theoretical density were successfully prepared using a BCY10 commercial powder. It was found that when small additions of ZnO were added to a BZY10 commercial powder, a density of greater than 95% of the theoretical maximum was achievable whereas without ZnO addition, the maximum achi

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4

McLennaghan, A. W. "Linear segmented polyurethane electrolytes." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382418.

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5

Klein, Jeffrey M. "Electrode-Electrolyte and Solvent-Solute Interfaces of Concentrated Electrolytes: Ionic Liquids and Deep Eutectic Solvents." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1620213066452923.

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6

Wauters, Cary N. "Electrolytic membrane recovery of bromine from waste gas-phase hydrogen bromide streams using a molten salt electrolyte." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/10131.

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7

Zhao, Xin. "Electropolishing of Niobium in Sulfuric Acid-Methanol Electrolytes: Development of Hydrofluoric Acid-Free Electrolytes." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/28507.

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Niobium (Nb) has the highest superconducting transition temperature (9.2 K) of the pure metals, which makes it the most used material for the construction of superconducting radio frequency (SRF) accelerators. The performance of the accelerator is critically dependent upon the quality of Nb surface. Electropolishing (EP) in hydrofluoric acid (HF)-containing electrolytes is the currently accepted treatment process. The presence of HF is necessary for the removal of the passive oxide surface film formed in aqueous electrolytes. But HF is hazardous and must be contained without human exposure and

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8

Schlindwein, Walkiria Santos. "Conducting polymers and polymer electrolytes." Thesis, University of Leicester, 1990. http://hdl.handle.net/2381/33889.

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Polymers are mostly used as insulator materials. Since the late sixties, two new classes of polymeric materials possessing either ionic or electronic conductivities have been extensively studied. The work carried out in this thesis concerns of the study of polymer electrolytes based on poly(ethylene oxide) (PEO) complexed with divalent salts (ionic conductors) and polypyrroles (PPy) electrochemically and chemically prepared (electronic conductors). Different techniques were used to study their properties including Differential Scanning Calorimetry (DSC), Variable Temperature Polarising Microsc

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9

Edwards, William. "Structural Dynamics in Novel Electrolytes." Thesis, University of Kent, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499827.

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10

Worboys, M. R. "Ionic transport in polyether electrolytes." Thesis, University of Kent, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353186.

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11

Clarke, M. D. "Electrochemical studies on polymeric electrolytes." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373076.

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12

Ismail, Iqbal M. I. "Electrochemical studies of polymer electrolytes." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242319.

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13

Mills, Glen E. "Computer modelling of polymer electrolytes." Thesis, Keele University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242281.

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14

Chae, Jung Hoon. "Supercapacitors with neutral aqueous electrolytes." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/30936/.

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Fossil fuels, which are the main energy sources of the current world, are running low and alternative ways of generating and storing different types of energies are becoming daunting missions. Renewable energy is very attractive because the source of the energy is often free and also environmentally friendly. The key issue to utilise the renewable energies in sustainable manner is how effectively store the energies and provide them on demand. Therefore, the significance of the energy storage devices has been widely recognised in recent time. Electrochemical capacitors (ECs), which are also com

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15

Maranski, Krzysztof Jerzy. "Polymer electrolytes : synthesis and characterisation." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3411.

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Crystalline polymer/salt complexes can conduct, in contrast to the view held for 30 years. The alpha-phase of the crystalline poly(ethylene oxide)₆:LiPF₆ is composed of tunnels formed from pairs of (CH₂-CH₂-O)ₓ chains, within which the Li⁺ ions reside and along which the latter migrate.¹ When a polydispersed polymer is used, the tunnels are composed of 2 strands, each built from a string of PEO chains of varying length. It has been suggested that the number and the arrangement of the chain ends within the tunnels affects the ionic conductivity.² Using polymers with uniform chain length is impo

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16

Mehta, Mary Anne. "Multivalent ions in polymer electrolytes." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/15517.

