High‐Performance Thermoelectric Paper Based on Double Carrier‐Filtering Processes at Nanowire Heterojunctions

Choi, Jinkyung; Lee, Jang Yeol; Lee, Sang Soo; Park, Chong Rae; Kim, Heesuk

doi:10.1002/aenm.201502181

Cited by 165 publications

(130 citation statements)

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“…15, it is logical to carry out a comparison of output performance based on power density normalized to temperature difference squared ΔT 2 , taking the diversity of the given temperature difference studied in different reports into consideration. The output performance (35 μWm −2 K −2 ) of our TEG with 16 mm repeat length (δ = 10.6) is superior to previously reported flexible organic TEGs 4,16,20,[30][31][32][38][39][40][41][42][43][44][45] and even some inorganic generators 46 , as shown in Fig. 6g (details of calculation is displayed in Supplementary Table 1).…”

Section: Resultsmentioning

confidence: 56%

Stretchable fabric generates electric power from woven thermoelectric fibers

et al. 2020

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Assembling thermoelectric modules into fabric to harvest energy from body heat could one day power multitudinous wearable electronics. However, the invalid 2D architecture of fabric limits the application in thermoelectrics. Here, we make the valid thermoelectric fabric woven out of thermoelectric fibers producing an unobtrusive working thermoelectric module. Alternately doped carbon nanotube fibers wrapped with acrylic fibers are woven into π-type thermoelectric modules. Utilizing elasticity originating from interlocked thermoelectric modules, stretchable 3D thermoelectric generators without substrate can be made to enable sufficient alignment with the heat flow direction. The textile generator shows a peak power density of 70 mWm −2 for a temperature difference of 44 K and excellent stretchability (~80% strain) with no output degradation. The compatibility between body movement and sustained power supply is further displayed. The generators described here are true textiles, proving active thermoelectrics can be woven into various fabric architectures for sensing, energy harvesting, or thermal management.

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Section: Resultsmentioning

confidence: 56%

Stretchable fabric generates electric power from woven thermoelectric fibers

et al. 2020

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“…So far, the successful choice of inclusions for high‐performance polymer‐based TE hybrid materials has been limited to Te, Bi 2 Te 3 , and carbon nanotube (CNT)/graphene . Among these hybrid materials, Te/polymer hybrids show promising ZT values (≈0.1–0.2); however, the problem is that high Te content (as high as 70–90 wt%) is needed to achieve high thermopower and PF value (i.e., >100 µW m −1 K −2 ) . Since the natural abundance of Te is as low as 1 µg kg −1 , the scarce Te source raises the high‐cost issue that impedes the industrial mass production of these high‐performance hybrids.…”

Section: Introductionmentioning

confidence: 99%

Individual Adjustment of Electrical Conductivity and Thermopower Enabled by Multiple Interfaces in Polyaniline‐Based Ternary Hybrid Nanomaterials for High Thermoelectric Performances

