KOH modified graphene nanosheets for supercapacitor electrodes

Li, Yueming; Zijll, Marshall van; Chiang, S.; Pan, Ning

doi:10.1016/j.jpowsour.2011.02.092

Cited by 181 publications

(118 citation statements)

References 32 publications

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“…The estimated specific capacitance of the cell (flexible supercapacitor) was 70.4 F g −1 at 5 mV s −1 . The highest specific capacitance (single electrode) of 169 F g −1 was achieved at a current density of 0.1 mA cm −2 ; this value is comparable to those previously reported results for solid-state supercapacitors [45,50,51]. Further, the power and energy densities are two significant parameters to evaluate the performance of the supercapacitor device.…”

Section: Fabrication and Electrochemical Performance Of The Flexible supporting

confidence: 85%

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Fabrication and Characterization of Supercapacitors toward Self-Powered System

Saravanakumar¹,

Kim²

2018

Advancements in Energy Storage Technologies

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Ever increasing energy demand urges to impelled extensive research in the development of new eco-friendly energy harvesting and storage technologies. Energy harvesting technology exploiting renewable energy sources is an auspicious method for sustainable, autonomous, and everlasting operation of a variety of electronic devices. A new concept of an integrated self-powered system by combining an energy harvesting device with an energy storage device has been established to harvest renewable energy and simultaneously store it for sustainable operation of electronic devices. In this chapter, describes the fabrication of a self-powered system by integrating the supercapacitor with energy harvesting devices such as nanogenerator and solar cells to power portable electronic devices. Initially synthesis and electrochemical characterization of various electroactive materials for supercapacitors and further, fabrication of supercapacitor device were discussed. In conclusion, this chapter demonstrates self-powered system by the integration of energy harvesting, energy storage module with portable electronic devices. The various result validates the feasibility of using supercapacitors as efficient energy storage components in self-powered devices. The proposed self-powered technology based on energy conversion of renewable energy to electrical energy which stored in energy storage device and it will be used to operate several electronic devices as a self-powered device.

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Section: Fabrication and Electrochemical Performance Of The Flexible supporting

confidence: 85%

“…The existence of redox peak in GCD curve well agrees with CV curve. The calculated specific capacitances (Figure 3d) [26,36,[44][45][46][47]. The shorter diffusion path, higher conductivity and higher active surface area of the fabricated TRGO electrode enhances the specific capacitance.…”

Section: Electrochemical Characterization Of Trgo-coated Fabric Electmentioning

confidence: 97%

Fabrication and Characterization of Supercapacitors toward Self-Powered System

Saravanakumar¹,

Kim²

2018

Advancements in Energy Storage Technologies

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“…Previous studies on KOH interaction with graphene were limited to its role as an electrolyte [30][31][32] as well as an agent for chemical modification of graphene [33] for supercapacitive applications, or as a processing step to remove graphene from SiO 2 [34,35]. However a comprehensive study on the interaction of KOH processing on the structural and electrical properties of micronsized single layer flakes is missing.…”

mentioning

confidence: 99%

Stability of suspended monolayer graphene membranes in alkaline environment

Miranda

Lorke

2017

Materials Research Letters

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“…However, supercapacitors are now mainly available in two types: (1) Electrochemical Double -Layer Capacitor (EDLC) -EDLCs store charges non-faradically. Mainly carbon based materials like activated carbon, carbon nanotube, graphene are used [13][14][15] as electrode for these type of supercapacitors. Due to high surface area, superior conductivity, high porosity graphene has been considered as an essential candidate for supercapacitor electrode materials.…”

Section: Introductionmentioning

confidence: 99%

“…Due to high surface area, superior conductivity, high porosity graphene has been considered as an essential candidate for supercapacitor electrode materials. On the other hand, addition of carbon nanotubes can significantly enhance the performances of the EDLC due to its unique properties like nanoporosity, high surface area, and high conductivity [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of polypyrrole nanofiber and its enhanced electrochemical performances in different electrolytes

Sahoo¹,

Dhibar²,

Das³

2012

Express Polym. Lett.

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Abstract.A porous nanocomposite based on polypyrrole (PPy) and sodium alginate (SA) has been synthesized by easy, inexpensive, eco-friendly method. As prepared nanocomposite showed fibrillar morphology in transmission electron microscopic (TEM) analysis. The average diameter of ~100 nm for the nanofibers was observed from scanning electron microscopic (SEM) analysis. As prepared nanofiber, was investigated as an electrode material for supercapacitor application in different aqueous electrolyte solutions. PPy nanofiber showed enhanced electrochemical performances in 1 M KCl solution as compared to 1 M Na 2 SO 4 solution. Maximum specific capacitance of 284 F/g was found for this composite in 1 M KCl electrolyte. It showed 76% specific capacitance retention after 600 cycles in 1 M KCl solution. Electrochemical Impedance Spectra showed moderate capacitive behavior of the composite in both the electrolytes. Further PPy nanofiber demonstrated higher thermal stability as compared to pure PPy.

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KOH modified graphene nanosheets for supercapacitor electrodes

Cited by 181 publications

References 32 publications

Fabrication and Characterization of Supercapacitors toward Self-Powered System

Fabrication and Characterization of Supercapacitors toward Self-Powered System

Stability of suspended monolayer graphene membranes in alkaline environment

Facile synthesis of polypyrrole nanofiber and its enhanced electrochemical performances in different electrolytes

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