Performance dependence of electrochemical capacitor on surface morphology for vertically aligned graphene nanosheets

The electrospun nanofiber/graphene composites is a promising candidate in the field of flexible strain sensors due to the synergic effect of graphene and the nanofibers. It is an effective way to synthesize a uniform graphene-embedded film by simultaneously electrospinning nanofibers and electrospraying graphene nanosheets. In this paper, we prepare two specimens of different materials to study the interaction between graphene nanosheets and nanofibers under the same process parameters, such as thermoplastic urethane (TPU), polyacrylonitrile (PAN). Then, morphology and mechanical properties are used to characterize the interaction. The mechanical test was conducted by the tensile tester, and the surface morphology of electrospun nanofibrous films was observed through a microscope. By comparing these results, the properties of the graphene nanosheets embedded to different nanofibers are explored. This study provides a good way to select an appropriate nanofiber matrix for the application in flexible strain sensors.

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Vertically aligned tree-like carbon nanostructure as an electrode of the electrochemical capacitor

Journal of Solid State Electrochemistry ◽

10.1007/s10008-019-04253-1 ◽

2019 ◽

Vol 23 (5) ◽

pp. 1605-1611

Author(s):

Monalisa Ghosh ◽

G. Mohan Rao

Keyword(s):

Electrochemical Capacitor ◽

Carbon Nanostructure ◽

Vertically Aligned

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Engineering high-defect densities across vertically-aligned graphene nanosheets to induce photocatalytic reactivity

Carbon ◽

10.1016/j.carbon.2020.05.058 ◽

2020 ◽

Vol 168 ◽

pp. 32-41 ◽

Cited By ~ 1

Author(s):

Albert Guirguis ◽

Shyam R. Polaki ◽

Gopinath Sahoo ◽

Subrata Ghosh ◽

Mohammed Kamruddin ◽

...

Keyword(s):

Graphene Nanosheets ◽

Vertically Aligned ◽

Defect Densities ◽

High Defect Densities

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Enzymatic biosensing by covalent conjugation of enzymes to 3D-networks of graphene nanosheets on arrays of vertically aligned gold nanorods: Application to voltammetric glucose sensing

Microchimica Acta ◽

10.1007/s00604-018-2722-9 ◽

2018 ◽

Vol 185 (3) ◽

Cited By ~ 7

Author(s):

Mozhdeh Mazaheri ◽

Abdolreza Simchi ◽

Hossein Aashuri

Keyword(s):

Gold Nanorods ◽

Graphene Nanosheets ◽

Glucose Sensing ◽

Vertically Aligned ◽

3D Networks

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Vertically aligned graphene nanosheets on silicon using an ionic liquid electrolyte: towards high performance on-chip micro-supercapacitors

Journal of Materials Chemistry A ◽

10.1039/c5ta04578a ◽

2015 ◽

Vol 3 (38) ◽

pp. 19254-19262 ◽

Cited By ~ 47

Author(s):

David Aradilla ◽

Marc Delaunay ◽

Saïd Sadki ◽

Jean-Michel Gérard ◽

Gérard Bidan

Keyword(s):

High Performance ◽

Electron Cyclotron Resonance ◽

Graphene Nanosheets ◽

Chemical Vapor ◽

Liquid Electrolyte ◽

Silicon Substrates ◽

Ionic Liquid Electrolyte ◽

Vertically Aligned ◽

On Chip ◽

Resonance Plasma

Vertically oriented graphene nanosheets were synthesized by an alternative and simple approach based on electron cyclotron resonance-plasma enhanced chemical vapor deposition (ECR-CVD) onto highly doped silicon substrates.

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Direct Growth of Vertically-Aligned Single-Walled Carbon Nanotubes on Conducting Substrates using Ethanol for Electrochemical Capacitor

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v14i3.106 ◽

2011 ◽

Vol 14 (3) ◽

pp. 173-178 ◽

Cited By ~ 12

Author(s):

Mohd Asyadi Azam ◽

Akihiko Fujiwara ◽

Tatsuya Shimoda

Keyword(s):

Carbon Nanotubes ◽

Metal Layer ◽

Chemical Vapor ◽

Electrochemical Capacitor ◽

Single Walled Carbon Nanotubes ◽

Electrochemical Analysis ◽

Quality Level ◽

Single Walled Carbon ◽

Vertically Aligned ◽

Walled Carbon Nanotubes

A massive growth of vertically-aligned single-walled carbon nanotubes (VA-SWCNTs) from aluminum oxide (Al-O)-supported Co catalyst and high purity ethanol was performed using alcohol catalytic chemical vapor deposition (ACCVD) technique. SWCNTs with 50-μm thickness were grown on the substrates via this technique. The Al metal layer of 20 nm thickness was thermally-oxidized for the production of Al-O, and 0.5 nm cobalt (Co) thin films was used as catalyst for the CVD process. The CNT growth was optimized using SiO2/Si substrates, and similar experimental condition was applied to the conducting substrates. The as-grown CNTs were characterized using Raman spectroscopy and electron microscopies for growth confirmation and for quality level investigation. Development of the catalyst nanoparticles and Al-O support layer was observed using atomic force microscopy (AFM) and transmission electron microscopy (TEM). The electrodes were fabricated using directly-grown VA-SWCNTs on SUS 310S, and were successfully used as an electrochemical capacitor. Electrochemical analysis using KOH aqueous electrolyte was performed by cyclic voltammetric (CV) and galvanostatic chargedischarge measurements; a maximum 52 Fg-1 specific gravimetric capacitance was obtained from the VA-SWCNT electrodes.

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