Tesis sobre el tema "Batterie al sodio"
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GENTILE, ANTONIO. "MXene-based materials for alkaline-ion batteries: synthesis, properties, applications". Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/382748.
Texto completoThe ever-increasing production of portable devices and electric cars asks to the market to produce efficient devices that can store electrical energy. For these types of technologies, where device miniaturization is essential, lithium-ion batteries (LIBs) have become leaders as energy storage systems. The research on the lithium-ion batteries is focused to obtain more performing devices with high gravimetric and volumetric capacities of the electrode materials. In addition to the technological aspect, related to the optimization of materials, there is the supply chain of active components of the battery to consider, starting from lithium. At the moment, the problem is tackled by studying batteries with other alkaline metal ions, i.e. Na+ and K+. However, there are no standardized active materials for these devices, especially on sodium-ion batteries (SIBs), started only a few years later than that of LIBs; therefore, today these technologies are intended to support the LIBs in order to satisfy the enormous market demand of the batteries for the future vehicles. The goal of this work was to develop MXene-based anode materials to obtain efficient anodes for sodium and lithium-ion batteries. MXenes are a family of inorganic transition metal carbides, nitrides, and carbonitrides with a 2D structure that would seem promising for the intercalation of different ions due to a great flexibility and adaptability towards several intercalating ions. The ion intercalations occur by a pseudocapacitive mechanism whereby the materials have limited capacity, but they have great electrochemical stability over thousands of cycles and coulombic efficiencies near to 100%. The production of this material was done by HF etching of a precursor called MAX phase. This is the easiest and fastest method to obtain the material in laboratory scale, but it has many criticalities when the process has to be scale-up to industrial scale. A large part of this work was spent studying the synthetic technique to obtain MXenes for SIB by reducing or replacing HF in the chemical synthesis. The materials have been characterized by various techniques such as X-ray diffractometry, electron microscopy, X-ray photoelectron spectroscopy, etc., and by electrochemical tests, such as cyclic voltammetry and galvanostatic cycling. Thanks to the 2D structure, a common use of MXene in the literature is in nanocomposite syntheses for SIBs and LIBs, in order to produce high-capacity materials, as required in the battery market. Therefore, two nanocomposites based on antimony-MXene and tin oxide-MXene tested for SIB and for LIB respectively, were synthesized. Antimony and tin oxide are two materials with high theoretical capacity when used as anodes in batteries, but at the same time, they are extremely fragile and tend to pulverize during charging and discharging processes. MXene is used as a buffer to limit or prevent cracking and separation of alloys from the electrode surface.
Farina, Luca. "Sodium Ion battery for energy intensive application". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Buscar texto completoDambone, Sessa Sebastian. "Analisi dell'accumulo elettrochimico ad alta temperatura per l'integrazione delle fonti rinnovabili nella rete di trasmissione nazionale". Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422777.
Texto completoIn questa tesi viene analizzata la compatibilità della tecnologia di accumulo elettrochimico stazionario dell'energia elettrica nota come Na-beta per installazioni su larga scala sulla rete elettrica di trasmissione allo scopo di supportare il sistema elettrico nella gestione delle problematiche relative alla sempre maggiore penetrazione di fonti di energia rinnovabile sulla rete. Dettagliate analisi di rischio sono state condotte in collaborazione con le aziende produttrici sulle due tipologie di batterie Na-beta, ovvero quella sodio-cloruro di nichel e quella sodio-zolfo per valutare l'affidabilità nell'esercizio, la sicurezza per le persone e la compatibilità ambientale. Viene inoltre presentato un approccio di modellizzazione matriciale innovativo per la tecnologia sodio-cloruro di nichel, facilmente estendibile alle batterie sodio-zolfo date le caratteristiche molto simili delle due tecnologie. Il modello realizzato, di tipo elettrico, è stato validato mediante confronto dei risultati con misure sperimentali effettuate in collaborazione con Terna nei laboratori ENEA di Roma su di un modulo da 7,8 kW, dando un'ottima concordanza sia in regime permanente che transitorio.
Francisconi, Mattia. "Analisi di sistemi di accumulo per impianti fotovoltaici domestici". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23798/.
Texto completoNasti, Annamaria Assunta. "Ruolo dello scambiatore sodio-calcio 1 nell'ipertrofia cardiaca indotta da batteri". Doctoral thesis, Università Politecnica delle Marche, 2012. http://hdl.handle.net/11566/242024.
