Active carbon/graphene hydrogel nanocomposites as a symmetric device for supercapacitors

Ateş, Murat; Cinar, Damla; Çalışkan, Sinan; Geçgel, Ünal; Üner, Osman; Bayrak, Yüksel; Candan, İdris

doi:10.1080/1536383x.2016.1174115

Cited by 14 publications

(9 citation statements)

References 42 publications

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“…Its porosity facilitated the diffusion of redox active species and the transport of ions within electrolyte, leading to enhanced conductivity. Similar porosity effect has been reported for the graphene embedded in the hydrogel electrolyte, and also the conductivity and electrochemical stability of the composite electrode were improved, especially at high carbon loading [74]. The pAAm/pMBAA hydrogel without nanostructured carbons exhibited lower conductivity and stability.…”

Section: Electrochemical Analysis: Conductivity and Interfacial Gravisupporting

confidence: 81%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

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In this study, we optimized the dispersion of hydrophobic carbons within ionically conductive hydrogels composed of a poly (acrylamide)-pAAm/poly (N,N-methylenebisacrylamide)-pMBAA modified with Nafion 117 ®. The carbon-embedded hydrogel films were prepared by in situ UV polymerization of aqueous suspension containing KCl, acrylamide and N,Nmethylenebisacrylamide monomers, the multi-walled-carbon nanotubes, graphene, single-walled carbon nanohorns, and their composites with polypyrrole. These electrodes were translucent, stretchable, ionically and electronically conductive at low carbon content. In addition, they were very flexible, reaching a stretch up to 1475.57% of their initial length. Mechanical characteristics and conductivity were measured at their maximum hydration, corresponding to water uptake of 47.20% after 5 days of curing in humidity chamber. Hydrogels with dispersed carbon demonstrated both ionic and electronic conductivity in hydrated state and electronic conductivity alone when the electrode was dry. Nafion 117 ® acted as a surfactant and played a significant role in the improvement of carbon distribution within the hydrogel due to the hydrophobic-hydrophilic interaction between hydrogel, Nafion and the carbon. This was further correlated with changes in zeta potential at the carbon-hydrogel interface upon addition of Nafion, measured using a rotating disk electrode voltammetry.

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Section: Electrochemical Analysis: Conductivity and Interfacial Gravisupporting

confidence: 81%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

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“…There was some 3.87 times increase in specific capacitance for GH/AC as compared to GH electrodes. It also presents excellent cycle life i. e. 99.8% specific capacitance retention after 1000 charge/discharge processes …”

Section: Hydrogels For Supercapacitorsmentioning

confidence: 99%

“…To address these issues various research groups have employed many strategies like self‐cross linking, fabrication of metal/metal oxide nanoparticles, supramolecular inspired synthesis of hydrogels, graphene quantum dots (GQDs) etc . Duan et al reported an asymmetric supercapacitor consisting graphene hydrogel (GH) with 3D interconnected pores as negative electrode and MnO 2 nanoplate on nickel foam as positive electrode.…”

Section: Synthetic Approaches For Selected Hydrogelsmentioning

confidence: 99%

“…The excellent electrocatalytic activity and durability in alkaline solution makes this carbon sample a potential substituent for oxygen reduction reaction in fuel cells and metal/air batteries . Active carbon/graphene hydrogel nanocomposite was synthesised by a research group using one step thermal exfoliation method . The utilization of waste like Elaeagnus stone with GO help in the formation of 3D graphene incorporated hierarchical porous activated carbon.…”

Section: Synthetic Approaches For Selected Hydrogelsmentioning

confidence: 99%

“…The utilization of waste like Elaeagnus stone with GO help in the formation of 3D graphene incorporated hierarchical porous activated carbon. This nanocomposite provides huge specific surface area for dispersing activated carbon, which can efficiently increase the kinetics for charge transfer as well as ion transport throughout the electrode …”

Section: Synthetic Approaches For Selected Hydrogelsmentioning

confidence: 99%

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Hydrogels: Promising Energy Storage Materials

Savan

Veer

2018

ChemistrySelect

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Energy is essential for the economic growth of any country. There is a strong demand for the development of materials that can show potential towards higher power density and energy density. In this article, a promising class of polymeric materials, hydrogels have been discussed as an energy storage material. The hydrogels are advantageous as they possess in them the unique combination of organic conductors and conventional polymers. The article covers the synthetic approach of hydrogels which includes both the conventional synthesis and the new routes adopted followed by the application of hydrogels as energy storage materials. Finally, the future opportunities and prospects in the development of hydrogels as advanced energy storage materials are highlighted.[a] Dr.

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Parameters influencing the capacitive behavior of carbon composite electrodes: composition, morphology, electrical conductivity, and surface chemistry

Hashempour

Vicenzo

Bahdanchyk

et al. 2018

J Solid State Electrochem

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Active carbon/graphene hydrogel nanocomposites as a symmetric device for supercapacitors

Cited by 14 publications

References 42 publications

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Hydrogels: Promising Energy Storage Materials

Parameters influencing the capacitive behavior of carbon composite electrodes: composition, morphology, electrical conductivity, and surface chemistry

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