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Dissertations / Theses on the topic 'Pseudocapacitori'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Rogani, Riccardo. "Caratterizzazione di elettrodi flessibili di PEDOT:PSS per lo sviluppo di un transistor elettrochimico." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/4956/.

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2

Venkataraman, Anuradha. "Pseudocapacitors for Energy Storage." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2486.

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Fluctuation in the demand for electrical power and the intermittent nature of the supply of energy from renewable sources like solar and wind have made the need for energy storage a dire necessity. Current storage technologies like batteries and supercapacitors fall short either in terms of power output or in their ability to store sufficient energy. Pseudocapacitors combine features of both and offer an alternative to stabilize the power supply. They possess high rates of charge and discharge and are capable of storing much more energy in comparison to a supercapacitor. In the quest for solut

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3

Mattos, Luana Lacy. "Eletrodos de polianilina para aplicação em pseudocapacitores." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/168131.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Física, Florianópolis, 2016.<br>Made available in DSpace on 2016-09-20T04:55:52Z (GMT). No. of bitstreams: 1 341606.pdf: 3792341 bytes, checksum: 518096b3c4c18195f39f41d0195f05ca (MD5) Previous issue date: 2016<br>Este trabalho teve como principal objetivo a fabricação e caracterização da polianilina (PANI), visando a sua aplicação em pseudocapacitores. Os ácidos H2SO4, HCl, HNO3 e TFA, por possuírem ânions com diferentes tamanhos, cargas e simetrias, foram escolh

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4

Cromer, Cynthia Eckles. "Preparation and characterization of vanadium oxides on carbon fiber paper as electrodes for pseudocapacitors." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47623.

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Supercapacitors are important electrochemical energy storage devices for microelectronic and telecommunication systems, electric cars, and smart grids. However, the energy densities of existing supercapacitors are still inadequate for many applications. Vanadium oxides have been studied as viable supercapacitor alternatives, with varying results. Methods are often complicated or time-consuming, and electrode fabrication often includes carbon powder and binder. The objective of this work was to study the effect of processing conditions on specific capacitance of supercapacitors based on vanadiu

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5

Wang, Gang, Steffen Oswald, Markus Löffler, Klaus Müllen, and Xinliang Feng. "Beyond Activated Carbon: Graphite‐Cathode‐Derived Li‐Ion Pseudocapacitors with High Energy and High Power Densities." WILEY‐VCH, 2019. https://tud.qucosa.de/id/qucosa%3A34562.

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Supercapacitors have aroused considerable attention due to their high power capability, which enables charge storage/output in minutes or even seconds. However, to achieve a high energy density in a supercapacitor has been a long‐standing challenge. Here, graphite is reported as a high‐energy alternative to the frequently used activated carbon (AC) cathode for supercapacitor application due to its unique Faradaic pseudocapacitive anion intercalation behavior. The graphite cathode manifests both higher gravimetric and volumetric energy density (498 Wh kg−1 and 431.2 Wh l−1) than an AC cathode (

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6

Scarabelot, Letícia Toreti. "Síntese e caracterização de pseudocapacitores de aerogéis de Ni(OH)2 incorporados com polipirrol." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/168226.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2016.<br>Made available in DSpace on 2016-09-20T05:04:49Z (GMT). No. of bitstreams: 1 340512.pdf: 1963134 bytes, checksum: 89f8b5b2f65809faa859a02a247a8308 (MD5) Previous issue date: 2016<br>O desenvolvimento de dispositivos de armazenamento de energia proporciona muitas vantagens para aplicações portáteis. Resistentes e estáveis, os supercapacitores são de suma importância para a tecnologia pois agregam características de alta densidade de pot

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7

Yip, Garriott. "Copper (II) hydroxide nanorods grown on copper and nickel plated nanofibres for pseudocapacitor electrodes in regenerative braking." University of British Columbia, 2017. http://hdl.handle.net/2429/63554.

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The threat of climate change has created a demand for superior energy storage devices. One application for them is regenerative braking in hybrid vehicles to reduce fuel consumption and greenhouse gas emissions. Instead of using brakes, the friction generated from turning electric motors charges batteries stops the vehicle. In turn, the batteries are used to accelerate the vehicle. Since braking time is short, batteries are imperfect for this application due to low rate of energy transfer (power). Supercapacitors are superior for power, but cost and amount of energy stored needs to be improved

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8

Chen, Xiaoyi. "Novel Conjugated Polymer Prepared by Electrochemical Polymerization as Active Material in Supercapacitor." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428325817.