Texto completoPathological cardiac hypertrophy (CH) is a maladaptive response to an increased biomechanical stress and accompanies many forms of heart disease. The mechanisms underlying the maladaptive features of the hypertrophic response are under intense investigation and numerous remodelling processes develop with functional perturbation of [Ca2+]i. One of the key players for the maintenance of [Ca2+]i homeostasis in the heart is the sodium/calcium exchanger 1 (NCX1). Bacterial infections can potentially provoke CH, affecting directly or indirectly the intracellular [Ca2+]i homeostasis. In this study, we propose that NCX1 may be a critical player in triggering and progression of heart damages due to bacterial infections. Results obtained in our lab show that LPS, the main important endotoxin from Gram-negative bacteria, induces a hypertrophic response that is prevented by ciclosporin in ex vivo perfused heart, in primary cardiomyocytes and in heart-derived cell lines. In all systems used, we found significant NCX1 alterations after exposition to LPS 1 g/ml for 3 and 24 hours. In particular, LPS increased NCX1 expression (both at mRNA and protein level), having no effect on exchanger distribution within the cell. The increase in NCX1 protein to LPS was also observed in myocytes where exchanger expression was not regulated by endogenous promoter activity. Moreover, NCX1 expressing cells developed defects in calcium handling after LPS exposure, since the calcium entry into the cells through the reverse mode of NCX1 was significantly higher in stressed cells. In addition, we found that NCX1 is critical for the hypertrophic response to LPS, since the specific NCX1 inhibitor SN6 completely prevented it. When myocytes without endogenous NCX1 were used, the hypertrophic response to LPS was significantly blunted compared to control. Taken together, these results suggest that NCX1 can be considered as new druggable target to prevent detrimental heart response to bacteria infections.
Perkins, John Drummond. "Daniel's Battery: A Narrative History and Socio-Economic Study of the Ninth Texas Field Battery". Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc332573/.
Texto completoSuský, Stanislav. "Elektrolyty pro sodno – iontové akumulátory s použitím iontových kapalin". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442526.
Texto completoPIANTA, NICOLÒ. "Strategies for the optimization and characterization of materials for energy storage". Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/382288.
Texto completoEver since its invention, the Li-ion battery has dominated the market of electrochemical storage systems, thanks to its outstanding properties in terms of energy and power density. However, the fact that this technology is inextricably linked to non-homogenously distributed and rare resources, mostly lithium and cobalt, makes it essential to have alternatives, if not to completely replace it at least to diversify the market and reduce the dependence on the aforementioned rare resources. Two examples of such alternatives are the Na-ion battery and the electrochemical double-layer capacitor. These devices have the chance to compete with LIBs in some situations but both of them could greatly benefit from an increase in their energy density. Also, monitoring the evolution of their performances should be considered a priority in order to get deeper insights on how to improve them so to make them comparable to LIBs. The doctoral research here described was focused on two main objectives: proposing ways to improve the energy density of storage systems (NIBs and EDLCs) and suggesting a new technique to monitor such devices operando: the dynamic electrochemical impedance spectroscopy. Fabricating high potential electrodes is a way to improve the energy storage capabilities of a Na-ion battery. In this thesis, Na3V2(PO4)2F3, an active material able to store sodium-ions at a mean potential as high as 3.8 V vs Na+/Na, was synthesised. This material was used to fabricate self-standing massive electrodes (active mass loading: 25 mg cm-2), which proved to be a very interesting method to improve the energy density. NVPF was also tested as an actual cathode in a full sodium-ion cell so to prove its high potential and relative issues. To improve EDLCs energy densities, highly concentrated solutions of potassium acetate in water were prepared and studied from their physicochemical and electrochemical characterization to the use of the highest concentrated ones (water-in-salt electrolyte) in symmetric carbon-based EDLCs. Such solutions proved to be able to increase both the capacitance and the maximum reachable potential difference between the two electrodes, resulting in higher energy densities compared to conventional electrolytes (e.g. 6M KOH solution in water). Finally, dynamic electrochemical impedance spectroscopy was evaluated as a method to study NIBs and EDLCs while cycling. Two systems, an aqueous EDLC and an insertion material for NIBs, were analysed with dEIS: a technique able to monitor the temporal changes in the electrochemical impedance spectroscopy while a device undergoes a cycling process. This approach proved to be doable for both potentiodynamic and galvanostatic techniques, allowing to probe the impedance of the single electrodes even in experimental conditions similar to those with which a real device operates.
Baldissarri, Mattia. "Studio di un impasto acido funzionale ad elevata biodisponibilita di selenio". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6185/.
Texto completoGueyap, Metchehe Carine Megal. "La micropropagazione di spezie ad uso alimentare: il caso dello zenzero". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21681/.
Texto completoVaněk, Martin. "Připrava a charakterizace keramických aktivních materiálů pro sodno-iontové akumulátory". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242140.
Texto completoAmriou, Tayeb. "Etude ab-initio de la strucutre électronique des composés lamellaires intercalés detype AMX2. Application aux batteries rechargeables". Artois, 2003. http://www.theses.fr/2003ARTO0405.
Texto completoThis work describes a general study of the layered compounds AMX2 (A = Li, Na ; M = Transition Metals; X = O, S, Se) usually used as positive electrode in the rechargeable batteries. First principal calculations are used to investigate the structural, electronic and electrochemical properties of theses compounds. The open circuit voltage variation is correlated to the nature of the alkali, the transition metal and the chalcogene. The results are interpreted with the charge transfer phenomena. It has been shown that the behaviour with the lithium intercalation is different from sodium intercalation. So, the understanding of the charge transfer is the key criteria to obtain a high potential
Bečan, Jan. "Pokročilé uhlíkové struktury jako materiál pro Na-ion akumulátory". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442445.
