Flexible Thermoelectric Devices with Flexible Heatsinks of Phase-Change Materials and Stretchable Interconnectors of Semi-Liquid Metals

Huo, Wenxing; Xia, Zijie; Yu, Gao; Guo, Rui; Huang, Xian

doi:10.1021/acsami.3c05418

Cited by 23 publications

(12 citation statements)

References 48 publications

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“…Traditional metal-based heat exchangers are not suitable for this purpose. Instead, new types of heat exchangers with practical potential are being explored, such as those based on phase-change materials [227,228] or hydrogels [229,230]. Nonetheless, heat exchangers adapted for weavable thermoelectrics are still in the early stages of research, and their adaptability requires further optimization.…”

Section: Future Perspectivesmentioning

confidence: 99%

Weavable thermoelectrics: advances, controversies, and future developments

Shi,

Sun,

et al. 2024

Mater. Futures

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Owing to the capability of the conversion between thermal energy and electrical energy and their advantages of lightweight, compactness, noise-free operation, and precision reliability, wearable thermoelectrics show great potential for diverse applications. Among them, weavable thermoelectrics, a subclass with inherent flexibility, wearability, and operability, find utility in harnessing waste heat from irregular heat sources. Given the rapid advancements in this field, a timely review is essential to consolidate the progress and challenge. Here, we provide an overview of the state of weavable thermoelectric materials and devices in wearable smart textiles, encompassing mechanisms, materials, fabrications, device structures, and applications from recent advancements, challenges, and prospects. This review can serve as a valuable reference for researchers in the field of flexible wearable thermoelectric materials and devices and their applications.

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Section: Future Perspectivesmentioning

confidence: 99%

Weavable thermoelectrics: advances, controversies, and future developments

Shi,

Sun,

et al. 2024

Mater. Futures

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“…Hu et al integrated PCMs with TEGs of varying melting points to accomplish temperature regulation in diverse environments. 22 Leveraging the energy absorption and release properties of PCMs, it may be feasible to attain a superior energy efficiency in the TE sector.…”

Section: Introductionmentioning

confidence: 99%

“…Phase change materials (PCMs), capable of absorbing and releasing energy based on their phase change temperature, are extensively utilized in heat storage and temperature regulation applications. Hu et al integrated PCMs with TEGs of varying melting points to accomplish temperature regulation in diverse environments . Leveraging the energy absorption and release properties of PCMs, it may be feasible to attain a superior energy efficiency in the TE sector.…”

Section: Introductionmentioning

confidence: 99%

Phase-Transition-Promoted Thermoelectric Textiles Based on Twin Surface-Modified CNT Fibers

Yu,

Liu,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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With the fast development of new science and technology, wearable devices are in great demand in modern human daily life. However, the energy problem is a long-lasting issue to achieve real smart, wearable, and portable devices. Flexible thermoelectric generators (TEGs) based on thermoelectric conversion systems can convert body waste heat into electricity with excellent flexibility and wearability, which shows a new direction to solving this issue. Here in this work, polyethylenimine (PEI) and gold nanoparticles (Au NPs) twin surface-modified carbon nanotube fibers (CNTFs) were designed and prepared to fabricate thermalelectric textiles (TET) with high performance, good air stability, and highefficiency power generation. To better utilize the heat emitted by the human body, microencapsulated phase change materials (MPCM) were coated on the hot end of the TET to achieve the phase-transition-promoted TET. MPCM-coated TET device could generate 25.7% more energy than the untreated control device, which indicates the great potential of the phase-transition-promoted TET.

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“…Stress concentration during repeated bending can cause the rigid electrodes to fracture, making them unsuitable for wearable applications [ 28 , 29 ]. Liquid metals (LMs), such as eutectic indium gallium (EGaIn), which are in a liquid phase at room temperature, are infinitely deformable, exhibit good electrical and thermal conductivities, and have been studied for use as electrode materials [ 30 , 31 ]. For instance, Xu et al [ 32 ] fabricated an FTEG using Ni–EGaIn-based covered electrodes, which produced 26.2 mV when worn and maintained an excellent performance under 30% tension deformation.…”

Section: Introductionmentioning

confidence: 99%

A Novel PDMS-Based Flexible Thermoelectric Generator Fabricated by Ag2Se and PEDOT:PSS/Multi-Walled Carbon Nanotubes with High Output Performance Optimized by Embedded Eutectic Gallium–Indium Electrodes

Guo,

Shi,

Guo

et al. 2024

Nanomaterials

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Flexible thermoelectric generators (FTEGs), which can overcome the energy supply limitations of wearable devices, have received considerable attention. However, the use of toxic Te-based materials and fracture-prone electrodes constrains the application of FTEGs. In this study, a novel Ag2Se and Poly (3,4-ethylene dioxythiophene): poly (styrene sulfonate) (PEDOT:PSS)/multi-walled carbon nanotube (MWCNT) FTEG with a high output performance and good flexibility is developed. The thermoelectric columns formulated in the work are environmentally friendly and reliable. The key enabler of this work is the use of embedded EGaIn electrodes, which increase the temperature difference collected by the thermoelectric column, thereby improving the FTEG output performance. Additionally, the embedded EGaIn electrodes could be directly printed on polydimethylsiloxane (PDMS) molds without wax paper, which simplifies the preparation process of FTEGs and enhances the fabrication efficiency. The FTEG with embedded electrodes exhibits the highest output power density of 25.83 μW/cm2 and the highest output power of 10.95 μW at ΔT = 15 K. The latter is 31.6% higher than that of silver-based FTEGs and 2.5% higher than that of covered EGaIn-based FTEGs. Moreover, the prepared FTEG has an excellent flexibility (>1500 bends) and output power stability (>30 days). At high humidity and high temperature, the prepared FTEG maintains good performance. These results demonstrate that the prepared FTEGs can be used as a stable and environmentally friendly energy supply for wearable devices.

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Flexible Thermoelectric Devices with Flexible Heatsinks of Phase-Change Materials and Stretchable Interconnectors of Semi-Liquid Metals

Cited by 23 publications

References 48 publications

Weavable thermoelectrics: advances, controversies, and future developments

Weavable thermoelectrics: advances, controversies, and future developments

Phase-Transition-Promoted Thermoelectric Textiles Based on Twin Surface-Modified CNT Fibers

A Novel PDMS-Based Flexible Thermoelectric Generator Fabricated by Ag2Se and PEDOT:PSS/Multi-Walled Carbon Nanotubes with High Output Performance Optimized by Embedded Eutectic Gallium–Indium Electrodes

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