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The electrochemical, thermal and structural properties of polyethylene oxide (PEO) based polymer electrolytes containing multivalent ions were investigated. The phase diagram for the PEO:Ca(CF3SO3)2 system was determined by x-ray diffraction and differential scanning calorimetry techniques. Precipitation of the salt from the system at high temperatures was directly observed by variable temperature x- ray diffraction. This was ascribed to a negative entropy of dissolution of the salt in the polymer. A new crystalline complex PEO6Ca(CF3SO3)2, which exhibits a phase transition between two polymor

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17

Shi, Jie. "Ion transport in polymer electrolytes." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/15522.

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The ion-polymer and ion-ion interactions in polymer electrolytes based on high molecular weight, amorphous methoxy-linked PEO (PMEO) and lithium salts have been investigated by conductivity measurement, magic-angle spinning NMR (mas NMR) and pulsed field gradient NMR (pfgNMR) techniques. In the very dilute salt concentration region, ion pairing effects are dominant in these polymer electrolytes. Ion association is found to increase with temperature and salt concentration. Ion transport for these electrolytes is controlled both by segmental motion of the polymer and activation process, in which

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18

Lu, Xiaopeng [Verfasser]. "Plasma Electrolytic Oxidation (PEO) Coatings on a Mg Alloy from Particle Containing Electrolytes / Xiaopeng Lu." Kiel : Universitätsbibliothek Kiel, 2017. http://d-nb.info/1128149206/34.

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19

Ralph, James Michael. "A study of doped ceria electrolytes." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/7782.

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20

Lee, Ming Ripman, and 李明. "Monte Carlo simulation for confined electrolytes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31240513.

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21

Al-Mudaris, A. A. M. "Ionic transport in model polymer electrolytes." Thesis, University of Kent, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235984.

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22

Inkster, Rachel T. "Liquid crystalline side chain polymer electrolytes." Thesis, University of Aberdeen, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419840.

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Ion transport in polymer electrolytes is, in general, strongly coupled to the segmental motions of the host polymer. Thus, ionic conductivity is not usually observed below the glass transition. Recent research has highlighted examples of polymer electrolytes in which the ionic conductivity is not coupled to the polymeric motions. This thesis investigates one such group of polymers: namely, liquid-crystalline side-chain polymers. The aim is to investigate the effect of different liquid crystal morphologies and to gain insight into the ion transport mechanism. The thermal, mechanical and el

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23

Sahota, Tarsem Singh. "Polymer electrolytes for iontophoretic drug delivery." Thesis, De Montfort University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391690.

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24

Modiba, Portia. "Electrolytes for redox flow battery systems." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/3999.

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Thesis (PhD (Chemistry and Polymer Science))--University of Stellenbosch, 2010.<br>Electrochemical behaviour of Ce, Fe, Cr,V and Mn in the presence of DTPA, EDTA, EDDS, NTA ligands were investigated by using cyclic voltammetry, a rotating disc electrode and electrochemical impedance spectroscopy for use in redox flow battery (RFB) systems. RFB is currently used for energy storage, the vanadium, which is used in most of the RFB’s, however suffers from species crossover and sluggish reactions, which limit the lifetime of the battery. These various ligands and metal complexes mentioned above

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25

Ainsworth, David A. "Crystalline polymer and small molecule electrolytes." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/2156.

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The research presented in this thesis includes a detailed investigation into factors influencing ionic conductivity in the crystalline polymer electrolyte PEO₆:LiPF₆. It has previously been shown that preparing PEO₆:LiPF₆ with PEO modified with larger –OC₂H₅ end groups increases ionic conductivity by one order of magnitude [¹],primarily due to disruption of the crystal structure caused by the inclusion of the larger end groups. In this study it is shown that by reducing PEO molecular weight in crystalline PEO₆:LiPF₆ ionic conductivity is also increased. This was attributed to an increasing con

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26

YANG, YONGRUI. "Flexible Supercapacitors with Novel Gel Electrolytes." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1590682495188219.

