Full-Electrochemical Construction of High-Performance Polypyrrole/Tellurium Thermoelectrical Nanocomposites

Li, Yang; Gao, Caiyan; Fan, Xin‐Heng; Yang, Lian‐Ming

doi:10.1021/acsami.1c22731

Cited by 12 publications

(15 citation statements)

References 45 publications

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“…Like the Te/PEDOT:PSS NC system as mentioned previously, the higher energy carriers hop across the interfacial potential barrier and the relatively low energy carriers are selectively scattered by the interfacial barrier, which result in an enhanced S and a higher thermoelectric PF. Li et al 208 developed a full-electrochemical method to prepare Te/PPy NC multilayer films. As illustrated in Fig.…”

Section: Te/polymers For Thermoelectricsmentioning

confidence: 99%

Tellurium/polymers for flexible thermoelectrics: status and challenges

et al. 2023

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Section: Te/polymers For Thermoelectricsmentioning

confidence: 99%

Tellurium/polymers for flexible thermoelectrics: status and challenges

et al. 2023

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“…[ 18 ] reported the first Te‐incorporated PPy composite utilizing the oxidative polymerization of pyrrole (Py) in the presence of a small amount of Te powder, and the PF reached as much as 23.89 µW m −1 K −2 at 373 K, which, in spite of a fairly moderate value, is about 859 times higher than that of the pure PPy. Very recently, our group further optimized the TE performance of the PPy‐based composites through an innovative electrochemical method, achieving the best PFs of 234.3 ± 4.1 µW m −1 K −2 for the PPy/Te composites [ 19 ] and 365.2 ± 9.6 µW m −1 K −2 for the PPy/SWCNT composites, [ 20 ] which are much higher than those of the corresponding composites reported previously.…”

Section: Introductionmentioning

confidence: 99%

“…Organic/inorganic nanocomposites with unique nanostructure are emerging as a preferential choice for flexible TE applications since they not only inherit the advantageous features from each component, that is, the high electrical conductivity (σ) and the large Seebeck coefficient (S) of inorganic ingredients, as well as the low thermal conductivity (κ) of organic counterparts, but also are endowed with novel interfacial chemistry, which of a fairly moderate value, is about 859 times higher than that of the pure PPy. Very recently, our group further optimized the TE performance of the PPy-based composites through an innovative electrochemical method, achieving the best PFs of 234.3 ± 4.1 µW m −1 K −2 for the PPy/Te composites [19] and 365.2 ± 9.6 µW m −1 K −2 for the PPy/SWCNT composites, [20] which are much higher than those of the corresponding composites reported previously.…”

Section: Introductionmentioning

confidence: 99%

“…[13] Nonetheless, with the development of organic/inorganic TE nanocomposites, the PPy has reawakened great interest of research in the TE application in the light of its low cost, high environmental stability, and good biocompatibility. [14][15][16] Currently, some milestone progresses for the PPy-based TE binary nanocomposites have been made, [17][18][19][20] profiting from the incorporation of the inorganic nanoparticles with high σ and/or large S, such as single-walled carbon nanotubes (SWCNTs) [21] and tellurium (Te), [22] the former of which possess ultra-high σ as well as good flexibility and large specific surface areas while the latter is a low-bandgap inorganic semiconductor with high S value of ≈400 µV K −1 at room temperature. For instance, by physically mixing the electrodeposited PPy with highly conductive SWCNTs, Fan et al [17] obtained a significantly improved PF of as high as 240.3 ± 5.0 µW m −1 K −2 for the PPy/SWCNT composites in 2019, which is the highest value for the PPy-based binary composites at that time.…”

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confidence: 99%

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Pulse Electrochemically Driven Multilayer Assembly of Single‐Walled Carbon Nanotube/Polypyrrole/Tellurium Composite Films for Ultra‐High‐Performance Flexible Thermoelectric Applications

Yang

Gao

Fan

et al. 2023

Adv Materials Technologies

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can significantly raise the S by the energyfiltering effect and effectively decrease the κ via the phonon scattering at the nanoscale interfaces. [1,2] Particularly, the nanocomposites, based on the classical conducting polymers (CPs) such as poly(3,4-ethylenedioxythiophene) (PEDOT), polyaniline (PANI), and polythiophene (PTh), have received intensive investigation in TE applications because of their simple synthetic procedures, and witnessed amazing progress during the last decade. [3][4][5][6][7][8][9][10] By contrast, much less attention has been paid to their analogue polypyrrole (PPy)-based nanocomposites. This is probably ascribed to an empirical consensus that the PPy seems to be unpromising in TE applications due to its fairly poor TE performance determined by low σ and small S when compared to the other conducting polymers. [11][12][13] To date, the best PF and the maximum ZT for the pure PPy were recorded by our group to be only 5.23 µW m −1 K −2 and 14.2 × 10 −3 through a two-step electrochemical modification. [13] Nonetheless, with the development of organic/inorganic TE nanocomposites, the PPy has reawakened great interest of research in the TE application in the light of its low cost, high environmental stability, and good biocompatibility. [14][15][16] Currently, some milestone progresses for the PPy-based TE binary nanocomposites have been made, [17][18][19][20] profiting from the incorporation of the inorganic nanoparticles with high σ and/or large S, such as single-walled carbon nanotubes (SWCNTs) [21] and tellurium (Te), [22] the former of which possess ultra-high σ as well as good flexibility and large specific surface areas while the latter is a low-bandgap inorganic semiconductor with high S value of ≈400 µV K −1 at room temperature. For instance, by physically mixing the electrodeposited PPy with highly conductive SWCNTs, Fan et al. [17] obtained a significantly improved PF of as high as 240.3 ± 5.0 µW m −1 K −2 for the PPy/SWCNT composites in 2019, which is the highest value for the PPy-based binary composites at that time. In 2021, Debnath et al. [18] reported the first Te-incorporated PPy composite utilizing the oxidative polymerization of pyrrole (Py) in the presence of a small amount of Te powder, and the PF reached as much as 23.89 µW m −1 K −2 at 373 K, which, in spite Although several efforts were made to develop high-performance thermoelectric (TE) composites by a combination of single-walled carbon nanotubes (SWCNTs) with a high conductivity and tellurium (Te) with a large Seebeck coefficient, only a very limited advance has been achieved because of their intrinsic interfacial incompatibility. In this work, a range of SWCNT/polypyrrole (PPy)/Te flexible composite films are prepared through sequentially pulse electrodepositing PPy and Te over the prefabricated SWCNT membrane electrode, where both the introduction of the PPy sandwich layer and the adoption of two pulse electrodepositions play a vital role in ameliorating the TE performance of the composites via the synergic optimiza...

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“…Summary of research on some interfacial engineering strategies for organic-inorganic composites[119][120][121][122][123][124][125][126][127][128][129][130][131][132] Composite s (S cm À1 ) S (mV K À1 ) PF (mW m À1 K À2 ) AE 4.1 187.5 AE 7.4 234.3 AE 4.1 PPy/SWCNTs 341.6 AE 4.7 33.2 AE 0.7 37.6 AE 2.3 AE 1.3 23.23 AE 4.76…”

mentioning

confidence: 99%