All-solid-state flexible supercapacitor using graphene/g-C3N4 …
The devices fabricated using the graphene/g-C 3 N 4 composite electrode exhibit a specific area capacitance of 1500 mF cm −2, and 95% of initial capacitance after …
Graphene film capacitor
The devices fabricated using the graphene/g-C 3 N 4 composite electrode exhibit a specific area capacitance of 1500 mF cm −2, and 95% of initial capacitance after …
Flexible Graphene-Based Supercapacitors: A Review
The recent rapid growth in graphene-based supercapacitors has reached the point where there is a need for solid-state devices with physical flexibility, which will be a crucial advantage in modern electronic devices. Herein, we summarize recent developments toward an all solid-state graphene-based flexible supercapacitor. The routes to produce …
Recent trends in graphene supercapacitors: from large area to microsupercapacitors …
Since Stoller described the first graphene supercapacitor in 2008, significant developments have been made during this last decade in the development of new graphene-based electrodes. In this way, the specific capacitance has been improved from 135 to 2585 F g −1 and the cyclability has been enhanced from a capacitance retention of just over 80% after …
Three-dimensional network of graphene for electrochemical capacitors …
As global climate change intensifies, sustainable development has risen to the forefront as a critical global concern. 1 Dependence on traditional energy resources, especially fossil fuels, has resulted in substantial greenhouse gas emissions, exacerbating global warming and environmental pollution. 2 In this context, carbon neutrality has …
High-Performance Flexible All-Solid-State Supercapacitor from Large ...
A large-size (30 cm × 7 cm) free-standing PEDOT/PSS-DEG film was prepared by bar-coating a thin layer of PEDOT/PSS and diethylene glycol (DEG) solution as described in experimental section.
Robust graphene composite films for multifunctional electrochemical capacitors …
The rapid development of portable electronics requires miniaturized and flexible electrochemical capacitors (ECs) with ultrafast frequency response and/or integrated high capacitive performance. Herein, we report such ECs based on the highly conductive films of reduced graphene oxide (rGO) and commercially available poly(3,4 …
Evolution of Graphene Patterning: From Dimension …
First, a graphene film was deposited on a Si/SiO 2 substrate. Second, highly ordered polystyrene (PS) nanospheres serving as etching mask were prepared and then transferred to the graphene …
Ultrahigh-rate supercapacitors based on eletrochemically reduced graphene oxide for …
Ultrahigh-rate supercapacitors based on eletrochemically ...
Thin-Film Electrode-Based Supercapacitors
Remarkably, the all-solid-state MSCs constructed by this F-modified graphene film delivered a high-energy density of 56 mWh cm −3 and exceptional stability with a capacitance retention of 93% after 5,000 cycles. Additionally, graphene-based TFEs with thicknesses of several micrometers were also produced by freeze drying 66 and …
Advances in graphene-based supercapacitor electrodes
Graphene-based materials find essential applications as efficient electrodes for SCs due to exceptional chemical stability, electrical conductivity (200, 000 cm 2 V −1 s …
Graphene-Based Flexible and Transparent Tunable Capacitors
We report a kind of electric field tunable transparent and flexible capacitor with the structure of graphene-Bi1.5MgNb1.5O7 (BMN)-graphene. The graphene films with low sheet resistance were grown by chemical vapor deposition. The BMN thin films were fabricated on graphene by using laser molecular beam epitaxy technology. …
RETRACTED ARTICLE: Graphene-Based Important Carbon Structures and Nanomaterials for Energy Storage Applications as Chemical Capacitors …
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 …
Methylene blue modified graphene film as high-performance electrode towards all-in-one flexible supercapacitors with "all-graphene…
The morphology of the graphene film was observed from SEM images. The SEM of GO (Fig. S3) shows a wavy structure with a smooth surface.For comparison, rGO (Fig. 2 a) shows a wrinkled structure with a rough surface, which can be attributed to the removal of the oxygen-containing functional groups from GO and result in the …
Graphene for batteries, supercapacitors and beyond
ing graphene film can be produced by peeling off or dis-solving the filter membrane. ... such as lithium-ion capacitors or aqueous asymmetric supercapacitors that contain a metal oxide .
Exploring the structure–capacitance relation of graphene film …
Tuning the microstructures of electrodes plays a vital role in enhancing the electrochemical performance of supercapacitors. In this work, we have developed a …
Graphene supercapacitors are 20 times as powerful, can be …
A team of international researchers have created graphene supercapacitors using a LightScribe DVD burner. These capacitors are both highly flexible (pictured below) and have energy and power ...
Recent trends in graphene supercapacitors: from …
Specifically, (a) the use of graphene foam to obtain large area electrodes, (b) the development of the direct laser writing technique for fast, one …
Advances in graphene-based supercapacitor electrodes
Advances in graphene-based supercapacitor electrodes
Graphene Based Aerogels: Fundamentals and Applications as ...
In contrast to conventional film, graphene-based aerogels have a stable 3D network and higher pore volumes. For the manufacture of graphene-based aerogels, self-assembly approaches are a common "bottom-up" tactics. ... Gao et al. fabricated asymmetric pseudo-capacitors using graphene aerogel consisting of 3D interconnected pores as …
A Simple Approach towards Highly Dense Graphene Films for …
The electrode materials of super-capacitor play a key role in the device performance, which can be divided into three categories: (1) carbon-based materials such …
Ultrahigh-rate supercapacitors based on eletrochemically reduced ...
Here, we report a double-layer capacitor based on three-dimensional (3D) interpenetrating graphene electrodes fabricated by electrochemical reduction of graphene oxide (ErGO-DLC).
Graphene-based materials for supercapacitor electrodes – A …
This review summarizes recent development on graphene-based materials for supercapacitor electrodes, based on their macrostructural complexity, i.e., zero …
Vertically-Oriented Graphene Electric Double Layer Capacitor Designs
Thus, power performance of this capacitor increases with operating temperature, which is opposite to the behavior exhibited by many conventional electrolytic and film capacitors. A primary need is a solid-state ionic liquid electrolyte suitable for the planar VOGN electric double layer capacitor with stable operation up to 125°C.