Charge and Energy Storage in Electrical Double Layers Books

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Charge and Energy Storage in Electrical Double Layers


Charge and Energy Storage in Electrical Double Layers
  • Author : Silvia Ahualli
  • Publisher : Academic Press
  • Release : 2018-11-28
  • ISBN : 9780128113998
  • Language : En, Es, Fr & De
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Charge and Energy Storage in Electrical Double Layers presents the basic scientific concepts and implementation of procedures devised to obtain capacitive energy from changes in the potential of electrical double layers when the salinity of solutions is changed. Capacitive deionization— the closely connected reciprocal process—is also considered. The book covers the fundamentals of electrical double layers and ions transport in porous media, the description of promising techniques of energy extraction, and the practical problems involved in each. It is written for scientists in academia and industry, and for graduate students working in supercapacitors, capacitive mixing and deionization. Provides a didactic presentation of the fundamentals of interface science involved in charge and energy storage processes Presents a pioneering overview of the application of the properties of solid/solution interfaces to desalination and energy extraction Edited by leading specialists with vast experience in the theory and experimental characterization of charged interfaces

Graphene as Energy Storage Material for Supercapacitors


Graphene as Energy Storage Material for Supercapacitors
  • Author : Inamuddin
  • Publisher : Materials Research Forum LLC
  • Release : 2020-01-20
  • ISBN : 9781644900543
  • Language : En, Es, Fr & De
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The book presents a comprehensive review of graphene-based supercapacitor technology. It focusses on synthesis, characterization, fundamental properties and promising applications of graphene materials and various types of graphene-based composites. The wide range of applications include electric power systems of portable electronics, hybrid-electric vehicles, mobile phones etc. Keywords: Graphene, Energy Storage Materials, Supercapacitors, Micro-Supercapacitors, Self-Healable Supercapacitors, Graphene-Based ZnO Nanocomposites, Defect Engineered Graphene Materials, Electric Power Systems.

Supercapacitors


Supercapacitors
  • Author : Lionginas Liudvinavičius
  • Publisher : BoD – Books on Demand
  • Release : 2018-06-27
  • ISBN : 9781789233520
  • Language : En, Es, Fr & De
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This edited volume Supercapacitors: Theoretical and Practical Solutions is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of electronic devices and materials. The book comprises single chapters authored by various researchers and is edited by a group of experts. Each chapter is complete in itself but united under a common research study topic. This publication aims at providing a thorough overview of the latest research efforts by international authors on electronic devices and materials and opens new possible research paths for further novel developments.

Graphene based Supercapacitors for Energy Storage Applications


Graphene based Supercapacitors for Energy Storage Applications
  • Author : Hao Yang
  • Publisher :
  • Release : 2013
  • ISBN : OCLC:868308389
  • Language : En, Es, Fr & De
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Abstract: Although great efforts have been made on development of high performance Li-ion batteries and fuel cells in the past, the slow power capability and high maintenance cost have kept them away from many applications. Recently, supercapacitors have drawn great attention because of their high charge/discharge rate, long life cycle, outstanding power density and no short circuit concern. However, supercapacitors generally exhibit low energy density. The objective of this thesis research is to develop graphene-based supercapacitors with simultaneously high power density and energy density at low production cost. Supercapacitors, also known as ultracapacitors or electrochemical capacitors, store energy as electrical charge on highly porous materials. Currently one major challenge that keeps supercapacitors from their promising applications is their low energy density. One promising electrode material candidate for electric double-layer (EDL) supercapacitors is graphene. Graphene, due to its unique lattice structure, exhibits appealing electrical properties, chemical stability and high surface area. Ideally a monolayer of sp2 bonded carbon atoms can reach a specific capacitance up to ~550 F/g as well as a high surface area of 2675 m2/g. So far, a variety of methods have been developed to synthesis graphene starting from graphite, but the cost, graphene quality and productivity remain main obstacles for their industrial application. The porous graphene material reported in this thesis was synthesized by a scalable oxidation-reduction method involving a rapid annealing process. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed the morphology and successful exfoliation of reduced graphene oxide (rGO). The interlayer distance characterized by X-ray diffraction (XRD) is 3.64 Å (24.44°) suggesting the removal of oxygen-containing functional groups, such as carbonyl, hydroxyl and carboxyl groups. In the X-ray photoelectron spectroscopy (XPS), the C/O ratio increases from ~2 to ~5 with O1s peak reduced significantly from graphite oxide (GO) to reduced graphene oxide. Furthermore, the successful reduction was verified by the low intensities of oxygen-related peaks in Fourier transform infrared spectroscopy (FTIR). In addition, the high Brunauer-Emmett-Teller (BET) specific surface area of 410 m2/g and mesoporous structure of the synthesized material would be beneficial to the improvement of charge-storage capability and thus energy density in supercapacitors. To evaluate the electrochemical performance of graphene electrodes, supercapacitors were assembled in symmetrical cell geometry. The near rectangular cyclic voltammetry (CV) curves with EMIMBF4 and LiPF6 at scan rate of 100mV/s suggest very efficient charge transfer within the porous graphene electrodes. The triangle charge-discharge responses with a small voltage drop and vertical spike in the low frequency region of a Nyquist plot indicates an ideal capacitor performance. The specific capacitance of 306.03 F/g and energy density of 148.75 Wh/kg at 1A/g were realized with highly porous graphene electrodes. Meanwhile, the power density extracted at 8A/g reaches ~10 kW/kg, thus, making it suitable for high power applications. Compared with previously investigated carbon-based EDL capacitors, the supercapacitor based on the annealed graphene electrode is a milestone in terms of capacitance and energy density. Moreover, the supercapacitors assembled with graphene electrodes shows excellent stability for 10,000 charge-discharge cycles.

Electrochemical Capacitors and Hybrid Power Batteries 2008


Electrochemical Capacitors and Hybrid Power Batteries 2008
  • Author : P. Simon
  • Publisher : The Electrochemical Society
  • Release : 2008-10
  • ISBN : 9781566776479
  • Language : En, Es, Fr & De
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Electrochemical capacitors in part or in whole on the electrical double later at electrode interfaces have found application in a variety of energy storage applications. Paper for the symposium are solicited that cover all fundamental and practical aspects of ultracapacitors, supercapacitors, and similar electrochemical energy conversion devices, including: 1) double layer and/or pseudo-capacitance of carbons, conducting polymers, and advanced inorganic materials, 2) synthesis and characterization of high surface area materials for electrochemical capacitors, 3) development and optimization of practical ultra- and super-capacitor components, including current collectors, electrodes, electrolytes, separators and packaging, 4) performance of new device designs and construction using symmetric and asymmetric electrode constructions, 5) mathematical models for performance characterization, 6) comparison of energy, power, and lifetime characteristics of hybrid fuel cell and battery power sources utilizing electrochemical capacitors. Keynote speakers will present tutorials covering recent advances and future directions for electrochemical capacitor technology.