Porous organic filler for high efficiency of flexible thermoelectric generator

Jung, Sung Jin; Shin, Jong‐Shik; Lim, Sang Soon; Kwon, Beomjin; Baek, Seung Hyub; Kim, Seong Keun; Park, Hyung Ho; Kim, Jin Sang

doi:10.1016/j.nanoen.2020.105604

Cited by 63 publications

(26 citation statements)

References 29 publications

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“…For example, a recently reported flexible thermoelectric generator uses structural support of porous PDMS as a flexible filler to maintain the difference in temperatures. 58 However, the used porous PDMS was not transparent. Thus, the presented porous PDMS with enhanced thermal insulation in this study can be used as the filler in the vertically-aligned thermoelectric generator, 59 requiring transparency and flexibility.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of fine-pored polydimethylsiloxane using an isopropyl alcohol and water mixture for adjustable mechanical, optical, and thermal properties

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Fabrication of fine-pored polydimethylsiloxane using an isopropyl alcohol and water mixture for adjustable mechanical, optical, and thermal properties

et al. 2021

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“…Alternatively, heat conduction can be suppressed by the introduction of a porous polymer (PDMS) filler as investigated by Jung and colleagues (see also Figure 7c). 131 As compared to dense PDMS, porous PDMS results in a 40% reduction in thermal conductivity. The lowered thermal conductivity allowed an increase in the temperature difference across the Bi 2 Te 3 TE module.…”

Section: Modification Of Viscoelastic Properties Through Additivesmentioning

confidence: 99%

“…Traditionally, TE foams are fabricated by the infiltration of organic TE materials such as PEDOT:PSS and CNT on commercial melamine foams or PVDF templates as shown in Figure a,b. − These foam-based TE sensors give rise to a thermally disconnected but electrically connected porous network system. Alternatively, heat conduction can be suppressed by the introduction of a porous polymer (PDMS) filler as investigated by Jung and colleagues (see also Figure c) . As compared to dense PDMS, porous PDMS results in a 40% reduction in thermal conductivity.…”

Section: Strategies For Direct Ink Writing Of Thermoelectric Materialsmentioning

confidence: 99%

Additive Manufacturing of Thermoelectrics: Emerging Trends and Outlook

et al. 2022

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Additive manufacturing (AM) has progressed rapidly in recent years, thanks to its versatility in printing complex and intricate shapes. Very recently, it has also been making inroads into functional and energy materials. On the other hand, thermoelectrics is a relatively mature field, with well-established understanding and design, especially on the materials level. However, complexities in device fabrication and scalability issues have greatly hindered thermoelectric (TE) applications. In this Focus Review, we discuss the advent of AM as a timely and important tool not only to overcome the scalability issues but also to achieve shape intricacies and conformability for flexible and wearable applications. In particular, direct ink writing (DIW), a subset under materials extrusion methods, holds great promise as a versatile fabrication technique for integrated TE devices. More importantly, we discuss the great promise of “engineered nanostructuring” using DIW as a new paradigm to improve TE performance beyond intrinsic properties.

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“…Lv et al [ 3 ] integrated a copper-foam heat sink with the LM-based elastomer to reduce the thermal resistance at the cold side of WTEG, which could achieve a superhigh output power density of 15.8 μW/cm 2 at free-moving conditions and 97.6 μW/cm 2 for walking of 0.8 m/s. Jung et al [ 26 ] have adopted a polymeric hydrogel heat sink for thermal absorption and achieved high performance of 9.7 μW/cm 2 . Lee et al [ 27 ] also used a hydrogel-based heat sink to the LM-based flexible WTEG and obtain an output power density of 8.32 μW/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

A Liquid Metal-Enhanced Wearable Thermoelectric Generator

Liu¹,

Li²,

Yang³

et al. 2022

Bioengineering

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It is a key challenge to continuously power personal wearable health monitoring systems. This paper reports a novel liquid metal-enhanced wearable thermoelectric generator (LM-WTEG that directly converts body heat into electricity for powering the wearable sensor system. The gallium-based liquid metal alloys with room-temperature melting point (24~30 °C) and high latent heat density (about 500 MJ/m3) are used to design a new flexible finned heat sink, which not only absorbs the heat through the solid-liquid phase change of the LM and enhances the heat release to the ambient air due to its high thermal conduction. The LM finned is integrated with WTEG to present high biaxial flexibility, which could be tightly in contact with the skin. The LM-WTEG could achieve a super high output power density of 275 μW/cm2 for the simulated heat source (37 °C) with the natural convective heat transfer condition. The energy management unit, the multi-parameter sensors (including temperature, humidity, and accelerometer), and Bluetooth module with a total energy consumption of about 65 μW are designed, which are fully powered from LM-WTEG through harvesting body heat.

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Porous organic filler for high efficiency of flexible thermoelectric generator

Cited by 63 publications

References 29 publications

Fabrication of fine-pored polydimethylsiloxane using an isopropyl alcohol and water mixture for adjustable mechanical, optical, and thermal properties

Fabrication of fine-pored polydimethylsiloxane using an isopropyl alcohol and water mixture for adjustable mechanical, optical, and thermal properties

Additive Manufacturing of Thermoelectrics: Emerging Trends and Outlook

A Liquid Metal-Enhanced Wearable Thermoelectric Generator

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