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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Assembled graphene oxide and single-walled carbon nanotube ink for stable supercapacitors
TL;DR: In this paper, the synthesis and fabrication of a graphene oxide and single-walled carbon nanotube composite ink (GO-SWCNT ink) for electrochemically stable supercapacitors is described.
Journal ArticleDOI
High-strength graphene composite films by molecular level couplings for flexible supercapacitors with high volumetric capacitance
Jun Cao,Chen Chen,Kena Chen,Qiongqiong Lu,Qingrong Wang,Pengfei Zhou,Daobin Liu,Li Song,Zhiqiang Niu,Jun Chen +9 more
TL;DR: In this paper, a strategy to prepare freestanding reduced reduced graphene oxide@polyvinyl alcohol (rGO@PVA) composite films by synchronously reducing and assembling GO sheets with PVA molecules on a metal surface is presented.
Journal ArticleDOI
Utilizing ionic liquids for controlled N-doping in hard-templated, mesoporous carbon electrodes for high-performance electrochemical double-layer capacitors
Benjamin E. Wilson,Siyao He,Keegan Buffington,Stephen G. Rudisill,William H. Smyrl,Andreas Stein +5 more
TL;DR: In this article, a phenol-formaldehyde precursor with the ionic liquid (IL) 1-ethyl-3methylimidazolium dicyanoamide (EMI-DCA) as the nitrogen source was used to enhance the specific energy of double-layer capacitors.
Journal ArticleDOI
Hierarchically structured C@SnO2@C nanofiber bundles with high stability and effective ambipolar diffusion kinetics for high-performance Li-ion batteries
TL;DR: In this article, a sandwich-structured carbon nanofiber@snO2@carbon coating (C@SnO2/C) nano-bundle was facilely prepared by using collagen fiber as the biotemplate as well as the carbon source.
Journal ArticleDOI
Solvent‐Free Mechanochemical Preparation of Hierarchically Porous Carbon for Supercapacitor and Oxygen Reduction Reaction
Jiawei Qi,Wendu Zhang,Lang Xu +2 more
TL;DR: Hierarchically porous carbon derived from fallen flowers was prepared by a green method of combining solvent-free ball milling with the safe activating agent potassium bicarbonate and can be extended to the green conversion of other varieties of biomass waste into useful carbon materials.
References
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