Wang

Sheng

et al. 2018

Adv Materials Inter

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adversely function as coolers, belong to an important category of advanced energy materials for sustainable energy utilization. [2] The performance of TE materials is generally assessed by the dimensionless figure of merit:where S, σ, T, and κ are the Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively. [3] The ideal TE materials are suggested to behave as "electronic crystal and phonon glass." [4] Compared to the traditional inorganic TE materials such as Bi 2 Te 3 or PbTe, which are still the most used commercial materials with the state-of-art ZT values, conducting polymer based TE materials are more like "phonon glass" with intrinsic low thermal conductivity. They emerge as a quite promising new type of TE materials due to their unique advantages, such as abundant sources, light weight, solution processibility for mass production, flexibility, mechanical robustness, and so on.One important merit for the conducting polymer as good candidate of TE material is the easy modulation of the energy levels which shall result in wide range change of S and σ, enabling huge room to improve the power factor (PF, defined as S 2 σ). Recent breakthrough in conducting polymer poly(3,4-ethylenedioxythiophene) through a control of the oxidation level and high-boiling-point solvents treatment reported a record high ZT value of 0.42 at room temperature. [5] Another parallelly developed strategy is to incorporate nanostructured inorganics with high electrical conductivity or high Seebeck coefficient in conducting polymer to form hybrid nanomaterials, where the presence of rich interfacial interfaces offer new opportunities to decouple the TE property parameters, showing great promise for high-performance TE conversion. So far, the successful choice of inclusions for high-performance polymer-based TE hybrid materials has been limited to Te, Bi 2 Te 3 , and carbon nanotube (CNT)/graphene. [6] Among these hybrid materials, Te/polymer hybrids show promising ZT values (≈0.1-0.2); however, the problem is that high Te content (as high as 70-90 wt%) is needed to achieve high thermopower and PF value (i.e., >100 µW m −1 K −2 ). [3,[7][8][9] Since the natural abundance of Te is as Recent developed conducting polymer based hybrid thermoelectric (TE) materials provide a promising alternative route for energy conversion on a large scale. However, high thermopower largely relies on high content of lowabundance elements, such as tellurium, which impedes the mass production of these materials. To optimize the compositions of the hybrids and further improve the TE properties, interfacial engineering is therefore employed to modulate the carrier transport properties in rationally designed multiwalled carbon nanotubes (MWCNTs)-Te nanorod/polyaniline (PANI) ternary hybrid nanomaterials considering the similar π-π conjugated interactions among these constituents. The effects of MWCNTs and Te nanorods, especially the multiple interfaces formed between the constituents, on the TE performances and ca...

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“…A similar doping effort was made for tuning its thermoelectric properties by Hayashi et al, where a good thermopower in the range of 40–60 µV K −1 and a good electrical conductivity of 60 S cm −1 were observed, which suggested the potential use of these materials . A flexible film of a ternary composite PEDOT:PSS/rGO/Te nanowire with a thickness of ≈20 mm was fabricated by Choi et al and achieved a power factor of 143 µW m −1 K −2 . In summary, the surge of interest in the last few years has produced a few notable advances as a result of careful manipulation of the doping levels, thereby achieving the value of zT of more than 0.4 in PEDOT:PSS‐based compounds …”

Section: Introduction To Thermoelectricsmentioning

confidence: 81%

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

Mulla

Rabinal

2019

Energy Tech

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The depletion of nonrenewable energy sources insisted the search for new types of energy solutions. Thermoelectric conversion is one possible energy solution which converts waste heat into useful electricity. In the past several years, thermoelectric research developed many novel materials. Among these, most of the practically useful materials with better performance are based on Bi, Pb, Te, and Sb, but are toxic and expensive. There is a need of earth‐abundant, low‐cost, and less‐toxic compounds with superior thermoelectric performance so as to realize the large‐scale commercial applications. Recent studies have identified eco‐friendly thermoelectric materials based on the alloys of copper and sulfur, suggesting an alternative to the well‐established expensive thermoelectric materials. These compounds exhibit interesting electronic properties with better thermoelectric efficiency (zT). The structural properties permit to decouple electrical and thermal conductivities, which is an essential requirement to get improved efficiency. Several approaches, such as phase tuning, doping, nanostructure/microstructure designing, compound formation, etc., are chosen to increase the performance. On the whole, the present review summarizes the strategies and techniques that have been adopted to improve the thermoelectric behavior of copper sulfides and its compounds.

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High‐Performance Thermoelectric Paper Based on Double Carrier‐Filtering Processes at Nanowire Heterojunctions

Cited by 165 publications

References 50 publications

Stretchable fabric generates electric power from woven thermoelectric fibers

Stretchable fabric generates electric power from woven thermoelectric fibers

Individual Adjustment of Electrical Conductivity and Thermopower Enabled by Multiple Interfaces in Polyaniline‐Based Ternary Hybrid Nanomaterials for High Thermoelectric Performances

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

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