In this work, a quantitative physical model of charge control in graphene monolayers and bilayers is presented in conjunction with temperature dependent CV/GV measurements performed on planar MOS capacitors.The devices are fabricated in hydrogen intercalated epitaxial monolayers and bilayers grown on 6H-SiC with a thin Al 2 …
In this work, a quantitative physical model of charge control in graphene monolayers and bilayers is presented in conjunction with temperature dependent CV/GV measurements performed on planar MOS capacitors.The devices are fabricated in hydrogen intercalated epitaxial monolayers and bilayers grown on 6H-SiC with a thin Al 2 …
Flexible supercapacitors using graphene have been intensively investigated due to their potential applications for wearable and smart devices. In order to avoid stacking between graphene layers, spacers such as carbon fibers and metal oxide particles are often introduced. Such composites enhance effectively the specific surface …
Specifically, graphene could present several new features for energy-storage devices, such as smaller capacitors, completely …
Ultra-thin capacitor structures of barium titanate (BaTiO3, BTO) nanocube monolayers are fabricated using graphene as an electrode without high-temperature sintering.
"An energy-harvesting circuit based on graphene could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors," said Paul Thibado, professor of ...
Graphene-based supercapacitors have been attracting growing attention due to the predicted intrinsic high surface area, high electron mobility, and many other excellent …
The graphene-based materials are promising for applications in supercapacitors and other energy storage devices due to the intriguing properties, i.e., highly tunable surface area, outstanding electrical conductivity, good chemical stability, and excellent mechanical behavior. This review summarizes recent development on …
Graphene-based nanoporous materials have been extensively explored as high-capacity ion electrosorption electrodes ... P. et al. Modeling of electrochemical capacitors under dynamical cycling ...
Measurement of the quantum capacitance of graphene
Stretchable and High-Performance Supercapacitors with ...
We demonstrate a nano-electromechanical graphene varactor, a variable capacitor wherein the capacitance is tuned by voltage controlled deflection of a dense array of suspended graphene membranes. The low flexural rigidity of graphene monolayers is exploited to achieve low actuation voltage and high tunable capacitance density in an …
Ruthenium oxide/graphene (RuO 2 /GR) hybrid materials for high performance electrochemical capacitor have been prepared by a solution-phase assembly technology between RuO 2 nanosheets and GR nanosheets at room temperature. The high dispersion of RuO 2 and GR nanosheets maintains a high structural stability for …
Graphene has been extensively utilized as an electrode material for nonaqueous electrochemical capacitors. However, a comprehensive understanding of …
Miller J. R., Outlaw R. A., Holloway B. C., Graphene double-layer capacitor with ac line-filtering performance. Science 329, 1637 (2010). Crossref PubMed Web of Science Google Scholar 20 Zhu Y., et al., Microwave assisted exfoliation and reduction of graphite ...
This review summarizes recent development on graphene-based materials for supercapacitor electrodes, based on their macrostructural complexity, i.e., zero …
Flexible supercapacitors using graphene have been intensively investigated due to their potential applications for wearable and smart devices. In order to avoid stacking between graphene layers, spacers such as carbon fibers and metal oxide particles are often introduced. Such composites enhance effectively the specific surface …
A team working with Roland Fischer, Professor of Inorganic and Metal-Organic Chemistry at the Technical University Munich (TUM) has developed a highly efficient supercapacitor. The basis of the energy storage device is a novel, powerful, and also sustainable graphene hybrid material that has compara
The field of supercapacitors consistently focuses on research and challenges to improve energy efficiency, capacitance, flexibility, and stability. Low-cost laser-induced graphene (LIG) offers a ...
Micro-Supercapacitors (MSCs) are serving as potential candidates in the field of energy storage devices and applications. They have high capacitance and relatively small size and can be used as power storage for devices. The MSCs have many compartments and in recent years various forms of electrode materials are utilized in the …
Nonlinear graphene quantum capacitors for electro-optics
Graphene is a robust and attractive electrode material for supercapacitors because of its excellent electrical conductivity, high surface-to-volume ratio, and …
The surface area of a single graphene sheet is 2630 m2/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. Our group has pioneered a new carbon material that we call chemically modified graphene (CMG). CMG materials are made …
Supercapacitors, as one of the energy storage devices, exhibit ultrahigh capacitance, high power density, and long cycle. High specific surface area, mechanical and chemical stability, and low cost are often required for supercapacitor materials. Graphene, as a new emerging carbon material, has attracted a lot of attention in energy storage field …
Herein, we summarize recent developments toward an all solid-state graphene-based flexible supercapacitor. The routes to produce graphene-based …
Supercapacitors are being increasingly used as energy storage systems. Graphene, with its huge specific surface area, superior mechanical …
Graphene has a theoretical SSA of 2630 m 2 /g and a very high intrinsic electrical conductivity in plane as well as high mechanical strength and chemical stability ().Graphene-based material derived from graphite oxide (GO) is now being manufactured in ton quantities at low cost ().We have previously demonstrated supercapacitors that were …
Recently, supercapacitors using oriented graphene grown on nickel by means of chemical vapor deposition were reported (19) that demonstrated efficient …