Heteroatom‐doped reduced graphene oxide/polyaniline nanocomposites with improved n‐type thermoelectric performance

Ali, Mariamu Kassim; Hessein, Amr; Hassan, Mohsen A.; Ghali, Mohsen; Shaalan, Nagih M.; Nakamura, Kōichi; El‐Moneim, Ahmed Abd

doi:10.1002/app.50852

Cited by 11 publications

(6 citation statements)

References 49 publications

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“…All samples displayed negative Seebeck coefficient value, indicating n‐type semiconductor materials, that is, the main carriers are electrons. The n‐type behavior of PANI may be originated from the transport of chloride ions along the polymer chain 55,56 . The measured Seebeck coefficient reached a maximum value (in module) of −17.02 μVK −1 for the ACR/PANI sample.…”

Section: Resultsmentioning

confidence: 95%

“…The n-type behavior of PANI may be originated from the transport of chloride ions along the polymer chain. 55,56 The measured Seebeck coefficient reached a maximum value (in module) of À17.02 μVK À1 for the ACR/PANI sample. Although the ACR/PANI sample has the lowest electrical conductivity value among the other samples, one of the lowest thermal diffusivity values was also obtained for this composite, which is an advantage for improving thermoelectric properties.…”

Section: Binary Systemsmentioning

confidence: 94%

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Ternary system based on polyaniline, graphene, and acrylic matrix applied to thermoelectric systems

Costa,

Furtado,

Oréfice

2023

J of Applied Polymer Sci

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Thermoelectric (TE) materials have attracted attention for offering a green option for power generation, due to their ability to convert thermal energy into electricity. In recent years, a promising way to achieve efficiency in TE properties has been proposed based on composites of conjugated polymers, such as polyaniline (PANI), and carbon nanomaterials such as graphene (GR). Since polyaniline and GR composites are promising fillers for organic thermoelectric materials (OTE), we expanded their investigations for a ternary system (TS), providing materials with multiple functionalities, and high performance. In this research work, a TS based on an acrylic matrix (ACR), GR, and PANI was successfully prepared through the combination of in situ polymerization of aniline in contact with GR and mechanical mixture of the resulting hybrid with an ACR. Structural and morphological characterization confirmed that GR affected PANI morphology and crystallinity. The band gap determination by Tauc's relation indicated the occurrence of π‐π interaction between the chains and an increase of the electrical conductivity of the composites allowed to infer a synergistic effect. The measured Seebeck coefficient reached a maximum value of −17.02 μVK−1 and the highest power factor obtained was 4.94 μWm−1 K−2 for the ACR/PANI sample, indicating a material with promising thermoelectric properties.

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Section: Resultsmentioning

confidence: 95%

Section: Binary Systemsmentioning

confidence: 94%

Ternary system based on polyaniline, graphene, and acrylic matrix applied to thermoelectric systems

Costa,

Furtado,

Oréfice

2023

J of Applied Polymer Sci

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“…The design was inspired from some recent literature [31,38,39]. The main parts of the apparatus were fabricated from stainless steel for most parts, whereas copper was chosen for the heating element.…”

Section: Thermoelectricmeasurementsmentioning

confidence: 99%

“…There are various types of carbon materials that are commonly used in thermoelectric applications. Some of the key carbon materials are Graphite [1,2], Carbon Nanotubes [30], and Graphene [31,32]. Carbon materials offer unique advantages such as thermal conductivity suppression, enhanced electrical conductivity, band structure tailoring, scalability, and cost-effectiveness.…”

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confidence: 99%

Enhancing the thermoelectric properties for hot-isostatic-pressed Bi2Te3 nano-powder using graphite nanoparticles

Mansour,

Nakamura,

AbdEl-Moneim

2024

J Mater Sci: Mater Electron

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Bismuth telluride (Bi2Te3) is a promising thermoelectric material produced commercially. However, its poor electrical conductivity and low figure of merit, caused by grain boundaries and high thermal conductivity, limit its effectiveness in powder metallurgy production. Herein, effects of adding Graphite nanoparticles (GTNPs) to Bi2Te3 on thermoelectric properties were studied. Three ratios of GTNPs (0.2, 0.35, 0.5 wt%) were added to ball-milled Bi2Te3 nano-powder. The hot isostatic pressing (HIP) sintering technique was employed to prepare the pristine Bi2Te3 and the BT-xGTNPs samples for testing. The crystallographic measurements showed a reduction in the crystallinity of the BT-xGTNPs samples compared to the pure Bi2Te3, whereas the electron microscopy measurements showed smaller grain sizes. This was also confirmed with an increase in the samples’ relative density implying the formation of nano-sized grains. Full electrical, thermal, and thermoelectric measurements were performed and comprehensively discussed in this report for all samples in the temperature range from room temperature (RT) to 570 K. The measurements demonstrated an enhancement for x = 0.35 wt% GTNPs at 540 K up to 43% in the power factor and 51% in the ZT compared to pristine Bi2Te3, which was attributed to the optimum grain size, the lower grain boundaries, and better electrical and thermal conductivity aroused from the precise addition of GTNPs. The best electrical conductivity of ~ 8.2 × 104 S/m and lowest thermal conductivity of ~ 1 W/m·K for the Bi2Te3-containing 0.35 wt% GTNPs at RT even though the sample with 0.5 wt% attained the highest Seebeck coefficient of 154 µV/T at 540 K.

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“…72 These results can caused by the π-π* interactions of the heteroatom-doped graphene oxides added to the medium with the PANI chains. 73 Cl-doped graphene oxide generated the highest drop in the charge transfer value of PANI among the S, N, and Cl separately doped graphene oxide materials (Table I). While the Rct value was 11.14 in the PANI electrode, this value was 5.691 in the PANI/Cl-GO composite electrode synthesized with the addition of Cl-GO.…”

Section: Electrochemical Performance Of Supercapacitor Electrodes-mentioning

confidence: 99%

S, N and Cl Separately Doped Graphene Oxide/Polyaniline Composites for Hybrid Supercapacitor Electrode

Yazar¹,

Arvas²,

Şahin³

2022

J. Electrochem. Soc.

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Conducting polymer and carbon-based materials are important in supercapacitor applications as capacitive materials. However, the use of these materials alone limits their application due to poor rate capability and short lifetime or low capacitance. Herein, the supercapacitor electrodes were successfully synthesized by two step process on the carbon-felt. Firstly, S-GO, N-GO and Cl-GO was obtained by chronoamperometry method at room temperature. After, PANI composites were synthesized through a hydrothermal method with S, N and Cl heteroatom doped graphene oxide powders. The best specific capacitance for Cl-GO doped PANI (PANI/Cl-GO) electrode reaches 1217 mFcm−2 (608.3 Fg-1) at 4 A g−1 and, significantly higher that the results of PANI and other hybrids. Moreover, the symmetric supercapacitor using PANI/Cl-GO electrodes demonstrates excellent long-life performance after 5000 cycle (96.9 %). The device has a maximum energy density of 42.8 Wh kg-1 while delivering a power density of 250 W kg-1.

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Heteroatom‐doped reduced graphene oxide/polyaniline nanocomposites with improved n‐type thermoelectric performance

Cited by 11 publications

References 49 publications

Ternary system based on polyaniline, graphene, and acrylic matrix applied to thermoelectric systems

Ternary system based on polyaniline, graphene, and acrylic matrix applied to thermoelectric systems

Enhancing the thermoelectric properties for hot-isostatic-pressed Bi2Te3 nano-powder using graphite nanoparticles

S, N and Cl Separately Doped Graphene Oxide/Polyaniline Composites for Hybrid Supercapacitor Electrode

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