The power of pores: review on porous thermoelectric materials

Ijaz, Umar; Siyar, Muhammad; Park, Chan

doi:10.1039/d3su00451a

RSC Sustain.

2024

DOI: 10.1039/d3su00451a

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The power of pores: review on porous thermoelectric materials

Umar Ijaz,

Muhammad Siyar,

Chan Park

Abstract: Waste heat can be utilized to generate electric power via thermoelectric solid-state materials in a more reliable and quiet way than conventional heat power engines but with much lower efficiency....

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Cited by 7 publications

References 67 publications

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High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

Zhao,

Li,

Wang

et al. 2024

Advanced Materials

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The rapid development of the Internet of Things and wearable electronics has generated growing interest in creating high‐performance and visually striking polymer thermoelectric (TE) devices. However, existing polymer TE materials have yet to fully meet these diverse demands. In this study, imprinted porous polymer films are introduced that exhibit both high TE performance and a spectrum of structural colors. The porous architecture not only preserves excellent charge transport properties but also significantly enhances phonon‐like scattering, resulting in a more than 50% reduction in thermal conductivity for the PDPPSe‐12 film. This leads to a 170% increase in the figure of merit (ZT), achieving a peak value of 0.52 at 363 K. Furthermore, the highly ordered porous structure imparts the PDPPSe‐12 films with both a wide range of structural colors and remarkable stretchability, making them ideal for wearable TE generators. This approach is widely applicable to various polymeric systems, offering a novel strategy for advancing state‐of‐the‐art plastic TE materials through microstructural engineering.

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High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

Zhao,

Li,

Wang

et al. 2024

Advanced Materials

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Realizing Ultrahigh Conversion Efficiency of ≈9.0% in YbCd₂Sb₂/Mg₃Sb₂ Zintl Module for Thermoelectric Power Generation

Hu,

Sun,

Shi

et al. 2024

Advanced Materials

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Recently, YbCd2Sb2‐based Zintl compounds have been widely investigated owing to their extraordinary thermoelectric (TE) performance. However, its p orbitals of anions that determined the valence band structure are split due to crystal field splitting that provides a good platform for band manipulation by doping/alloying and, more importantly, the YbCd2Sb2‐based device has yet to be reported. In this work, single‐phase YbCd1.5Zn0.5Sb2 is successfully obtained through precise chemical composition control. Then, YbMg2Sb2‐alloying increases the cationic vacancy defect formation energy and further optimizes carrier concentration. Moreover, the band structure of YbCd1.5Zn0.5Sb2 is subtly manipulated, and the underlying mechanism is experimentally explored. Combined with the reduced lattice thermal conductivity, a high peak ZT value of ∼1.43 at 700 K is obtained for YbCd1.425Zn0.475Mg0.1Sb2. Subsequently, choosing Fe90Sb10 as the diffusion barrier layer and adopting the transient liquid phase bonding technique, for the first time, it is demonstrated that YbCd2Sb2/Mg3(Sb, Bi)2 TE module with an ultrahigh conversion efficiency of ≈9.0% at a heat difference of 430 K. More importantly, this module displays good thermal stability. This work paves the way for YbCd2Sb2 materials and devices in mid‐temperature heat recovery.

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Porous Thermoelectric Materials for Energy Conversion by Thermoelectrocatalysis

Wu,

Chen,

Reece

et al. 2024

Energy Tech

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Novel uses of thermoelectric (TE) materials as catalyst and catalyst promoters have been reported recently for a variety of applications such as environmental gas mitigation, battery, and photoreduction of nuclear wastewater. TE Seebeck voltage is found to increase the catalytic activities by tens to hundreds of times, and this effect is termed thermoelectrocatalysis. In these uses, the TE materials are in an open‐circuit configuration, which is different from the usual closed‐circuit configuration in the TE energy generation and cooling devices. A new figure of merit defined as the Seebeck voltage per unit heat loss is proposed for the application of thermoelectrocatalysis. Techniques such as dense bulk porous surface and increased thickness of the TE materials are used for the optimization of the thermoelectrocatalysis of the oxyselenide BiCuSeO for the carbon dioxide hydrogenation reactions.

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The power of pores: review on porous thermoelectric materials

Abstract: Waste heat can be utilized to generate electric power via thermoelectric solid-state materials in a more reliable and quiet way than conventional heat power engines but with much lower efficiency....

Cited by 7 publications

References 67 publications

High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

Realizing Ultrahigh Conversion Efficiency of ≈9.0% in YbCd₂Sb₂/Mg₃Sb₂ Zintl Module for Thermoelectric Power Generation

Porous Thermoelectric Materials for Energy Conversion by Thermoelectrocatalysis

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The power of pores: review on porous thermoelectric materials

Abstract: Waste heat can be utilized to generate electric power via thermoelectric solid-state materials in a more reliable and quiet way than conventional heat power engines but with much lower efficiency....

Cited by 7 publications

References 67 publications

High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

High Performance and Colorful Polymer Thermoelectrics with Imprinted Porous Film

Realizing Ultrahigh Conversion Efficiency of ≈9.0% in YbCd2Sb2/Mg3Sb2 Zintl Module for Thermoelectric Power Generation

Porous Thermoelectric Materials for Energy Conversion by Thermoelectrocatalysis

Contact Info

Product

Resources

About

Realizing Ultrahigh Conversion Efficiency of ≈9.0% in YbCd₂Sb₂/Mg₃Sb₂ Zintl Module for Thermoelectric Power Generation