Journal ArticleDOI
Carbon Materials for Chemical Capacitive Energy Storage
TLDR
In order to further improve the power and energy densities of the capacitors, carbon-based composites combining electrical double layer capacitors (EDLC)-capacitance and pseudo-Capacitance have been explored and show not only enhanced capacitance, but as well good cyclability.Abstract:
Carbon materials have attracted intense interests as electrode materials for electrochemical capacitors, because of their high surface area, electrical conductivity, chemical stability and low cost. Activated carbons produced by different activation processes from various precursors are the most widely used electrodes. Recently, with the rapid growth of nanotechnology, nanostructured electrode materials, such as carbon nanotubes and template-synthesized porous carbons have been developed. Their unique electrical properties and well controlled pore sizes and structures facilitate fast ion and electron transportation. In order to further improve the power and energy densities of the capacitors, carbon-based composites combining electrical double layer capacitors (EDLC)-capacitance and pseudo-capacitance have been explored. They show not only enhanced capacitance, but as well good cyclability. In this review, recent progresses on carbon-based electrode materials are summarized, including activated carbons, carbon nanotubes, and template-synthesized porous carbons, in particular mesoporous carbons. Their advantages and disadvantages as electrochemical capacitors are discussed. At the end of this review, the future trends of electrochemical capacitors with high energy and power are proposed.read more
Citations
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Journal ArticleDOI
Carbon-based Supercapacitors Produced by Activation of Graphene
Yanwu Zhu,Shanthi Murali,Meryl D. Stoller,K. J. Ganesh,Weiwei Cai,Paulo J. Ferreira,Adam Pirkle,Robert M. Wallace,Katie A. Cychosz,Matthias Thommes,Dong Su,Eric A. Stach,Rodney S. Ruoff +12 more
TL;DR: This work synthesized a porous carbon with a Brunauer-Emmett-Teller surface area, a high electrical conductivity, and a low oxygen and hydrogen content that has high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes.
Journal ArticleDOI
Overview of current development in electrical energy storage technologies and the application potential in power system operation
TL;DR: A comprehensive and clear picture of the state-of-the-art technologies available, and where they would be suited for integration into a power generation and distribution system is provided in this article.
Journal ArticleDOI
Electrochemical capacitors: mechanism, materials, systems, characterization and applications
TL;DR: The latest progress in supercapacitors in charge storage mechanisms, electrode materials, electrolyte materials, systems, characterization methods, and applications are reviewed and the newly developed charge storage mechanism for intercalative pseudocapacitive behaviour is clarified for comparison.
Journal ArticleDOI
A review of electrolyte materials and compositions for electrochemical supercapacitors
TL;DR: The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature, and challenges in producing high-performing electrolytes are analyzed.
Ultracapacitors: Why, How, and Where is the Technology
TL;DR: In this paper, the authors compared the power density characteristics of ultracapacitors and batteries with respect to the same charge/discharge efficiency, and showed that the battery can achieve energy densities of 10 Wh/kg or higher with a power density of 1.2 kW/kg.
References
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Journal ArticleDOI
Relation between the ion size and pore size for an electric double-layer capacitor.
Celine Largeot,Cristelle Portet,John Chmiola,Pierre-Louis Taberna,Yury Gogotsi,Patrice Simon +5 more
TL;DR: A general approach to EDLC design leading to the maximum energy density is suggested, which has been now proved for both solvated organic salts and solvent-free liquid electrolytes.
Journal ArticleDOI
Recent Progress in the Synthesis of Porous Carbon Materials
TL;DR: A review of the progress made in the last ten years concerning the synthesis of porous carbon materials is summarized in this paper, where several different routes have been used to synthesize mesoporous carbon materials.
Posted Content
Liquid phase production of graphene by exfoliation of graphite in surfactant/water solutions
Yenny Hernandez,Mustafa Lotya,Nicolosi,Fiona M. Blighe,Sukanta De,Georg S. Duesberg,Jonathan N. Coleman +6 more
TL;DR: In this paper, a method to disperse and exfoliate graphite to give graphene suspended in water-surfactant solutions was demonstrated. Optical characterisation of these suspensions allowed the partial optimisation of the dispersion process and showed the dispersed phase to consist of small graphitic flakes.
Journal ArticleDOI
Mesoporous Carbon Materials: Synthesis and Modification
TL;DR: Methods for the preparation of mesoporous carbon materials with extremely high surface areas and ordered mesostructures, with potential applications as catalysts, separation media, and advanced electronic materials in many scientific disciplines are developed.
Journal ArticleDOI
Design and Tailoring of the Nanotubular Arrayed Architecture of Hydrous RuO2 for Next Generation Supercapacitors
TL;DR: By use of the membrane-templated synthesis route, hydrous RuO2 (RuO2.xH2O) nanotubular arrayed electrodes were successfully synthesized by means of the anodic deposition technique, exhibiting unexpectedly ultrahigh power characteristics with its frequency "knee" reaching ca.