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Three-dimensional network of graphene for electrochemical capacitors ...
The prepared laser-scribed graphene (LSG) material was used to manufacture stretchable supercapacitors. At a current density of 0.02 mA cm −2, the capacitance can reach 18 mF cm −2. Furthermore, LSG supercapacitors exhibited excellent cycling stability, offering prospects for the development of wearable electronic devices. ...
Scalable fabrication of high-power graphene micro
Laser scribing of high-performance and flexible graphene-based electrochemical capacitors. Science 335, 1326–1330 (2012). Article ADS CAS Google Scholar
Enhancing supercapacitor performance through design …
In this study, we use a CO 2 laser to synthesize laser-induced graphene (LIG) in a single step at a low cost. We investigate the coating of MWCNTs on LIG to …
Highly conductive supercapacitor based on laser-induced graphene …
One of the foremost necessary desires of energy systems has been the existence of efficient, flexible, transportable, and eco-friendly devices. Among all the energy storage systems, supercapacitors have attracted plenty of attention thanks to their distinctive properties. Among all capacitor technologies, laser-induced graphene (LIG) …
Realizing Highly‐Ordered Laser‐Reduced Graphene for …
Laser reduction of graphene oxide (GO) with direct-write technology is promising to develop miniaturized energy storage devices because of highly flexible, …
Laser fabrication of graphene-based supercapacitors
Recently, laser technologies have been adopted: laser reduction of graphene oxides (LRGOs), laser treatment of CVDGs (LCVDGs), and laser-induced graphene (LIG) [54]. Compared with the graphene prepared via mechanical exfoliation, thermal/chemical RGO and CVDG, laser-enabled graphene can be prepared in large-area films with high …
Graphene Double-Layer Capacitor with ac Line-Filtering ...
A similar vertically oriented graphene nanosheet capacitor fabricated with an organic electrolyte (1 M tetraethylammonium-tetrafluoroborate salt in propylene carbonate) showed more definite but still incomplete saturation of capacitance at low frequency (fig. S1). ... Laser Scribing of High-Performance and Flexible Graphene-Based ...
Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors | Science
Fig. 1 Schematic illustration of the fabrication of laser-scribed graphene-based electrochemical capacitors. ( A to D ) A GO film supported on a flexible substrate is placed on top of a LightScribe-enabled DVD media disc, and a computer image is then laser-irradiated on the GO film in a computerized LightScribe DVD drive.
Laser scribed graphene for supercapacitors
Recently, laser scribed graphene has been increasingly studied for supercapacitor applications due to its unique properties, such as flexible fabrication, large surface area and high electrical conductivity. …
Beyond High-Voltage Capacitors: Supercapacitor Arrays Based on Laser ...
Supercapacitors are devices that instantly store and release electrical energy. However, their applications have been severely impeded by low capacitances under high operating voltages due to the surface area limit. This is why supercapacitors have not been applied for energy storage as widely as capacitors. Here, we present an innovative …
Graphene Double-Layer Capacitor with ac Line-Filtering Performance | Science …
Capacitance at 120 Hz was ~175 μF for the graphene nanosheet capacitor (with KOH electrolyte), which corresponds to a capacitance density of the 0.6-μm-thick active layer of ~3 F/cm 3. The graphene active layer stored ~1.5 FV/cm 3 …
Boosting High‐Performance Aqueous Zinc‐Ion Hybrid Capacitors …
Herein, a hybrid zinc-ion capacitor is fabricated on laser-induced graphene (LIG) based on in situ electropolymerization of organic compound poly(8-amino-2-naphthol). The electropolymerized long-conjugated chain polymers on the 3D conductive framework of LIG can enhance reaction kinetics, suppress the dissolution of organic compounds, and boost ...
Laser Scribing of High Performance and Flexible Graphene Based Electrochemical Capacitor
Electrochemical capacitors (ECs), also known as super capacitors or ultra capacitors charge and discharge faster than batteries; they are still limited by low energy densities and slow rate capabilities. Standard Light Scribe DVD optical drive is used to do the direct laser reduction of graphite oxide films to graphene. The produced films are mechanically …
Laser Scribing of High-Performance and Flexible Graphene …
An EC that combines the power performance of capacitors with the high energy density of batteries would represent a major advance in energy storage technology (5, 6), but this requires an electrode with higher and more accessible surface area than that of conventional EC electrodes while maintaining high conductivity.Graphene-based …
Laser-Induced Graphene Microsupercapacitors: Structure, …
Laser-induced graphene (LIG) is a graphenic material synthesized from a polymeric substrate through point-by-point laser pyrolysis. It is a fast and cost-effective …
Laser-assisted preparation of vertically aligned reduced graphene oxide/tannic acid arrays for flexible aqueous zinc-ion hybrid capacitors ...
Vertically aligned reduced graphene oxide arrays are obtained via laser assistance. • The redox-active tannic acid is introduced which plays multiple roles in this work. • This unique design provides abundant adsorption sites and transfer channels. • The multiple
Review of supercapacitors based on graphene: Advancements …
Laser scribing of high-performance and flexible graphene-based electrochemical capacitors. Science. 2012 Mar 16; 335 (6074): ... Laser-processed graphene based micro-supercapacitors for ultrathin, rollable, compact and designable energy storage components ...
Deformable micro-supercapacitor fabricated via laser ablation ...
Deformable micro-supercapacitor fabricated via laser ...
Graphene Capacitor-Based Electrical Switching of Mode-Locking …
By employing the graphene capacitor on the polished surface of a D-shaped fiber, we demonstrate the switching of the mode-locking operation reversibly from the femtosecond pulse regime to a continuous wave regime of the ring laser with an extinction ratio of 70.4 dB. Keywords: ...
Graphene Supercapacitors
The graphene supercapacitor is a high-capacitance capacitor made using graphene. This kind of capacitor is also called a Double Layer Capacitor. What makes it so unusual is its extreme capacitance; while normal capacitors have typical capacitances less than 10mF, a graphene supercapacitor can produce a capacitance of …
Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage | Nature …
Scalable fabrication of high-power graphene micro- ...
Laser photonic-reduction stamping for graphene-based micro …
With the unique three-dimensional structure of laser-induced graphene based electrode, a single micro-supercapacitor exhibits an ultra-high energy density …
Recent advances in graphene-based micro-supercapacitors: …
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 …
Boosting High‐Performance Aqueous Zinc‐Ion Hybrid Capacitors …
Herein, a hybrid zinc-ion capacitor is fabricated on laser-induced graphene (LIG) based on in situ electropolymerization of organic compound poly(8-amino-2-naphthol). The electropolymerized long-conjugated chain polymers on the 3D conductive framework of LIG can enhance reaction kinetics, suppress the dissolution of organic …
All-solid-state flexible supercapacitor using graphene/g-C
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 …
Beyond High-Voltage Capacitors: Supercapacitor Arrays Based …
Here, we present an innovative concept of subwavelength-featured graphene supercapacitor arrays fabricated by induction-inhibition femtosecond laser …