Synergistic Interactions in Sequential Process Doping of Polymer/Single‐Walled Carbon Nanotube Nanocomposites for Enhanced n‐Type Thermoelectric Performance

Lin, Po‐Shen; Lin, Jhih‐Min; Tung, Shih‐Huang; Higashihara, Tomoya; Liu, Cheng‐Liang

doi:10.1002/smll.202306166

Cited by 9 publications

(3 citation statements)

References 64 publications

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“…The downshift of the bands occurred because of the effective surfactant doping. Similar phenomena have been observed in other doped materials [65].…”

Section: Structural Properties Of Swcnt Layerssupporting

confidence: 89%

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Stretchable and Flexible Painted Thermoelectric Generators on Japanese Paper Using Inks Dispersed with P- and N-Type Single-Walled Carbon Nanotubes

Nakajima,

Hoshino,

Yamamoto

et al. 2024

Sensors

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As power sources for Internet-of-Things sensors, thermoelectric generators must exhibit compactness, flexibility, and low manufacturing costs. Stretchable and flexible painted thermoelectric generators were fabricated on Japanese paper using inks with dispersed p- and n-type single-walled carbon nanotubes (SWCNTs). The p- and n-type SWCNT inks were dispersed using the anionic surfactant of sodium dodecylbenzene sulfonate and the cationic surfactant of dimethyldioctadecylammonium chloride, respectively. The bundle diameters of the p- and n-type SWCNT layers painted on Japanese paper differed significantly; however, the crystallinities of both types of layers were almost the same. The thermoelectric properties of both types of layers exhibited mostly the same values at 30 °C; however, the properties, particularly the electrical conductivity, of the n-type layer increased linearly, and of the p-type layer decreased as the temperature increased. The p- and n-type SWCNT inks were used to paint striped patterns on Japanese paper. By folding at the boundaries of the patterns, painted generators can shrink and expand, even on curved surfaces. The painted generator (length: 145 mm, height: 13 mm) exhibited an output voltage of 10.4 mV and a maximum power of 0.21 μW with a temperature difference of 64 K at 120 °C on the hot side.

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“…The downshift of the bands occurred because of the effective surfactant doping. Similar phenomena have been observed in other doped materials [65].…”

Section: Structural Properties Of Swcnt Layerssupporting

confidence: 89%

“…The downshift of the bands occurred because of the effective surfactant doping. Similar phenomena have been observed in other doped materials [65]. The Raman spectra of the p-and n-type SWCNT layers are shown in Figure 3.…”

Section: Structural Properties Of Swcnt Layerssupporting

confidence: 84%

Stretchable and Flexible Painted Thermoelectric Generators on Japanese Paper Using Inks Dispersed with P- and N-Type Single-Walled Carbon Nanotubes

Nakajima,

Hoshino,

Yamamoto

et al. 2024

Sensors

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show abstract

“…In addition, the elevating the dislocation density can result in a reduction of carrier mobility within the CuCrO2 system, ultimately leading to a diminished power factor [19]. While resistivity plays a role in hindering electrical conductivity, the Seebeck coefficient influences the ability of the material to generate a voltage gradient [28,30]. Optimizing this delicate balance is key to enhancing thermoelectric efficiency.…”

Section: Resultsmentioning

confidence: 99%

Effect of calcination frequency on the thermoelectric properties of Ti doped CuCrO2 by solid state method

BONARDO,

DARSONO,

HUMAIDI

et al. 2023

J Met Mater Miner

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In this study, the influence of titanium oxide (TiO2) dopants and varying calcination processes on the thermoelectric properties of CuCrO2 was systematically explored. It was emphasized that these factors were not only affecting dislocation density but also exerting a profound influence on thermoelectric performance through the modulation of Seebeck coefficient and resistivity. The findings highlighted CrT-2, which incorporated TiO2 and underwent a two-time calcination process, as the top-performing sample in terms of power factor values, underscoring the significance of TiO2 as a dopant for enhancing thermoelectric efficiency. Conversely, Cr-4, exposed to four calcination cycles, exhibited slightly lower power factor values compared to Cr-2. Notably, CrT-4, despite containing the titanium dopant, showed the lowest power factor values, potentially due to intricate interactions between the dopant and the extended calcination process. These results underscore the intricate interplay between dopants, calcination processes, and thermoelectric performance in CuCrO2, necessitating precise optimization to achieve the desired material efficiency.

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Achieving High zT with Carbon Nanotube/Conjugated Microporous Polymer Thermoelectric Nanohybrids by Meticulous Molecular Geometry Design

Lin,

Mohamed,

Lin

et al. 2024

Adv Funct Materials

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Conjugated microporous polymers (CMPs) are characterized by high physical and chemical stabilities along with low thermal conductivities due to their conjugated microporous frameworks, making them promising candidates for thermoelectric application. However, the advancement of CMPs within the thermoelectric field is considerably hampered by their inadequate electrical conductivity and unfavorable processability. Herein, highly‐conducting carbon nanotubes (CNTs) are dispersed in two solvents (1,2‐dichlorobenzene and N‐methyl‐2‐pyrrolidone) to fabricate p‐ and n‐type CNT/CMP nanohybrids. Additionally, two unique CMPs are synthesized to elucidate the impacts of the chemical structures and pore architectures on the thermoelectric properties of the nanohybrids. Finally, due to the differing steric hindrance effects of the two CMPs, the thermoelectric performance can be tuned under varying circumstances. The synergetic effects of low thermal conductivity and efficient dispersion capability of the CMPs yield optimized figure of merit (zT) values of 0.053 and 0.13 at 303 K for the p‐ and n‐type thermoelectric nanohybrids, respectively. This investigation presents an alternative approach to building high zT p‐ and n‐type thermoelectric CNT/CMP nanohybrids operating near ambient temperature via the solvent doping effect and chemical structure design of the CMPs, thereby establishing CMP‐based materials as promising candidates for thermoelectric application.

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Synergistic Interactions in Sequential Process Doping of Polymer/Single‐Walled Carbon Nanotube Nanocomposites for Enhanced n‐Type Thermoelectric Performance

Cited by 9 publications

References 64 publications

Stretchable and Flexible Painted Thermoelectric Generators on Japanese Paper Using Inks Dispersed with P- and N-Type Single-Walled Carbon Nanotubes

Stretchable and Flexible Painted Thermoelectric Generators on Japanese Paper Using Inks Dispersed with P- and N-Type Single-Walled Carbon Nanotubes

Effect of calcination frequency on the thermoelectric properties of Ti doped CuCrO2 by solid state method

Achieving High zT with Carbon Nanotube/Conjugated Microporous Polymer Thermoelectric Nanohybrids by Meticulous Molecular Geometry Design

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