Modulating carrier transport for the enhanced thermoelectric performance of carbon nanotubes/polyaniline composites

Li, Hui; Liang, Yuan; Liu, Si-qi; Qiao, Fen; Li, Pengcheng; He, Chaobin

doi:10.1016/j.orgel.2019.03.006

Cited by 49 publications

(36 citation statements)

References 52 publications

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“…53 In contrast to the previous reports, Li et al demonstrated the significantly enhanced TE performance of CNTs/PANI composites at properly low doping degree. 33,34,54,55 As shown in Figure 3, they investigated the effect of doping level which was fine-tuned by decreasing the amount of CSA, on the TE property of SWCNTs/PANI composite films. 33,54 Ascribing to the strong π-π interactions which promote the formation of unique PANI interface layer and the existence of CNT interconnected network which provides conductive pathways to enable efficient carrier transportation, σ was less-decreased accompanied with greatly increased S as doping level decreased, leading to highest PF of μW m -1 K -2 at PANI/CSA mole ratios of 3:1 with CNTs loading of 69 wt%.…”

Section: Doping Engineeringmentioning

confidence: 99%

Recent Advances in Polyaniline-Based Thermoelectric Composites

Liu

et al. 2021

CCS Chem

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Polyaniline (PANI)-based thermoelectric (TE) materials have attracted great attention for flexible electronic energy harvesting devices because of the advantages of solution processibility, excellent environmental stability and low cost. However, the typical opposite dependence between electrical conductivity and Seebeck coefficient impedes their development, and tremendous efforts have been devoted to increasing their TE

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Section: Doping Engineeringmentioning

confidence: 99%

Recent Advances in Polyaniline-Based Thermoelectric Composites

Liu

et al. 2021

CCS Chem

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“…Raman spectra of the pristine SWCNTs and the PEI-doped SWCNTs are shown in Figure 3. The G band (in-plane stretching, E 2g mode) can be attributed to the vibration of sp 2 bonded carbon atoms while the D band corresponds to the vibration of carbon atoms with dangling bonds, which reflects the defects and the disordered structures of the SWCNTs [23,31,32,33]. The D bands of both the pristine and PEI-doped SWCNTs were found at approximately 1337 and 2670 cm −1 (D 1 and D 2 , respectively), while the G bands were located at about 1587 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…The voltage and power generated by the TE generator were measured with a home-built system in an ambient environment and calculated by the temperature difference (Δ T , provided by Peltier devices and determined by T -type thermocouples) and the change in thermal electrical voltage (Δ V , measured with Keithley 2000 multimeter). Then, the output power of the TE generator was obtained as a function of the load resistance ( R ) using the equation P = V 2 / R [31].…”

Section: Methodsmentioning

confidence: 99%

Modulating Carrier Type for Enhanced Thermoelectric Performance of Single-Walled Carbon Nanotubes/Polyethyleneimine Composites

et al. 2019

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Thermoelectric (TE) generators consisting of flexible and lightweight p- and n-type single-walled carbon nanotube (SWCNT)-based composites have potential applications in powering wearable electronics using the temperature difference between the human body and the environment. Tuning the TE properties of SWCNTs, particularly p- versus n-type control, is currently of significant interest. Herein, the TE properties of SWCNT-based flexible films consisting of SWCNTs doped with polyethyleneimine (PEI) were evaluated. The carrier type of the SWCNT/PEI composites was modulated by regulating the proportion of SWCNTs and PEI using simple mixing techniques. The as-prepared SWCNT/PEI composite films were switched from p- to n-type by the addition of a high amount of PEI (>13.0 wt.%). Moreover, interconnected SWCNTs networks were formed due to the excellent SWNT dispersion and film formation. These parameters were improved by the addition of PEI and Nafion, which facilitated effective carrier transport. A TE generator with three thermocouples of p- and n-type SWCNT/PEI flexible composite films delivered an open circuit voltage of 17 mV and a maximum output power of 224 nW at the temperature gradient of 50 K. These promising results showed that the flexible SWCNT/PEI composites have potential applications in wearable and autonomous devices.

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“…Such approach should be considered alongside application of redox process or doping/dedoping of the system as shown in the work by Li. [ 91 ]…”

Section: Panimentioning

confidence: 99%

“…In the frame of the research for the development of advanced TE materials with improved performance, MoS 2 represents a viable candidate, already exploited in the field of photovoltaics. [ 91 ] In fact, 2D MoS 2 can be also utilized as a part of TE composites. In the work by Mombru et al [ 89 ] MoS 2 nanosheets were introduced into the PANI matrix in the 5, 10 and 15 wt % concentrations via suspensions mixing.…”

Section: Panimentioning

confidence: 99%

Polymer‐Based Low‐Temperature Thermoelectric Composites

Yusupov

Vomiero

2020

Adv Funct Materials

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Thermoelectric materials allow direct conversion of waste heat energy into electrical energy, thus contributing to solving energy related issues. Polymerbased materials have been considered for use in heat conversion in the temperature range from 20 to 200 °C, within which conventional materials are not efficient enough, whereas polymers due to their good electronic transport properties, easy processability, non-toxicity, flexibility, abundance, and simplicity of adjustment, are considered as promising materials. Due to the large variety of available polymers and the almost unlimited combinations of possible modifications, the field of polymer-based thermoelectrics is very rapidly developing, already reaching efficiency values close to those of inorganic systems. In the current progress report, the most recent advances in the field are discussed. New approaches to improve thermoelectric performance are described, with a focus on revising the mechanisms to improve the thermoelectric properties of the three most investigated polymer matrixes: poly(3,4-ethylenedioxythiophene) polystyrene sulfonat, poly(3hexylthiophene-2,5-diyl), and polyaniline, alongside the three main paths of optimizing properties: incorporation of carbon-based material and inorganic substances, and treatment with chemical agents. The most promising research in the field is highlighted and thoroughly analyzed. The path toward a lab-to-fab transition for thermoelectric polymers is suggested in perspective.

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Modulating carrier transport for the enhanced thermoelectric performance of carbon nanotubes/polyaniline composites

Cited by 49 publications

References 52 publications

Recent Advances in Polyaniline-Based Thermoelectric Composites

Recent Advances in Polyaniline-Based Thermoelectric Composites

Modulating Carrier Type for Enhanced Thermoelectric Performance of Single-Walled Carbon Nanotubes/Polyethyleneimine Composites

Polymer‐Based Low‐Temperature Thermoelectric Composites

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