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9

O'Neill, Laura. "Nanostructured thin film pseudocapacitive electrodes for enhanced electrochemical energy storage." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:8cfa1203-4162-4b85-9df4-ade8023c6489.

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This thesis presents work relating to the fabrication of novel thin film electrodes for energy storage applications, with a focus on low cost, nanostructured transition metal oxides, and electrode manufacture by atomised spray deposition. Iron oxide (FeO<sub>x</sub>) nanowires were synthesised hydrothermally and combined with multi-walled carbon nanotubes (MWNT) in sprayed electrodes, which provided the necessary conductivity enhancement for effective energy storage. The spray processing technique allowed for facile control over the relative fraction of MWNTs in the sprayed electrodes. Optimis

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10

Song, Min Kyu. "Synthesis and characterization of nanostructured, mixed-valent compounds for electrochemical energy storage devices." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/45925.

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The performances of current electrical energy storage systems (both batteries and electrochemical capacitors) are not capable of meeting the ever-increasing demands of emerging technologies. This is because batteries often suffer from slow power delivery, limited life-time, and long charging time whereas electrochemical capacitors suffer from low energy density. While extensive efforts have been made to the development of novel electrode materials, progress has been hindered by the lack of a profound understanding on the complex charge storage mechanism. Therefore, the main objective of this r

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11

Li, Wei. "Composite polymer/graphite/oxide electrode systems for supercapacitors." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439309266.

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12

MAGNAGO, L. B. "Síntese de NiFe2O4 a Partir do Níquel Reciclado de Baterias Ni-MH e Suas Aplicações Multifuncionais Como um Catalisador em Processos Foto Fenton e Como um Pseudocapacitor Eletroquímico." Universidade Federal do Espírito Santo, 2018. http://repositorio.ufes.br/handle/10/7348.

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Made available in DSpace on 2018-08-01T21:58:49Z (GMT). No. of bitstreams: 1 tese_12206_Luma Barbosa Magnago.pdf: 1956140 bytes, checksum: 16d722634803eabf0f76fd98302d22f7 (MD5) Previous issue date: 2018-03-16<br>Neste trabalho, o método de co-precipitação foi utilizado para a síntese de ferritas não dopadas (Fe2O3/Fe3O4-R) e dopadas com níquel a partir de reagentes comerciais (NiFe2O4-R) e a partir do níquel reciclado de baterias de níquel hidreto-metálico (Ni-MH) exauridas (NiFe2O4-B). A estrutura e composição das ferritas foi confirmada por difratometria de raios X (DRX), espectroscopia d

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13

Adusei, Paa Kwasi. "Carbon Nanotube-Based Composite Fibers for Supercapacitor Application." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1561996824580323.

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14

Chodosovskaja, Ala. "Nanostruktūrinimo įtaka kobalto oksido pseudotalpai." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120131_092641-16944.

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Energijos kaupiklių kūrimas pastaraisiais metais tapo svarbia mokslo aktualija. Elektrocheminiai kondensatoriai pasižymi didesne galia, ilgesniu savaiminio išsikrovimo laiku ir didesniu darbo ciklų skaičiumi negu tradicinės elektrocheminės baterijos. Didžiausia savitąja talpa pasižymi RuO2, tačiau jo praktinį taikymą riboja didelė kaina, todėl ieškoma pigesnių pakaitalų. Pastaraisiais metais aktyviai tiriamas kobalto oksidas. Svarbu yra surasti ekonomiškai efektyvius ir paprastus metodus, leidžiančius padidinti kobalto oksidų pseudotalpas. Darbe nustatytos elektrocheminio Co nusodinimo sąlygos

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15

Chodosovskaja, Ala. "Influence of cobalt oxide nanostructuring on electrochemical pseudo-capacitance." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120131_092732-72596.

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Design of high efficiency energy accumulators has recently become an important issue of science and technology. Electrochemical capacitors are distinguished for a greater power, a longer self-discharge time and a greater number of work cycles as compared to those of traditional electrochemical batteries. Effective supercapacitors are mainly produced of RuO2, which is distinguished from other metals for its nearly highest specific capacity, however its practical application is limited by its high price, therefore efforts are under way to find cheaper substitutes. Recently cobalt oxide has been

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16

Costa, João Carlos Martins da. "Síntese e caracterização galvânica da Polianilina (PANI) para aplicação em supercapacitores." Universidade Federal do Amazonas, 2016. http://tede.ufam.edu.br/handle/tede/5515.

