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
Facile Synthesis of Ordered Mesoporous Carbons with High Thermal Stability by Self-Assembly of Resorcinol−Formaldehyde and Block Copolymers under Highly Acidic Conditions
TL;DR: The carbon material obtained (denoted as C-ORNL-1) exhibits highly ordered hexagonal mesostructure, with a typical BET surface area of approximately 600 m2/g, pore size of 6.3 nm, and pore volume of approximately 0.60 cm3/g.
Journal ArticleDOI
Direct exfoliation of natural graphite into micrometre size few layers graphene sheets using ionic liquids
Xiqing Wang,Pasquale F. Fulvio,Gary A. Baker,Gabriel M. Veith,Raymond R. Unocic,Shannon M. Mahurin,Miaofang Chi,Sheng Dai +7 more
TL;DR: Stable high-concentration suspensions of non-oxidized few layer graphene (FLG) were obtained via direct exfoliation of natural graphite flakes in ionic liquids, such as 1-butyl-3-methyl-imidazolium bis(trifluoro-methane-sulfonyl)imide by tip ultrasonication.
Journal ArticleDOI
Tailoring of nanoscale porosity in carbide-derived carbons for hydrogen storage.
TL;DR: It is shown that carbon materials can be rationally designed for H2 storage, and gravimetric hydrogen storage capacity normalized to total pore volume is optimized in materials with primarily micropores rather than mesopores, in agreement with theoretical predictions.
Journal ArticleDOI
Nitrogen-doped mesoporous carbon for energy storage in vanadium redox flow batteries
Yuyan Shao,Xiqing Wang,Mark H. Engelhard,Chong M. Wang,Sheng Dai,Jun Liu,Zhenguo Yang,Yuehe Lin +7 more
TL;DR: In this article, a nitrogen-doped mesoporous carbon (N-MPC) was used for energy storage in vanadium redox flow batteries, and the results showed that the reversibility of the redox couple [VO]2+/[VO2]+ was greatly improved on N-mPC electrode compared with MPC and graphite electrodes.
Journal ArticleDOI
Hierarchical porous carbons with high performance for supercapacitor electrodes
Wei Xing,C.C. Huang,Shuping Zhuo,Xun Yuan,G.Q. Wang,Denisa Hulicova-Jurcakova,Zifeng Yan,Gao Qing Lu +7 more
TL;DR: In this article, a series of hierarchical porous carbons (HPCs) were prepared by a combination of self-assembly and chemical activation, and the pore-structure analysis showed that micropores can be generated within the mesopore wall of mesoporous carbon in a controllable manner during activation.