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Carbon Materials for Chemical Capacitive Energy Storage

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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.

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Citations
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Journal ArticleDOI

Investigation of the Differential Capacitance of Highly Ordered Pyrolytic Graphite as a Model Material of Graphene

TL;DR: It was found that annealing the aged sample at 500 °C leads to partial removal of the contaminants, as gauged by the recovery of the measured capacitance, the first study of the effect of the airborne contaminants on the capacitance of carbon-based materials.
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Layered MoS2@graphene functionalized with nitrogen-doped graphene quantum dots as an enhanced electrochemical hydrogen evolution catalyst

TL;DR: In this article, a novel three-dimensional (3D) layered MoS2@graphene functionalized with nitrogen-doped graphene quantum dots (MoS2/N-GQDs-GR) composites as an enhanced electrochemical hydrogen evolution catalyst.
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Micropore engineering of carbonized porous aromatic framework (PAF-1) for supercapacitors application

TL;DR: The effect of diffusion and that of geometric packing of the electrolyte ions in the pores of carbonized materials control and influence significantly the capacitance of these materials.
Journal ArticleDOI

A dual NiCo metal-organic frameworks derived NiCo2S4 core-shell nanorod arrays as high-performance electrodes for asymmetric supercapacitors.

TL;DR: In this paper, the NiCo2S4 electrode was used as an anode material for asymmetric supercapacitor via hydrothermal and co-sulfurization processes.
Journal ArticleDOI

In situ growth of Co3O4 nanoparticles on α-MnO2 nanotubes: a new hybrid for high-performance supercapacitors

TL;DR: In this article, a new MnO2@Co3O4 hybrid with small-sized Co3O 4 nanoparticles grown on α-MnO2 nanotubes was prepared from a low concentration precursor solution by a facile two-step hydrothermal synthesis method, and its charge storage properties were investigated by cyclic voltammetry and galvanostatic charge discharge measurements.
References
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Journal ArticleDOI

Materials for electrochemical capacitors

TL;DR: This work has shown that combination of pseudo-capacitive nanomaterials, including oxides, nitrides and polymers, with the latest generation of nanostructured lithium electrodes has brought the energy density of electrochemical capacitors closer to that of batteries.
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