Investigation of double-layer and pseudocapacitance of surface-modified ionic liquid-functionalized graphene oxide

Movil, Omar; Schadeck, Cesar

doi:10.1016/j.jelechem.2015.07.047

Cited by 16 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that supercapacitors that use either Gra or GO might have a similar energy performance, disregarding pseudocapacitance that is typical of GO supercapacitors. 47 The supercapacitors built with imidazolium-based ILs and GO electrodes have capacitances of similar magnitudes as those calculated by Salanne et al 33 in their simulations of the coarse-grained model of ILs confined to Gra electrodes. However, in the GO supercapacitors, the capacitances of both electrodes are the same, being not capable to capture properly the effect of the ion size.…”

Section: Resultssupporting

confidence: 64%

“…In spite of ions’ structuring differences on the surface of the electrodes, their capacitances are very similar. This indicates that supercapacitors that use either Gra or GO might have a similar energy performance, disregarding pseudocapacitance that is typical of GO supercapacitors . The supercapacitors built with imidazolium-based ILs and GO electrodes have capacitances of similar magnitudes as those calculated by Salanne et al in their simulations of the coarse-grained model of ILs confined to Gra electrodes.…”

Section: Resultssupporting

confidence: 53%

See 1 more Smart Citation

Comparing Graphite and Graphene Oxide Supercapacitors with a Constant Potential Model

2021

View full text Add to dashboard Cite

Electric double-layer capacitors store energy because of the adsorption of ions on the surface of electrodes. A realistic model to describe the electrolyte–electrode interface is based on the constant potential method that allows the electrode charges to fluctuate in order to try to mimic the polarization of metallic electrodes [J. Phys. Chem. Lett. 2013, 4, 264–268]. We performed molecular dynamics simulations of graphene oxide (GO) electrodes using the constant potential model comparing carefully the interface structure, polarization, and charging processes of an ionic liquid with the respective properties calculated for graphite electrodes. The layered structure of the ions at the electrode–electrolyte interface is less organized in comparison with that observed for graphite electrodes, which reduces overscreening. With regard to performance in terms of energy storage, graphite performs better than GO in a wide range of applied voltages. The charging dynamics of GO is slower at low applied voltages. At high voltages, the stronger electrostatic interactions between the charged electrode and electrolyte prevail, allowing for similar charging times for both supercapacitors.

show abstract

Section: Resultssupporting

confidence: 64%

Section: Resultssupporting

confidence: 53%

Comparing Graphite and Graphene Oxide Supercapacitors with a Constant Potential Model

2021

View full text Add to dashboard Cite

show abstract

“…In an EDLC with carbon-based materials as an electrode material, the energy storage is derived electrostatically from the charging process [3]. In contrast, pseudocapacitor uses conducting polymers (CP) or metal oxides as electrode materials stores charge via reversible Faradic reaction [4]. In recent times, extensive studies have been carried out to enhance the performance of supercapacitor by varying the electrode materials [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Poly(3,4-ethylenedioxythiophene) Doped with Carbon Materials for High-Performance Supercapacitor: A Comparison Study

Abidin

Azman

Kulandaivalu

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

A comparative study of multiwalled carbon nanotube (MWCNT), graphene oxide (GO), and nanocrystalline cellulose (NCC) as a dopant in the preparation of poly(3,4-ethylenedioxythiophene)- (PEDOT-) based hybrid nanocomposites was presented here. The hybrid nanocomposites were prepared via the electrochemical method in aqueous solution. The FTIR and Raman spectra confirmed the successful incorporation of dopants (MWCNT, GO, and NCC) into PEDOT matrix in the process of formation of the hybrid nanocomposites. It was observed that the choice of the carbon material affected the morphologies and supercapacitive properties of the hybrid nanocomposites. Incorporation of GO with PEDOT produces a paper-like sheet nanocomposite in which the wrinkled surface results in larger surface area compared to the network-like and rod-like structures of PEDOT/MWCNT and PEDOT/NCC, respectively. Owing to larger surface area, PEDOT/GO exhibits the highest specific capacitance (120.13 F/g), low equivalent series resistance (34.44 Ω), and retaining 87.99% of the initial specific capacitance after 1000 cycles, signifying a long-term cycling stability. Furthermore, the high performance of PEDOT/GO is also demonstrated by its high specific energy and specific power.

show abstract

“…2a . 35 The CV curve gradually approached an ideal rectangle and had an excellent double-layer capacitor performance when the amount of hydrazine hydrate was higher than 5.0. Due to the high degree of graphitization of VG, great crystallinity and difficulty of oxidization, 36 the oxidation degree of GO-VG was relatively low.…”

Section: Resultsmentioning

confidence: 93%

The electrochemical performance of reduced graphene oxide prepared from different types of natural graphites

et al. 2021

View full text Add to dashboard Cite

show abstract

Investigation of double-layer and pseudocapacitance of surface-modified ionic liquid-functionalized graphene oxide

Cited by 16 publications

References 50 publications

Comparing Graphite and Graphene Oxide Supercapacitors with a Constant Potential Model

Comparing Graphite and Graphene Oxide Supercapacitors with a Constant Potential Model

Poly(3,4-ethylenedioxythiophene) Doped with Carbon Materials for High-Performance Supercapacitor: A Comparison Study

The electrochemical performance of reduced graphene oxide prepared from different types of natural graphites

Contact Info

Product

Resources

About