Three-dimensional graphene capacitor
A lightweight, flexible, and highly efficient energy management strategy is needed for flexible energy-storage devices to meet a rapidly growing demand. Graphene-based flexible supercapacitors are one of the most promising candidates because of their intriguing features. In this report, we describe the use of freestanding, lightweight (0.75 mg/cm2), … - Download [PDF]
Freestanding Three-Dimensional Graphene/MnO2 Composite …
A lightweight, flexible, and highly efficient energy management strategy is needed for flexible energy-storage devices to meet a rapidly growing demand. Graphene-based flexible supercapacitors are one of the most promising candidates because of their intriguing features. In this report, we describe the use of freestanding, lightweight (0.75 mg/cm2), …
Porous monoliths of 3D graphene for electric …
Advanced three-dimensional graphene (3DG) porous monoliths: design, synthesis methods, and electric double-layer capacitor (EDLC) application. The dual networks are the solid carbon network and the pore cavity network
Dielectric capacitors with three-dimensional nanoscale ...
Figure 1B schematically shows the component parts of the newly designed dielectric capacitor, illustrating that the capacitor consists of the uniquely structured nanoporous AAO membrane as a dielectric and two asymmetrical arrays of CNTs as two opposite electrodes. The arrangement of the interdigital electrodes with each …
Electric Double Layer Capacitors Based on Porous Three …
The three-dimensional (3D) network structure of graphenes have been recently highlighted as potential electrode materials of supercapacitors. In this review, …
Three-level micro–meso–macroporous three-dimensional graphene for ...
Herein, micro-meso-macroporous three-dimensional graphene (MMM-3DG) with a high surface area (1492.8 m 2 g −1) was fabricated in gram-scale production (>1.0 g per one time) as an effective active material for CDI. ... (EDL) capacitor principle, is operated by an external electrical energy applied between two electrodes where charged …
3-Dimensional Graphene Carbon Nanotube Carpet-Based ...
In this research, 3-dimensional (3D) graphene/carbon nanotube carpets (G/CNTCs)-based microsupercapacitors (G/CNTCs-MCs) were fabricated in situ on nickel electrodes. The G/CNTCs-MCs show impedance phase angle of −81.5° at a frequency of 120 Hz, comparable to commercial aluminum electrolytic capacitors (AECs) for …
Modified 3D Graphene for Sensing and …
In this work, three types of CVD-synthesized 3-dimensional graphene, differing in their sp 2 /sp 3 ratio, nitrogen doping content, and oxygen presence, are compared for their electrochemical …
Three-dimensional network of graphene for electrochemical capacitors …
DOI: 10.1063/5.0177677 Corpus ID: 267368577; Three-dimensional network of graphene for electrochemical capacitors and capacitive deionization @article{Zhu2024ThreedimensionalNO, title={Three-dimensional network of graphene for electrochemical capacitors and capacitive deionization}, author={Hongda Zhu and …
Capacitance of edge-free three-dimensional graphene: New …
We successfully synthesized a series of edge-free three-dimensional (3D) graphene materials via CVD of methane on an Al 2 O 3 nanoparticle template. The …
Supercapacitors Based on Three-Dimensional …
In particular, the supercapacitors using these 3D-GCA electrodes with thicknesses on the order of millimeters display exceptional capacitive retention (ca. 90% from 0.5 to 10 A·g –1) and power densities …
High-performance flexible supercapacitors based on electrochemically ...
A simple approach for growing porous electrochemically reduced graphene oxide (pErGO) networks on copper wire, modified with galvanostatically deposited copper foam is demonstrated. The as ...
