Graphene oxide films as separators of polyaniline-based supercapacitors

Shul’ga, Yu. M.; Баскаков, С. А.; Смирнов, В. А.; Shul’ga, N. Yu.; Belay, Kalayu; Gutsev, G. L.

doi:10.1016/j.jpowsour.2013.06.094

Cited by 87 publications

(29 citation statements)

References 22 publications

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“…The mechanism of proton conductivity in polymer films has been discussed in previous reports [11,21,22]. It was found that the conductivity depends on film morphology, electrolyte type, humidity, diffusion coefficients of water and protons, temperature, etc.…”

Section: Resultsmentioning

confidence: 95%

“…Therefore, the optimal concentration of sulfuric acid in a fabricated supercapacitor has to be in the range from 1 to 30 % by weight. In our previous work [11], where the properties of a capacitor with GO separators and polyaniline electrodes have been explored, the electrolyte was presented by 1 M H 2 SO 4 , which corresponds to 9.8 % by weight of H 2 SO 4 . The optimal electrolyte composition has to be experimentally determined on the basis of the requirements to supercapacitors to be fabricated.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, it has been suggested [10] that GO can be used as a component of a supercapacitor electrode. In our previous work [11], we fabricated the first supercapacitor by using GO films as separators. A recent study [12] reported on the use of ozonated GO films as efficient protonexchange membranes in fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…A recent study [12] reported on the use of ozonated GO films as efficient protonexchange membranes in fuel cells. The conductivity of GO films was studied [11,13,14] as a function of humidity and solvent type, and it was concluded that GO films are proton conductors.…”

Section: Introductionmentioning

confidence: 99%

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A comparative analysis of graphene oxide films as proton conductors

et al. 2014

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The electrical conductivity of graphene oxide (GO) films in vapors of water and acid solutions is found to be close to the conductivity of a film formed after drying the solution of phenol-2,4-disulfonic acid in polyvinyl alcohol, which is known to be a proton conductor. We found that the conductivity of a GO film in vapors of the H 2 O-H 2 SO 4 electrolyte possesses a sharp maximum at *1 % by weight of sulfuric acid. The highest conductivity of GO films can be expected when placing the films over acid vapors where the acid concentration is essentially lower than in the acid solutions at their maximum conductivity. Since the conductivity of the H 2 O-H 2 SO 4 electrolyte itself has a maximum at *30 % by weight of sulfuric acid, the use of intermediate concentrations of H 2 SO 4 is recommended in practical applications. The GO films permeated with water or acid solution in water are expected to possess the proton-exchange properties similar to those of other proton-exchanging membranes.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A comparative analysis of graphene oxide films as proton conductors

et al. 2014

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“…However, Zabihinpour et al [138] synthesized the multilayer graphene oxide (MGO) nanosheets for supercapacitors, which exhibit 60 F g −1 of total electrode material and capacitance retention of 85 % after 10,000 cycles. In addition, Shulga et al [139] indicated that the deeply oxidized graphene oxide can be used as a separator in supercapacitors composed of polyaniline thin film electrodes, since it has a proton type conductivity after being permeated with a solution of sulfuric acid. This supercapacitors achieves to about 150 F g −1 based on the total weight of whole system (electrode, separator, and electrolyte).…”

Section: Go and Rgomentioning

confidence: 99%

Application of GO in Energy Conversion and Storage

Zhao

Liu

2014

SpringerBriefs in Physics

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The increasing depletion of fossil fuel inspires the demand for renewable energy and energy-efficient devices. GO-based materials emerge in applications of energy storage and conversion with superior advantages. Especially, the composition of GO with specified materials not only retains the inherent characteristics of GO but also induces various characters for improving the performance in energy conversion and storage. Due to the large surface area and ample oxygen containing functional groups, GO can bind many active materials or catalysts for hydrogen storage and generation. Moreover, the functional groups enable GO to further couple with other species and thus form various porous or hierarchical architectures as electrodes, electrolyte or current collector in the lithium batteries and supercapacitors.

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Electrochemical Supercapacitors for Energy Storage and Conversion

Kim

et al. 2015

Handbook of Clean Energy Systems

244

237

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In today's world, clean energy storage devices, such as batteries, fuel cells, and electrochemical capacitors, have been recognized as one of the next‐generation technologies to assist in overcoming the global energy crisis. Electrochemical capacitors, also referred to as supercapacitors , are special types of capacitors possessing fast charging capabilities, long life cycles, and low maintenance costs. As a result, supercapacitors are used in a variety of commercial applications such as emergency backup powers, consumer electronics, and hybrid vehicles. Even though supercapacitors are restricted by its low energy density and high cost challenges, research and development will gradually overcome these limitations. The proposed articles focus on the fundamental theory behind supercapacitors, including the types of supercapacitors and their energy storage supercapacitors, as well as quantify the performance of these devices. Furthermore, the following articles help illuminate the practical aspects of supercapacitors in commercial applications and the current technological progression.

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Graphene oxide films as separators of polyaniline-based supercapacitors

Cited by 87 publications

References 22 publications

A comparative analysis of graphene oxide films as proton conductors

A comparative analysis of graphene oxide films as proton conductors

Application of GO in Energy Conversion and Storage

Electrochemical Supercapacitors for Energy Storage and Conversion

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