A smart bottom-up strategy for the fabrication of porous carbon nanosheets containing rGO for high-rate supercapacitors in organic electrolyte
TL;DR: In this article, a bottom-up strategy to transformation of pitch into porous carbon nanosheets containing reduced graphene oxides (PCSG) through a soft solution process coupling with KOH activation is designed.
About: This article is published in Electrochimica Acta.The article was published on 2017-10-20. It has received 20 citations till now. The article focuses on the topics: Supercapacitor & Energy storage.
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TL;DR: In this article, N-doped porous carbon nanosheets (N-CNS) were prepared from coal tar pitch with the addition of urea and KOH activation.
87 citations
TL;DR: In this paper, a supercapacitor electrode material consisting of N-doped porous carbon tightly anchored on carbon nanotubes is proposed for high-performance double-layer capacitors.
61 citations
TL;DR: In this paper, an unprecedented carbon nanomesh that is made up of interconnected densely-packed carbon nanocages with ultrathin partially graphitic shells is reported, which is a very competitive material for high-performance supercapacitor in ionic liquid electrolyte.
59 citations
TL;DR: In this article, an Ag nanoparticles decorated Polyaniline (PANI)/graphitic carbon nitride (g-C3N4) composite was fabricated as active electrode materials for supercapacitors via an in-situ oxidative polymerization.
54 citations
26 Apr 2019
TL;DR: In this paper, a novel three-dimensional porous ultrathin carbon nanosheet (3DPAC) with considerable electrolyte penetration/absorption property was proven by experiment and theory.
Abstract: High specific surface area and reasonable pore-size distribution are conducive to promote the energy density and power density of carbon based supercapacitors. Nevertheless, the permeability of electrolyte is a prerequisite condition for surface storage charge and the ion diffusion in multiscale pores. Therefore, improving the electrolyte penetration/absorption is particularly important. Herein, we reported a novel three-dimensional porous ultrathin carbon nanosheet (3DPAC) with considerable electrolyte penetration/absorption property, which was proven by experiment and theory. The 3DPAC was prepared from abundant biomass waste wood dust via hydrothermal and carbonized treatment and characterized with ultrathin nanosheets, abundant porous structure, and rich N, O dopant. This unique three-dimensional and hierarchical porous structure leads to robust conduction of electrons and the penetration/absorption of electrolyte ions, which endow the 3DPAC with approved electrochemical properties. The supercapacitor...
45 citations
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TL;DR: In this article, the authors present the presentation, nomenclature, and methodology associated with the application of physisorption for surface area assessment and pore size analysis.
Abstract: Gas adsorption is an important tool for the characterisation of porous solids and fine powders. Major advances in recent years have made it necessary to update the 1985 IUPAC manual on Reporting Physisorption Data for Gas/Solid Systems. The aims of the present document are to clarify and standardise the presentation, nomenclature and methodology associated with the application of physisorption for surface area assessment and pore size analysis and to draw attention to remaining problems in the interpretation of physisorption data.
11,019 citations
TL;DR: An improved method for the preparation of graphene oxide (GO) is described, finding that excluding the NaNO(3), increasing the amount of KMnO(4), and performing the reaction in a 9:1 mixture of H(2)SO(4)/H(3)PO(4) improves the efficiency of the oxidation process.
Abstract: An improved method for the preparation of graphene oxide (GO) is described. Currently, Hummers’ method (KMnO4, NaNO3, H2SO4) is the most common method used for preparing graphene oxide. We have found that excluding the NaNO3, increasing the amount of KMnO4, and performing the reaction in a 9:1 mixture of H2SO4/H3PO4 improves the efficiency of the oxidation process. This improved method provides a greater amount of hydrophilic oxidized graphene material as compared to Hummers’ method or Hummers’ method with additional KMnO4. Moreover, even though the GO produced by our method is more oxidized than that prepared by Hummers’ method, when both are reduced in the same chamber with hydrazine, chemically converted graphene (CCG) produced from this new method is equivalent in its electrical conductivity. In contrast to Hummers’ method, the new method does not generate toxic gas and the temperature is easily controlled. This improved synthesis of GO may be important for large-scale production of GO as well as the ...
9,812 citations
TL;DR: Electrochemical measurements can distinguish between different types of energy storage materials and their underlying mechanisms, used to recover power in cars and electric mass transit vehicles that would otherwise lose braking energy as heat.
Abstract: Electrochemical measurements can distinguish between different types of energy storage materials and their underlying mechanisms.
4,394 citations
TL;DR: In this article, different types of capacitors with a pure electrostatic attraction and/or pseudocapacitance effects are presented, and their performance in various electrolytes is studied taking into account the different range of operating voltage (1V for aqueous and 3 V for aprotic solutions).
4,091 citations
TL;DR: Supercapacitors are able to store and deliver energy at relatively high rates (beyond those accessible with batteries) because the mechanism of energy storage is simple charge-separation (as in conventional capacitors) as discussed by the authors.
3,620 citations