Freestanding Three-Dimensional Graphene/MnO2 …
Graphene-based flexible supercapacitors are one of the most promising candidates because of their intriguing features. In this report, we describe the use of freestanding, lightweight (0.75 mg/cm 2 ), ultrathin (<200 μm), …
Three-dimensional network of graphene for electrochemical …
This review summarizes the preparation methods of 3D network graphene materials, including techniques like chemical vapor deposition, graphene oxide …
Integrating three-dimensional graphene/Fe
Integrating three-dimensional graphene/Fe 3 O 4 @C composite and mesoporous Co(OH) 2 nanosheets arrays/graphene foam into a superior asymmetric electrochemical capacitor† Huanwen Wang, ab Hui Teng Tan, a Huan Yi, c Yu Zhang, a Guilue Guo, a Xuefeng Wang,* c Srinivasan Madhavi * ab and Qingyu Yan * ab
Graphene for batteries, supercapacitors and beyond
Various unique macroscopic assemblies of graphene can be prepared that cover all ''four'' dimensions, in the form of quantum dots (0D), wires (1D), films (2D), monoliths (3D), and potentially 4D ...
Three-dimensional porous graphene/polyaniline composites …
We report an electrochemical co-deposition method to prepare three-dimensional (3D) porous composites of reduced graphene oxide (rGO) and polyaniline (PANI) with pores vertically oriented on the surfaces of current collectors and used as an electrode material for electrochemical capacitors (ECs). These compo
Recent trends in graphene supercapacitors: from large area to ...
This review describes how 3-dimensional porous graphene electrodes have been improved recently, from using large area processing techniques to microsupercapacitors. ... their functionalization with different pseudocapacitive and electric double-layer capacitor materials to obtain higher capacitance values will be the topics discussed in this ...
Dielectric capacitors with three-dimensional nanoscale ...
The local electric field and charge distribution in the new capacitors (fig. S2) are simulated using the finite element method [the dielectric constant value of Al 2 O 3 is around 9 ], and the calculated capacitance for a 1-μm-thick membrane can reach up to 9.8 μF/cm 2, being similar to that of the MIM capacitors .
Functional Three-Dimensional Graphene/Polymer Composites
Integration of graphene with polymers to construct three-dimensional porous graphene/polymer composites (3DGPCs) has attracted considerable attention in the past few years for both fundamental studies and diverse technological applications. With the broad diversity in molecular structures of graphene and polymers via rich chemical …
Three-dimensional Graphene with MoS 2 Nanohybrid …
Well-constructed single-layer molybdenum disulfide nanorose cross-linked by three dimensional-reduced graphene oxide network for superior water splitting and lithium storage property. Sci. …
Construction of three-dimensional graphene like carbon on …
Three-dimensional carbons like 3D graphene, carbon fiber papers or carbon cloth, have attracted considerable attentions [6, 26].Many recently reported 3D carbons are hard to meet the above requirements simultaneously [[27], [28], [29]].For example, 3D graphene may show high surface area and good conductivity [7].But it …
Three-dimensional network of graphene for electrochemical …
Benefiting from the excellent electrochemical and electrocatalytic effects of Co 3 O 4 nanowires, the specific capacitance of graphene foam @ Co 3 O 4 nanowires can reach 768 F g −1 at a current density of 10 A g −1 and increase to around 1150 F g −1 …
3-Dimensional Graphene Carbon Nanotube Carpet …
In this research, 3-dimensional (3D) graphene/carbon nanotube carpets (G/CNTCs)-based microsupercapacitors (G/CNTCs-MCs) were fabricated in situ on nickel electrodes. The G/CNTCs-MCs show …
Enhanced electrochemical performance of three-dimensional graphene ...
In this work, we developed a facile route to synthesize three-dimensional graphene/carbon nanotube (3DG/CNT) hybrids as electrodes for binder-free electrical double layer capacitor (EDLC) by using ...
Graphene-based in-plane micro-supercapacitors with high power …
Nevertheless, micro-supercapacitors that integrate the advantages of the ultrahigh power density of an electrolytic capacitor (10 2 –10 3 W cm −3) and the high-energy delivery of a thin-film ...
Fabrication and electrochemical characterization of super-capacitor ...
We have demonstrated a three-dimensional composite structure of graphene and carbon nanotubes as electrodes for super-capacitors. The goal of this study is to fabricate and test the vertically grown carbon nanotubes on the graphene layer acting as a spacer to avoid self-aggregation of the graphene layers while realizing high active …