Achieving air-stable n-type single-walled carbon nanotubes with high thermoelectric performance by doping with polyethylene glycol and N,N-dimethylferrocenemethylamine

He, Guoliang; Nie, Xiuxiu; Cao, Guibin; Ren, Zhibo; Yang, Jing; Wu, Yufeng; Li, Anqi; Tang, Xuyan; Wu, Jiatao; Wang, Lei; Gao, Chunmei

doi:10.1016/j.compscitech.2023.110043

Cited by 5 publications

(5 citation statements)

References 54 publications

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“…This might be attributed to the actual temperature difference at both ends of the device being smaller than the given value . However, as seen from Table S3, the output power density of the device in our work is comparable to or even higher than that of n-type SWCNT-based thermoelectric materials, which is suitable for powering wearable electronics. ,,,− ,,, …”

Section: Resultsmentioning

confidence: 69%

“…The encapsulation or coating effect of the HDCN4 or HDCN8 polymer chains can act as a protective agent to impede oxygen doping and thereby preserve the n-type characteristics . Moreover, the stronger binding ability of polymer chains containing oxygen atoms to the defects of SWCNTs than oxygen in the air also contributes to the high air stability . As a result, the composites have the longevity of n-type behavior.…”

Section: Resultsmentioning

confidence: 99%

“…19 Moreover, the stronger binding ability of polymer chains containing oxygen atoms to the defects of SWCNTs than oxygen in the air also contributes to the high air stability. 24 As a result, the composites have the longevity of n-type behavior.…”

Section: Resultsmentioning

confidence: 99%

“…11 However, as seen from Table S3, the output power density of the device in our work is comparable to or even higher than that of n-type SWCNT-based thermoelectric materials, which i s s u i t a b l e f o r p o w e r i n g w e a r a b l e e l e ctronics. 17,18,20,[22][23][24]33,37,38 3.4. Multifunctional Sensing Performance: Temperature and Strain.…”

Section: Output Performancementioning

confidence: 99%

“…Furthermore, the lone pair electrons of N and O in the polymer chains have reducibility on the SWCNT and thus can act as n-type dopants. In addition, the introduction of PEGDA chains can improve air stability. , As a result, composites with high n-type thermoelectric performance, good mechanical properties, and high air stability were achieved. The HDCN4/SWCNT composite achieves a power factor of 225.9 μW m –1 K –2 , a tensile strength of 33.2 MPa, and an elongation of 10%.…”

Section: Introductionmentioning

confidence: 99%

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Developing Air-Stable n-Type SWCNT-Based Composites with High Thermoelectric and Robust Mechanical Properties for Wearable Electronics

Xiao,

Zhang,

Long

et al. 2024

ACS Appl. Mater. Interfaces

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Flexible organic thermoelectric generators are gaining prominence in wearable electronics, leveraging body heat as an energy source. Their advancement is hindered by the scarcity of air-stable n-type organic materials with robust mechanical properties. This study introduces two new polymers (HDCN4 and HDCN8), created through polycondensation of paraformaldehyde and diamine-terminated poly(ethylene glycol) (PEGDA) with molecular weights of 4000 and 8000 g/mol into single-walled carbon nanotubes (SWCNTs). The resulting HDCN4/SWCNT and HDCN8/SWCNT composites show impressive power factors of 225.9 and 108.2 μW m −1 K −2 , respectively, and maintain over 90% in air for over four months without encapsulation. The HDCN4/SWCNT composite also demonstrates significant tensile strength (33.2 MPa) and flexibility (up to 10% strain), which is currently the best mechanically n-type thermoelectric material with such a high power factor reported in the literature. A thermoelectric device based on HDCN4/SWCNT generates 4.2 μW of power with a 50 K temperature difference. Additionally, when used in wearable temperature sensors, these devices exhibit high mechanical reliability and a temperature resolution of 0.1 K. This research presents a viable method to produce air-stable n-type thermoelectric materials with excellent performance and mechanical properties.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Output Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Developing Air-Stable n-Type SWCNT-Based Composites with High Thermoelectric and Robust Mechanical Properties for Wearable Electronics

Xiao,

Zhang,

Long

et al. 2024

ACS Appl. Mater. Interfaces

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Hydrogen-bonded n-type waterborne polyurethane/lysine/single-walled carbon nanotube ternary composite: Combining excellent thermoelectric and stretchable properties toward self-powered temperature and strain sensors

Cao,

He,

et al. 2023

Chemical Engineering Journal

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Enhanced Thermoelectric Properties of Stable n-Type Ferrocene Derivatives-Doped Polyethylenimine/Single-Walled Carbon Nanotube Composite Films

Xiong,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Preparing stable n-type flexible single-walled carbon nanotube (SWCNT)-based thermoelectric films with high thermoelectric (TE) performance is desirable for self-powering wearable electronics but remains a challenge. Here, the interface regulation and thermoelectric enhancement mechanism of ferrocene derivatives on polyethylenimine/single-walled carbon nanotube (PEI/ SWCNT) composite films have been explored by doping ferrocene derivatives (f-Fc−OH) into PEI/SWCNT films. The results show that the introduction of f-Fc−OH leads to the formation of "thorn" structures on the surfaces of SWCNT bundles via hydrophilic and hydrophobic interactions, the generated energy-filtering effect improves the thermoelectric properties of the PEI/ SWCNT film, and the f-Fc−OH-doped PEI/SWCNT (f-Fc−OH/PEI/ SWCNT) achieves the highest room-temperature power factor of 182.22 ± 8.60 μW m −1 K −2 with a Seebeck coefficient of −64.28 ± 0.96 μV K −1 and the corresponding ZT value of 4.69 × 10 −3 . The Seebeck coefficient retention ratio of the f-Fc−OH/PEI/SWCNT nearly remained 68% after being exposed to air for 3672 h, while the PEI/SWCNT film changed from n-type to p-type after being exposed to air for about 432 h. In addition, the temperature-dependent thermoelectric properties show that the f-Fc−OH/PEI/SWCNT achieves a high power factor of 334.57 μW m −1 K −2 at 353 K. Finally, a flexible TE module consisting of seven pairs of p−n junctions is assembled using the optimum composite film, which produces an open-circuit voltage of 42 mV and a maximum output power of 4.32 μW at a temperature gradient of 60 K. Therefore, this work provides guidance for preparing stable n-type SWCNT-based composite films with enhanced thermoelectric properties, which have potential applications in flexible generators and wearable electronic devices.

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Achieving air-stable n-type single-walled carbon nanotubes with high thermoelectric performance by doping with polyethylene glycol and N,N-dimethylferrocenemethylamine

Cited by 5 publications

References 54 publications

Developing Air-Stable n-Type SWCNT-Based Composites with High Thermoelectric and Robust Mechanical Properties for Wearable Electronics

Developing Air-Stable n-Type SWCNT-Based Composites with High Thermoelectric and Robust Mechanical Properties for Wearable Electronics

Hydrogen-bonded n-type waterborne polyurethane/lysine/single-walled carbon nanotube ternary composite: Combining excellent thermoelectric and stretchable properties toward self-powered temperature and strain sensors

Enhanced Thermoelectric Properties of Stable n-Type Ferrocene Derivatives-Doped Polyethylenimine/Single-Walled Carbon Nanotube Composite Films

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