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Submitted by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2017-02-15T15:22:18Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - João Carlos Martins.pdf: 2839902 bytes, checksum: f515009c41a7024f990b1cb0971c911e (MD5)<br>Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2017-02-15T15:22:35Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - João Carlos Martins.pdf: 2839902 bytes, checksum: f515009c41a702

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17

Rogier, Clémence. "Vers le développement d’un pseudocondensateur asymétrique avec des électrodes composites à base d’oxydes métalliques (MnO2, MoO3) et de carbones nanostructurés." Thesis, CY Cergy Paris Université, 2020. http://www.theses.fr/2020CYUN1098.

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Les supercondensateurs sont des systèmes de stockage de l’énergie destinés à des applications de nécessitant de fortes densité de puissance. Leur densité d’énergie peut être augmentée en développant de nouveaux matériaux d’électrode à forte capacitance. Dans cet objectif ces travaux décrivent le développement de matériaux composites à base de carbones nanostructurés (architectures avec des nanotubes de carbones et/ou de graphène oxydé réduit) et d’oxydes métalliques pseudocapacitifs (MnO2 et MoO3 pour les électrodes positive et négative respectivement). Les oxydes métalliques permettent de gén

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18

Pu, Long. "Nanostructured Materials for Pseudocapacitors and Single-Electron Devices." Thesis, 2014. http://hdl.handle.net/10012/8464.

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As a result of increasing demand of power in the modern society, energy storage/consumption is playing a more important role on future economics. Therefore energy storage systems which are more environmentally friendly, low-cost and high-performance have attracted much attention. Among electrochemical systems, supercapacitors are considered as a prominent candidate for the modern energy storage systems due to the high power density, high charge/discharge rate, and long lifetimes. Nevertheless, the performance of supercapacitors is limited by the significant disadvantage of low energy density.

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19

Makgopa, Katlego. "Effects of carbon nanomaterials on the performance of symmetric pseudocapacitors." Thesis, 2016. http://hdl.handle.net/2263/57254.

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This thesis reports on the study of carbon nanomaterials integrated with nanostructured birnessite-type MnO2 and tetragonal hausmannite-type Mn3O4 as electrode materials for enhanced performance in symmetric pseudocapacitors. This work further explores the synergistic effect of graphene oxide decorated with particles of nickel (II) tetraaminophthalocyanine as electrode materials for improved performance (power and energy densities) in symmetrical pseudocapacitor device. Physical properties of the synthesised electrode materials were investigated using scanning electron microscopy (SEM), transm

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20

Pin-RuWu and 吳品儒. "Fabrication and characterization of pseudocapacitor materials/reduced graphene oxide nano-hybrids." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4h2g4f.

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碩士<br>國立成功大學<br>化學工程學系<br>104<br>This thesis concerns the fabrication and supercapacitor performance of nickel cobalt alloy with partial sulfidation/reduced graphene oxide (Ni-Co-S/Ni-Co/rGO) and manganese oxide/polypyrrole/reduced graphene oxide (MnOx/PPy/rGO) nano-hybrids. Firstly, Ni-Co-S/Ni-Co/rGO nano-hybrid was synthesized via a two-step method. Because the highly conductivity of Ni-Co alloy could increase the electron transport rate during faradic redox reaction and the good pseudocapacitor property of Ni-Co-S could provide a higher capacitance, it was attempted to improve the capacitor

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21

陳家慶. "Cathodic Deposition of Nickel Cobalt Hydroxides and the Charge Storage Mechanism of Pseudocapacitors." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/12766716048743329804.

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22

Huq, Mohammad Mahmudul, and 馬皓翔. "One-step electrophoretic fabrication of graphene and carbon nanotube-based scaffold for manganese-based pseudocapacitors." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/77904412234324024871.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>104<br>This study develops an one-step method of electrophoretic deposition (EPD) of carbon nanotubes (CNTs) and graphene nanosheets (GNs) as a scaffold for manganese-based pseudocapacitors. In this study, two different scaffolds for manganese deposition were fabricated: one having 2D GNs and another with 3D GN/CNT nano-porous structure (designated as GN-Mn and GN-CNT-Mn respectively). Manganese was deposited in-situ during the EPD fabrication process. For comparison one 3D nanoporous electrode was made without any Mn deposition by the same method. The microstructu

