scholarly journals Lightweight, interconnected VO2 nanoflowers hydrothermally grown on 3D graphene networks for wide-voltage-window supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35558-35564 ◽  
Author(s):  
Junya Wang ◽  
Xuetao Zhang ◽  
Yue Zhang ◽  
Asim Abas ◽  
Xiaohua Zhao ◽  
...  
Keyword(s):  
Three Dimensional ◽  
High Conductivity ◽  
Supercapacitor Electrode ◽  
3D Graphene

Highly stable and interconnected VO2 nanoflowers were uniformly grown on flexible three dimensional graphene networks, which directly served as a lightweight and high conductivity supercapacitor electrode (VO2 NF@3DG).

Electrodeposition of polyaniline on three-dimensional graphene hydrogel as a binder-free supercapacitor electrode with high power and energy densities

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 58854-58861 ◽  
Author(s):  
Shuya Gao ◽  
Li Zhang ◽  
Yadong Qiao ◽  
Pei Dong ◽  
Jun Shi ◽  
...  
Keyword(s):  
High Power ◽  
Three Dimensional ◽  
High Energy ◽  
Supercapacitor Electrode ◽  
3D Graphene ◽  
Binder Free ◽  
Power And Energy ◽  
Power Densities

3D graphene hydrogel (GH) provides a promising support for electrodepositing PANI, and the supercapacitor based on GH/PANI conformal heterostructure displays high energy and power densities.

scholarly journals Cauliflower-Like Co3O4/Three-Dimensional Graphene Composite for High Performance Supercapacitor Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Huili Liu ◽  
Xinglong Gou ◽  
Yi Wang ◽  
Xuan Du ◽  
Can Quan ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Constant Current ◽  
Supercapacitor Electrode ◽  
3D Graphene ◽  
Graphene Composite ◽  
Transmission Electron ◽  
Constant Current Charge ◽  
Supercapacitor Electrode Materials

Cauliflower-like Co3O4/three-dimensional (3D) graphene nanocomposite material was synthesized by a facile two-step synthesis route (heat reduction of graphite oxide (GO) and hydrothermal synthesis of Co3O4). The phase composition, morphology, and structure of the as-obtained products were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). Electrochemical properties as supercapacitor electrode materials were systematically investigated by cyclic voltammetry (CV) and constant current charge-discharge tests. It was found that the Co3O4/3D graphene composite showed a maximum specific capacitance of 863 F g−1, which was obtained by means of CVs at a scan rate of 1 mV s−1in 6 M KOH aqueous solution. Moreover, the composite exhibited improved cycling stability after 1,000 cycles. The good supercapacitor performance is ascribed to the combination of 3D graphene and cauliflower-like Co3O4, which leads to a strong synergistic effect to remarkably boost the utilization ratio of Co3O4and graphene for high capacitance.

Three-dimensional graphene/polyimide composite-derived flexible high-performance organic cathode for rechargeable lithium and sodium batteries

2017 ◽  
Vol 5 (6) ◽  
pp. 2710-2716 ◽  
Author(s):  
Yanshan Huang ◽  
Ke Li ◽  
Jingjing Liu ◽  
Xing Zhong ◽  
Xiangfeng Duan ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
3D Graphene ◽  
Sodium Batteries ◽  
One Step

A 3D graphene/polyimide composite is fabricated by a one-step solvothermal strategy as a high-performance cathode for both rechargeable lithium and sodium batteries.

Graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43116-43126 ◽  
Author(s):  
Yisi Liu ◽  
Wenzhang Li ◽  
Jie Li ◽  
Haibo Shen ◽  
Yaomin Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Graphene Quantum Dots ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Highly Efficient

In this work, we demonstrate a facile strategy to synthesize a novel three-dimensional (3D) graphene aerogel-supported and graphene quantum dots-modified γ-MnOOH nanotubes as a highly efficient electrocatalyst.

Three-Dimensional Holey-Graphene Architectures for Highly Sensitive Enzymatic Electrochemical Determination of Hydrogen Peroxide

2019 ◽  
Vol 19 (11) ◽  
pp. 7404-7409 ◽  
Author(s):  
Aihua Jing ◽  
Gaofeng Liang ◽  
Hao Shi ◽  
Yixin Yuan ◽  
Quanxing Zhan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Peroxide ◽  
Graphene Oxide ◽  
Three Dimensional ◽  
Electrochemical Determination ◽  
High Specific Surface Area ◽  
3D Graphene ◽  
Practical Applications ◽  
Transmission Electron ◽  
Mild Defect

Three-dimensional (3D) graphene with high specific surface area, excellent conductivity and designed porosity is essential for many practical applications. Herein, holey graphene oxide with nano pores was facilely prepared via a convenient mild defect-etching reaction and then fabricated to 3D nanostructures via a reduction method. Based on the 3D architectures, a novel enzymatic hydrogen peroxide sensor was successfully fabricated. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to characterize the 3D holey graphene oxide architectures (3DHGO). Cyclic voltammetry (CV) was used to evaluate the electrochemical performance of 3DHGO at glassy carbon electrode (GCE). Excellent electrocatalytic activity to the reduction of H2O2 was observed, and a linear range of 5.0×10-8~5.0×10-5 M with a detection limit of 3.8×10-9 M was obtained. These results indicated that 3DHGO have potential as electrochemical biosensors.

Highly conductive three-dimensional MnO2–carbon nanotube–graphene–Ni hybrid foam as a binder-free supercapacitor electrode

Nanoscale ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1085 ◽  
Author(s):  
Guoyin Zhu ◽  
Zhi He ◽  
Jun Chen ◽  
Jin Zhao ◽  
Xiaomiao Feng ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Three Dimensional ◽  
Supercapacitor Electrode ◽  
Binder Free ◽  
Hybrid Foam

Fabrication of a flexible and stretchable three-dimensional conductor based on Au–Ni@graphene coated polyurethane sponge by electroless plating

2018 ◽  
Vol 6 (30) ◽  
pp. 8135-8143 ◽  
Author(s):  
Fei Han ◽  
Xingyu Su ◽  
Mingqi Huang ◽  
Jinhui Li ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Electroless Plating ◽  
Three Dimensional ◽  
3D Graphene ◽  
Polyurethane Sponge

A flexible and stretchable 3D graphene-coated polyurethane sponge-based conductor was fabricated by electroless plating and vacuum encapsulation. The fabricated flexible conductor exhibited high conductive stability in different deformation states.

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