Activated graphene-based carbons as supercapacitor electrodes with macro- and mesopores.

@article{Kim2013ActivatedGC,
  title={Activated graphene-based carbons as supercapacitor electrodes with macro- and mesopores.},
  author={TaeYoung Kim and Gyujin Jung and Seonmi Yoo and Kwang Suck Suh and Rodney S. Ruoff},
  journal={ACS nano},
  year={2013},
  volume={7 8},
  pages={
          6899-905
        }
}
Electric double layer capacitors (or supercapacitors) store charges through the physisorption of electrolyte ions onto porous carbon electrodes. The control over structure and morphology of carbon electrode materials is therefore an effective strategy to render them high surface area and efficient paths for ion diffusion. Here we demonstrate the fabrication of highly porous graphene-derived carbons with hierarchical pore structures in which mesopores are integrated into macroporous scaffolds… Expand
Hierarchical porous carbon spheres/graphene composite for supercapacitor with both aqueous solution and ionic liquid
Abstract Hierarchical porous carbon spheres/graphene (CSG) composite was prepared by a simple self-assembled method for supercapacitor electrode materials. Carbon spheres (CS) was chosen as theExpand
Graphene-like porous carbon from sheet cellulose as electrodes for supercapacitors
Abstract Graphene, a single layer of carbon atoms arranged in an hexagonal lattice, has attracted a lot of well-deserved attention due to its high surface area and excellent electrochemicalExpand
Ultra-light Hierarchical Graphene Electrode for Binder-Free Supercapacitors and Lithium-Ion Battery Anodes.
TLDR
A mild and environmental-friendly method is developed for fabricating a 3D interconnected graphene electrode with large-scale continuity that shows remarkable advantages in terms of the initiate reversible Coulombic efficiency, high specific capacity, and robust long-term retention. Expand
Creation of nanopores on graphene planes with MgO template for preparing high-performance supercapacitor electrodes.
TLDR
A facile chemical vapor deposition strategy to prepare highly porous graphene with flake-like MgO as template and ferrocene as the carbon precursor would open up an opportunity to prepare porous graphene for a wide applications in energy storage, biosensors, nanoelectronics and catalysis. Expand
Holey graphene nanosheets with surface functional groups as high-performance supercapacitors in ionic-liquid electrolyte.
Pores and surface functional groups are created on graphene nanosheets (GNSs) to improve supercapacitor properties in a butylmethylpyrrolidinium-dicyanamide (BMP-DCA) ionic liquid (IL) electrolyte.Expand
Performance of Partially Exfoliated Nitrogen-Doped Carbon Nanotubes Wrapped with Hierarchical Porous Carbon in Electrolytes.
TLDR
A route for the large-scale synthesis of nitrogen-doped porous carbon wrapped partially exfoliated carbon nanotubes with an interconnected hierarchical porous structure, as an advanced electrode material that can realize several potential applications for energy storage is presented. Expand
2D graphene-like hierarchically porous carbon nanosheets from a nano-MgO template and ZnCl2 activation: morphology, porosity and supercapacitance performance
Herein, we developed a facile and cost-efficient route to obtain two-dimensional (2D) graphene-like carbon nanosheets with a well-developed hierarchical pore structure (HPCNS) by using nano-MgOExpand
Porous Graphene‐Like Materials Prepared from Hollow Carbonaceous Microspheres for Supercapacitors
Catalytic activation of carbonaceous materials has recently been employed as an effective way to prepare porous graphene-like (PG) materials with large specific surface area and excellent electricalExpand
High-capacitance supercapacitor based on nitrogen-doped porous carbons-sandwiched graphene hybrid frameworks
Supercapacitor, as a new energy storage system, has attracted increasing interests owing to its fast charge/discharge process, high-power density, and long-cycling life. However, exploringExpand
Mesoporous activated carbon spheres derived from resorcinol-formaldehyde resin with high performance for supercapacitors
Porous electrode materials with large surface area and suitable pore size, as well as short diffusion distance of electrolyte ions in pore channels are desiderated for supercapacitor applications.Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 35 REFERENCES
3D macroporous graphene frameworks for supercapacitors with high energy and power densities.
TLDR
High-performance supercapacitors are demonstrated by building a three-dimensional (3D) macroporous structure that consists of chemically modified graphene (CMG) that endows MnO(2)/e-CMG composite electrodes with excellent electrochemical properties. Expand
Carbon-Based Supercapacitors Produced by Activation of Graphene
TLDR
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. Expand
Three-dimensional graphene-based macro- and mesoporous frameworks for high-performance electrochemical capacitive energy storage.
TLDR
3D GA-based mesoporous carbons and metal oxide hybrids can be successfully constructed via a nanocasting technology and manifests outstanding specific capacitance (226 F g(-1), high rate capability, and excellent cycling stability when it is applied in electrochemical capacitors. Expand
Highly conductive and porous activated reduced graphene oxide films for high-power supercapacitors.
TLDR
These free-standing thin films provide a route to simplify the electrode-manufacturing process by eliminating conducting additives and binders and are the highest values achieved while simultaneously maintaining excellent specific capacitances and energy densities for graphene materials. Expand
Capacitance properties of ordered porous carbon materials prepared by a templating procedure
The electrochemical performance of carbon materials with a highly ordered nanoporous structure is investigated in two-electrode supercapacitors. The materials were prepared by a templating procedureExpand
Effect of sheet morphology on the scalability of graphene-based ultracapacitors.
TLDR
Performance of graphene-based ultracapacitors can be further enhanced by using flat graphene sheets as the binder for the crumpled graphene balls, thus eliminating the need for less active binder materials. Expand
Superior electric double layer capacitors using ordered mesoporous carbons
This paper reports for the first time superior electric double layer capacitive properties of ordered mesoporous carbon (OMCs) with varying ordered pore symmetries and mesopore structure. Compared toExpand
Electrochemical storage of energy in carbon nanotubes and nanostructured carbons
Possibilities of electrochemical energy conversion using carbon nanotubes and related materials in various systems, such as lithium batteries, supercapacitors, hydrogen storage, are considered. It isExpand
Graphene-based ultracapacitors.
TLDR
CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material. Expand
Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer
TLDR
The results challenge the long-held axiom that pores smaller than the size of solvated electrolyte ions are incapable of contributing to charge storage. Expand
...
1
2
3
4
...