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23

Huang, Pin-Jen, and 黃品禎. "Preparation and characterization of gold/polyaniline core-shell nanowires on graphite foil as electrode for pseudocapacitor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/q8du4y.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>107<br>In this thesis, the AuNWs/ PANI was fabricated on graphite substrate through electrochemical deposition and electrochemical polymerization. The influence of polymerization cycle and sweeping rate to AuNWs/PANI composites morphology and capacitance is investigated. By using scanning electrode microscope (SEM) and the weight loading of PANI, it could be concluded that the AuNWs/PANI structure has more PANI weight and thicker layer when increasing the polymerization cycle. In addition, the weight and thickness of PANI increased with slower polymerization sweepi

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24

Jiang, Qiu. "Engineering of Pseudocapacitive Materials and Device Architecture for On-Chip Energy Storage." Diss., 2019. http://hdl.handle.net/10754/631356.

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The emergence of micropower-type applications such as self-powered sensors and miniaturized electronic systems has increased interest in on-chip electrochemical energy storage such as microsupercapacitors. Microsupercapacitors (MSCs) are high rate and high power yet miniaturized versions of macroscopic supercapacitors. MSCs with planar configuration have higher power density at potentially comparable energy density to thin-film batteries, while possessing essentially infinite cycle life. They could also offer compatible integration with smart electronic devices on an integrated chip (IC). In t

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25

Ming-JayDeng and 鄧名傑. "Electrochemical preparation of porous Ni electrodes from 1-ethyl-3-methylimidazolium-dicyanamide ionic liquid and its application for Co oxides pseudocapacitor." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/80847857710430624433.

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博士<br>國立成功大學<br>化學系碩博士班<br>98<br>In this study, the 1-ethyl-3-methyl -imidazolium dicyanamide (EMI-DCA) ionic liquid for electrochemical application was evaluated with transition metal ion. The temperature dependency of the density and absolute viscosity of EMI-DCA were measured. Due to the ligand property of the DCA- anion, CuCl and NiCl2 are soluble in EMI-DCA. Amperometric titration experiments suggest that Ni(II) reacted with DCA- anions forming [Ni(DCA)4]2- complex anion, which could be reduced to metal via a single-step electron transfer process. Cyclic voltammograms of Ni(II), Cu(I), an

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26

XU, SHUO-YAN, and 許碩巖. "Synthesis of Manganese Oxide /Carbon Cloth Via Electrodeposition for Pseudocapacitor and Investigating on the Performance of Energy Storage of Pseudo-parallel Capacitors Assembled." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wpqnu3.

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碩士<br>國立臺北科技大學<br>化學工程與生物科技系化學工程碩士班<br>107<br>The supercapacitor with the high power density, excellent high-rate charge/discharge capacity and long cycle life properties has been developed intensively nowdays. Among the energy storage materials of metal oxides, the manganese oxide with the high specific capacitance, low cost, abundant sources and environmentally friendly features has been widely applied in numerous fields. However, the low electrical conductivity, small surface area and unstable morphology make the real capacitance of manganese oxide be smaller than the theoretical value. An

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27

Golozar, Mehdi. "Solution Precursor Plasma Spray Deposition of Super-capacitor Electrode Materials." Thesis, 2011. http://hdl.handle.net/1807/30608.

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Double layer capacitors owe their large capacitance to high specific surface area carbon-based electrode materials adhered to a current collector via an adhesive. However, recent studies attribute greater electrical energy storage capacity to transition metal oxides/nitrides: a new generation of electrode materials for use in super-capacitors with mixed double-layer and pseudo-capacitive properties. Solution precursor plasma spray deposition is a technique that allows coatings to be fabricated with fine grain sizes, high porosity levels, and high surface area; characteristics ideal for applica

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28

Xie, Han Jin. "Étude sur les propriétés physicochimiques et électrochimiques des liquides ioniques redox et leur application en tant qu’électrolyte dans les supercapaciteurs." Thèse, 2015. http://hdl.handle.net/1866/16089.

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Ce mémoire porte sur les recherches et les développements dans le domaine des électrolytes à base de liquide ionique redox. Une nouvelle famille de liquide ionique redox basée sur le ferrocenylsulfonyl(trifluoromethylsulfonyl) (FcNTf) a été développée et étudiée pour la première fois afin de démontrer le potentiel de ces liquides ioniques dans les dispositifs de stockage d’énergie. En premier lieu, les liquides ioniques redox (RILs) composés de l’anion électroactif et du cation d’alkylimidazolium sont synthétisés et caractérisés. L’impact de la variation des chaînes alkyles du cation sur les p

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