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27

Sylla, Salime. "Electrolytes polymères à conduction unipolaire cationique." Grenoble INPG, 1992. http://www.theses.fr/1992INPG0021.

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Un nouveau sel de lithium a anion perfluorosulfonate a ete prepare et caracterise au cours de cette etude. Les analyses electrochimiques de complexes prepares par dissolution de ce sel dans des homo et copolymeres d'oxyde d'ethylene ont permis de s'assurer que ceux-ci presentaient des conductivites legerement superieures a celles des complexes prepares avec des perchlorate et triflate de lithium et une bonne stabilite electrochimique. Ce sel presentant de surcroit des insaturations a ete copolymerise avec un macronomere, conduisant a des copolymeres lineaires, et avec les doubles liaisons ally

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28

Harvie, James L. "The electrochemistry of liquid polymer electrolytes." Thesis, University of Aberdeen, 1988. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU020268.

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This thesis is concerned with ion-ion and ion-polymer interactions in liquid polymer electrolytes (LPE's). LPE's are useful analogues of visco-elastic polymer electrolytes (VEPE's) which might be used in high energy density batteries. The LPE's investigated comprise alkali metal salts dissolved in polyethers. Two types of polyether are studied, liquid copolymers of ethylene oxide (EO) and propylene oxide (PO), and poly(propylene oxide) (PPO). Separation of an EO-rich phase at low temperature or,for some iodide salt solutions, precipitation of the salt at high temperature, are two phenomena fou

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29

Lee, Ming Ripman. "Monte Carlo simulation for confined electrolytes /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22055009.

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30

Almeida, Carlos Manuel Rodrigues de. "Optimization of Li-ion solid electrolytes." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/15803.

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Mestrado em Sistemas Energéticos Sustentáveis<br>The synthesis and optimization of two Li-ion solid electrolytes were studied in this work. Different combinations of precursors were used to prepare La0.5Li0.5TiO3 via mechanosynthesis. Despite the ability to form a perovskite phase by the mechanochemical reaction it was not possible to obtain a pure La0.5Li0.5TiO3 phase by this process. Of all the seven combinations of precursors and conditions tested, the one where La2O3, Li2CO3 and TiO2 were milled for 480min (LaOLiCO-480) showed the best results, with trace impurity phases still being observ

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31

Soares, Helena Sofia Marques Pinto. "Electrolytes for ceramic oxide fuel cells." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15883.

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Doutoramento em Nanociências e Nanotecnologia<br>The main objective of this dissertation is the development and processing of novel ionic conducting ceramic materials for use as electrolytes in proton or oxide-ion conducting solid oxide fuel cells. The research aims to develop new processing routes and/or materials offering superior electrochemical behavior, based on nanometric ceramic oxide powders prepared by mechanochemical processes. Protonic ceramic fuel cells (PCFCs) require electrolyte materials with high proton conductivity at intermediate temperatures, 500-700ºC, such as reported for

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32

Webster, Mark Ian. "Molecular motion in polymer electrolytes : an investigation of methods for improving the conductivity of solid polymer electrolytes." Thesis, University of Kent, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269150.

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33

zhang, peilun. "Zn Corrosion in Alkaline Aqueous Electrolytes: Effect of Electrolyte Composition on Corrosion Rate and Inhibitors to Suppress Corrosion." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1618400150411797.

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34

Gamstedt, Heléne. "Ionic Liquid Electrolytes for Photoelectrochemical Solar Cells." Doctoral thesis, KTH, Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-426.

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<p>Potential electrolytes for dye-sensitized photoelectrochemical solar cells have been synthesized and their applicability has been investigated. Different experimental techniques were used in order to characterize the synthesized electrolytes, such as elemental analysis, electrospray ionisation/mass spectrometry, cyclic voltammetry, dynamic viscosity measurements, as well as impedance, Raman and NMR spectroscopy. Some crystal structures were characterized by using single crystal X-ray diffraction.</p><p>In order to verify the eligibility of the ionic compounds as electrolytes for photoelectr

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35

Sivertsen, Edvard. "Membrane Separation of Anions in Concentrated Electrolytes." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2100.

