Electrochemical Properties of the Composites Synthesized From Polyaniline and Modified MWCNT

Kovalyshyn, Yaroslav; Konovska, M.; Milanese, Chiara; Saldan, Ivan; Serkiz, R.; Pereviznyk, О.; Reshetnyak, Оleksandr; Кuntyi, О. І.

doi:10.23939/chcht11.03.261

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Потенціал робочого електрода -1,00 В. Синтез проводили протягом часу, необхідного для повного окиснення Ан. Після закінчення синтезу композити промивали дистильованою водою і сушили 12 годин у вакуумній шафі за тиску 0,01 атм і температури 70 °С [14].…”

Section: методика експериментуunclassified

Capacitive Properties of Modified and Non Modified Thermally Expanded Graphite Composites With Polyaniline

Kovalyshyn¹,

TERENYAK²,

Pereviznyk³

2020

Proc. Shevchenko Sci. Soc. Chem. Sci.

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Modified thermally exfoliated graphite with p-nitrophenyldiazonium tetrafluoroborate, followed by reduction of nitrophenyl groups to aminophenyl ones. Composites PAN - graphite, PAN - modified graphite at a constant value of potential 1 V were synthesized by electrochemical method. Their conditional density and electrical conductivity were determined. The electrochemical behavior in 1 M HCl solution was investigated and the capacity of synthesized composites was calculated. The conditional density of PAN composites with modified and non modified graphite increases sharply with increasing graphite content from 0 to 5%. At graphite contents higher than 5%, the density of composites varies very slightly. In the range of graphite contents 0% - 20%, the density is the highest for composites with a graphite content of 5% - 10%. In the case of modified graphite, the density of composites is higher than that of composites with non modified graphite. Analysis of the dependence of the specific conductivity on the content of modified graphite indicates that the conductivity of PAN - graphite composites increases the most with increasing graphite content from 1 to 10%. In this interval, the conductivity increases linearly. This indicates the absence of specific interactions between the components in the synthesized composites, as well as the fact that the nature of the distribution of these components does not change with changes in the graphite content. For a composite with modified graphite, there are two maximum capacities of composites with a graphite content of 2 and 10%. For a composite with non modified graphite on the obtained curves there is a maximum capacity of composites with a graphite content of 2%. Modification of the graphite surface leads to increased interaction between the components of the compo¬site, which resulted in the compaction of its structure. As a result, the capacitive characteristics of modified graphite composites, as well as CVA currents and electrical conductivity, were lower compared to composites with non modified graphite.

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Section: методика експериментуunclassified

Capacitive Properties of Modified and Non Modified Thermally Expanded Graphite Composites With Polyaniline

Kovalyshyn¹,

TERENYAK²,

Pereviznyk³

2020

Proc. Shevchenko Sci. Soc. Chem. Sci.

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“…In view of this, the performance of composite materials shows better performance than single components, based on the excellent synergistic effect of the combination of CNTs and PANI [1,26]. Similarly, with CNTs, the new type of carbon nanomaterial CQDs also have a large specific surface area [27] and good electrical conductivity [28]. In addition, it provides more space for electron transport and storage compared with CNTs.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Properties of Functionalized Multi-Walled Carbon Nanotubes @ Carbon Quantum Dots @ Polyaniline Ternary Composite Electrode Materials

Wang

Chen

et al. 2020

Applied Sciences

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Based on various carbon nano materials, the ternary composite functionalized carbon nanotubes (FMWCNTs) @ carbon quantum dots (CQDs) @ polyaniline (PANI) was prepared by in-situ polymerization and hydrothermal method. The carbon-based material was made into an electrode sheet. The morphology and microscopic nanostructures were characterized by FTIR, field emission scanning electron microscopy and field emission transmission electron microscopy. Cyclic voltammetry and the galvanostatic charge discharge method was adapted to study the electrochemical properties of these active materials. Our results showed that the specific capacitance of FMWCNTs @ CQDs @ PANI was as high as 534 F/g, while it was 362 F/g, 319 F/g and 279 F/g for PANI @ FMWCNTs, PANI @ CQDs and polyaniline. This means that the specific capacitance of FMWCNTs @ CQDs @ PANI is increased by 47.5%, 67.4% and 91.4% comparing with the capacitance of PANI @ FMWCNTs, PANI @ CQDs and polyaniline, respectively. Moreover, the specific capacitance retention rate of the ternary active electrode after 1000 times of constant current charge and discharge cycle reached 86%, while it was 60% for PANI @ FMWCNTs, 72% for PANI @ CQDs and 65% for polyaniline.

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Synthesis and Electrochemical Properties of Polyaniline Composites

Kovalyshyn

Tereniak

Saldan

et al. 2020

2020 IEEE 10th International Conference Nanomaterials: Applications &Amp; Properties (NAP)

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Electrochemical Properties of the Composites Synthesized From Polyaniline and Modified MWCNT

Cited by 3 publications

References 11 publications

Capacitive Properties of Modified and Non Modified Thermally Expanded Graphite Composites With Polyaniline

Capacitive Properties of Modified and Non Modified Thermally Expanded Graphite Composites With Polyaniline

Preparation and Electrochemical Properties of Functionalized Multi-Walled Carbon Nanotubes @ Carbon Quantum Dots @ Polyaniline Ternary Composite Electrode Materials

Synthesis and Electrochemical Properties of Polyaniline Composites

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