Texto completoViglietti, Paola. "Maternal alcohol consumption and socio-demographic determinants of neurocognitive function of school children in the rural Western Cape". Master's thesis, Faculty of Health Sciences, 2021. http://hdl.handle.net/11427/33095.
Texto completoSavoca, Riccardo. "il litio: mobilita' elettrica e prevenzione incendi nella catena produttiva". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Buscar texto completoBjörkman, Jesper y Simon Lundqvist. "Exploring off-grid electricity production in Sweden: Benefits vs costs". Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279592.
Texto completoUnder det senaste decenniet har teknik som underlättar hushållens elproduktion och lagring haft en hastig utveckling tillsammans med en betydande kostnadsminskning. Forskning pekar på en ökad andel hushållsproducerad el inom de befintliga nationella elnäten över hela världen. I vissa fall är självförsörjning möjligt där hushållen kan koppla bort sig från nätet och bli oberoende av sin elförsörjning, med andra ord gå off-grid. Vidare leder en potentiell förändring mot offgrid till ytterligare påtryckningar på hur elsystemet är uppbyggt, vilket utmanar många aktörers sätt att agera. Beroende på geografisk plats så varierar förutsättningarna för självförsörjning. Sverige är ett land med stora säsongsvariationer i och med sin nordliga position, vilket väcker frågan om off-grid hushåll är genomförbara i Sverige och hur de kan skulle kunna etableras. För att undersöka möjliga förändringar inom stora tekniska system som elsystemet, som är en viktig del av samhället, har teorier inom socio-tekniska system visat vara till stor nytta. Däremot saknar dessa teorier emellertid den mer tekno-ekonomiska aspekten av konkreta och framtida investeringskostnader ur ett konsumentperspektiv, vilket antyder ett befintligt forskningsgap. Följaktligen är syftet med den här studien att ge ytterligare inblick om off-grid-applikationer i svenska sammanhang. Vilket har gjorts genom att undersöka vilka omständigheter som kan leda till att befintliga elkonsumenter går off-grid. Forskningsprocessen och strukturen i rapporten kan vara svårtolkat, men studien har fokuserat på att kombinera teorier kring socio-tekniska förändringar samtidigt som man använder teknoekonomisk modellering för att stärka arbetet. Data samlades in i form av en litteraturstudie och intervjuer för att ge en holistisk representation av off-grid och dess koppling till elsystemet. Utöver litteraturstudie utfördes kompletterande modellering av hushållsanslutna, prosumeroch off-gridhushåll. Resultaten pekar mot scenarion där off-grid når nätparitet under de kommande två decennierna, vilket kommer att öka den ekonomiska rationaliteten för att investera i ett off-grid. Det finns det för närvarande inga ekonomiska skäl till att investera off-grid-applikationer med tanke på de relativt låga elkostnaderna i Sverige idag. Förhållandena visar dessutom löfte om att potentiella användare ser förbi ekonomin och har istället en stark vilja mot självständighet. Implikationer tyder emellertid på att det svenska elnätets höga tillförlitlighet och låga pris hindrar nya radikala innovationers förmåga att ta få fäste. Det är argumenterbart att den här studien har bidragit med att fylla forskningsgapet mellan socio-tekniska förändringar och tekno-ekonomiska projektioner inom elsystem. Samtidigt har studien bidragit till det vetenskapliga området kring socio-tekniska visat på möjligheten och fördelen i att kombinera teorier kring socio-teknisk förändring och tekno-ekonomiska förändringar. Dessutom kan det hävdas att resultaten av den här studie visar att konsumenten har en större roll i utvecklingen av applikationer utanför nätet än vad teorierna föreslår. Slutligen är elsystemet en komplex mekanism, och för att ytterligare stärka uppfattningen om hur en relativt ny applikation, som i fallet utanför nätet, kommer att påverka systemet föreslås lämpliga förslag för eventuell framtida forskning inom området.
Brabeck, Kalina Marie. "Exploring battered Mexican-origin women's help-seeking within their socio-cultural contexts". Thesis, 2006. http://hdl.handle.net/2152/2682.
Texto completoNargaroo, Venodha. "The influence of age, sex, and socio-economic status on the performance of normal adults on the Luria-Nebraska Neuropsychological Battery (LNNB)". Thesis, 1991. http://hdl.handle.net/10413/5817.
Texto completoThesis (M.A.)-University of Durban-Westville, Durban, 1991.
Venter, Amné. "Vlak van ooreenstemming tussen die "Movement Assessment Battery for Children-2" en die "Little Developmental Coordination Disorder Questionnaire" vir breë sifting by kinders onder 5 jaar / Amné Venter". Thesis, 2014. http://hdl.handle.net/10394/15739.
Texto completoMSc (Kinderkinetics), North-West University, Potchefstroom Campus, 2015
Alho, Chantelle Manuela. "The social effects of the exposure to domestic violence during childhood : a socio-educational perspective". Diss., 2015. http://hdl.handle.net/10500/20068.
Texto completoEducational Foundations
M. Ed. (Socio-Education)