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36

Liivat, Anti. "Ordering in Crystalline Short-Chain Polymer Electrolytes." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7853.

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37

Gamstedt, Heléne. "Ionic liquid electrolytes for photoelectrochemical solar cells /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-426.

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38

Brandell, Daniel. "Understanding Ionic Conductivity in Crystalline Polymer Electrolytes." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5734.

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39

Flake, John Christopher. "Photoelectrochemical etching of silicon in nonaqeous electrolytes." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/13278.

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40

Bayrak, Pehlivan İlknur. "Functionalization of polymer electrolytes for electrochromic windows." Doctoral thesis, Uppsala universitet, Fasta tillståndets fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204437.

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Saving energy in buildings is of great importance because about 30 to 40 % of the energy in the world is used in buildings. An electrochromic window (ECW), which makes it possible to regulate the inflow of visible light and solar energy into buildings, is a promising technology providing a reduction in energy consumption in buildings along with indoor comfort. A polymer electrolyte is positioned at the center of multi-layer structure of an ECW and plays a significant role in the working of the ECW. In this study, polyethyleneimine: lithium (bis(trifluoromethane)sulfonimide (PEI:LiTFSI)-based p

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41

Macklin, W. J. "Lithium insertion electrodes and molten salt electrolytes." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235017.

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42

莫家麟 and Ka-lun Mok. "Movement of electrolytes in a charged capillary." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31213443.

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43

Bloomer, S. T. "Stress-strain behaviour of soils containing electrolytes." Thesis, University of Sunderland, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381589.

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44

Young, Kevin Edward. "Ionic conductivity in silicate - containing solid electrolytes." Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335654.

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45

McHattie, Gillian S. "Ion transport in liquid crystalline polymer electrolytes." Thesis, University of Aberdeen, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324432.

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A systematic study of structure-property relations has been carried out on a range of polymers, both with and without mesogenic moieties. These materials have been characterised using various thermal techniques, including DSC and DMTA. These polymers have been complexed with LiClO<sub>4</sub> and the effects of the salt on thermal characteristics have been investigated. In addition, AC impedance spectroscopy has been employed to determine the temperature dependence of the conductivity of these complexes. Results suggest that polymers with mesogenic side groups have the potential to exhibit a c

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46

Abu-Lebdeh, Yaser. "Proton conducting polymer electrolytes for CO sensors." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342627.

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47

Neat, R. J. "Preparation-related effects in polymer solid electrolytes." Thesis, De Montfort University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383257.

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48

Chaudoy, Victor. "Electrolytes polymères gélifiés pour microbatteries au lithium." Thesis, Tours, 2016. http://www.theses.fr/2016TOUR4019/document.

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Au cours de cette thèse, un nouvel électrolyte polymère gel pour la réalisation de microbatteries au lithium a été développé. Le gel a été préparé par « confinement » d’une phase de N-propyl-N-méthylpyrrolidinium bis(fluorosulfonyl)imide (P13FSI) et de LiTFSI dans un réseau semi-interpénétré (sRip) de polymère (PVdFHFP/ réseau de POE). L’électrolyte gel a tout d’abord été optimisé et étudié en termes de propriétés physicochimiques et de transport ionique en fonction de sa composition. Ensuite, des batteries Li/LiNi1/3Mn1/3Co1/3O2 ont été assemblées en utilisant l’électrolyte sRip. Les performa

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49

Richards, William D. (William Davidson). "Ab-initio simulation of novel solid electrolytes." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/88398.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.<br>30<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 41-43).<br>All solid-state batteries may be a solution 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 electrolytes can match or exceed the liquid electrolytes i

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50

Gray, David John. "Conductivity studies of selected anionic composite electrolytes." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47453.

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