High-performance flexible thermoelectric modules based on high crystal quality printed TiS<sub>2</sub>/hexylamine

Jacob, Stéphane; Delatouche, Bruno; Péré, Daniel; Khan, Zia Ullah; Ledoux, Marc J.; Crispin, Xavier; Chmielowski, Radoslaw

doi:10.1080/14686996.2021.1978802

Cited by 13 publications

(8 citation statements)

References 43 publications

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“…These layers/flakes of TOS seem not to be completely stacked with each other, at least in those which are close to the edges. Nevertheless, this structure and these layers are similar to those reported previously [ 40 , 41 , 42 , 43 , 44 , 45 ]. The film color is also like those reported in the literature, as shown in the photographed image presented in Figure 1 c, which shows a top view of the film formed on a 10 × 10 mm glass substrate.…”

Section: Resultssupporting

confidence: 91%

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

et al. 2023

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Recently, the n-type TiS2/organic hybrid superlattice (TOS) was found to have efficient thermoelectric (TE) properties above and near room temperature (RT). However, its TE performance and power generation at the temperature gradient below RT have not yet been reported. In this work, the TE performance and power generation of the TOS above and below RT were investigated. The electrical conductivity (σ) and Seebeck coefficient (S) were recorded as a function of temperature within the range 233–323 K. The generated power at temperature gradients above (at ΔT = 20 and 40 K) and below (at ΔT = −20 and −40 K) RT was measured. The recorded σ decreased by heating the TOS, while |S| increased. The resulting power factor recorded ~100 µW/mK2 at T = 233 K with a slight increase following heating. The charge carrier density and Hall mobility of the TOS showed opposite trends. The first factor significantly decreased after heating, while the second one increased. The TE-generated power of a single small module made of the TOS at ΔT = 20 and 40 K recorded 10 and 45 nW, respectively. Surprisingly, the generated power below RT is several times higher than that generated above RT. It reached 140 and 350 nW at ΔT = −20 and −40 K, respectively. These remarkable results indicate that TOS might be appropriate for generating TE power in cold environments below RT. Similar TE performances were recorded from both TOS films deposited on solid glass and flexible polymer, indicating TOS pertinence for flexible TE devices.

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Section: Resultssupporting

confidence: 91%

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

et al. 2023

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“…As shown in Figure 7a, the electrical conductivity σ was increased from 5.6 × 10 4 S m −1 of the MXene film to 8.2 × 10 4 S m −1 of the MX SL film. It is due to the electron injection effect: 50 when HA was inserted, it bonded with MXene; the N atoms in HA injected electrons to MXene and increased the carrier concentration (n) (Figure 7b and Table 1). The formation of the MXene/TiS 2 misfit structure can be considered as the substitution of some MXene nanosheets with TiS 2 nanosheets.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Robustly Enhanced Seebeck Coefficient in the MXene/Organics/TiS₂ Misfit Structure for Flexible Thermoelectrics

Wang

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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The flexible thermoelectric (TE) generator has emerged as a superior alternative to traditional batteries for powering wearable electronic devices, as it can efficiently convert skin heat into electricity without any safety concerns. MXene, a highly researched twodimensional material, is known for its exceptional flexibility, hydrophilicity, metallic conductivity, and processability, among other properties, making it a versatile material for a wide range of applications, including supercapacitors, electromagnetic shielding, and sensors. However, the low intrinsic Seebeck coefficient of MXene due to its metallic conducting nature poses a significant challenge to its TE application. Therefore, improving the Seebeck coefficient remains a primary concern. In this regard, a flexible MXene/organics/TiS 2 misfit film was synthesized in this work through organic intercalation, exfoliation, and re-assembly techniques. The absolute value of Seebeck coefficient of the misfit film was significantly enhanced to 44.8 μV K −1 , which is five times higher than that of the original MXene film. This enhancement is attributed primarily to the weighted effect of the Seebeck coefficient and possibly to energy-filtering effects at the heterogeneous interfaces. Additionally, the power factor of the misfit film was considerably improved to 77.2 μW m −1 K −2 , which is 18 times higher than that of the original MXene film. The maximum output power of the TE device constructed of the misfit film was 95 nW at a temperature difference of 40 K, resulting in a power density of 1.18 W m −2 , demonstrating the significant potential of this technology for driving low-energy consumption wearable electronics.

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“…In addition to the above high-performing chalcogenides, other chalcogenides are also gaining attention due to their high intrinsic ductility or high thermoelectric performance. 49,53,[191][192][193] Figure 6A shows photos of InSe single crystals and their highly ductile features. 47 As can be seen, the bulk InSe single crystal can be bent to a great extent without cracking.…”

Section: Chalcogenides and Their Hybridsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Given the rapid development in the field of flexible inorganic thermoelectrics, this article comprehensively overviews the advances with a focus on the optimization of their structures and performance. Here, we encompass an overview and synthesis of the preparation methods and practical application areas of inorganic flexible thermoelectric materials and their devices, including Bi 2 Te 3−x Se x , 41 Bi 2−x Sb x Te 3 , 42 Ag 2 X (X = S, Se, Te), [43][44][45] SnX (X = S, Se, Te), 46 InSe, 47 Cu 2 Se, 48 TiS 2 , 49 CoSb 3 , 50 oxides, 51,52 and complex chalcogenides, 53 as illustrated in Figure 1. Furthermore, this review also addresses the challenges currently faced in terms of performance optimization and fabrication processes of flexible inorganic thermoelectric materials.…”

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confidence: 99%

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Advances in flexible inorganic thermoelectrics

Shi,

Cao,

Chen

et al. 2023

EcoEnergy

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Solid‐state bismuth telluride‐based thermoelectric devices enable the generation of electricity from temperature differences and have been commercially applied in various fields. However, in many scenarios, the surface of the heat source is not flat. Therefore, it is crucial to develop flexible thermoelectric materials and devices to efficiently utilize heat sources and expand their applications. Compared with organic thermoelectric materials and devices, inorganic flexible thermoelectric materials and devices have much higher thermoelectric performance and stability. Considering the rapid development in this research field, we carefully summarize the design principles, structures, and thermoelectric properties of inorganic flexible materials and their devices reported in the recent 3 years, including sulfides, selenides, tellurides, and composite materials designed based on these inorganics. The structural designs of flexible thermoelectric devices based on micro‐sized bulk materials are also carefully summarized. Additionally, we overview the mechanical stability and methods for reducing internal resistance for designs of inorganic flexible thermoelectric devices. In the end, we provide outlooks on future research directions for inorganic flexible thermoelectric materials and devices. This review will help guide thermoelectric researchers, beginners, and students.

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High-performance flexible thermoelectric modules based on high crystal quality printed TiS₂/hexylamine

Cited by 13 publications

References 43 publications

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

Robustly Enhanced Seebeck Coefficient in the MXene/Organics/TiS₂ Misfit Structure for Flexible Thermoelectrics

Advances in flexible inorganic thermoelectrics

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High-performance flexible thermoelectric modules based on high crystal quality printed TiS2/hexylamine

Cited by 13 publications

References 43 publications

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

Thermoelectric Power Generation of TiS2/Organic Hybrid Superlattices Below Room Temperature

Robustly Enhanced Seebeck Coefficient in the MXene/Organics/TiS2 Misfit Structure for Flexible Thermoelectrics

Advances in flexible inorganic thermoelectrics

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High-performance flexible thermoelectric modules based on high crystal quality printed TiS₂/hexylamine

Robustly Enhanced Seebeck Coefficient in the MXene/Organics/TiS₂ Misfit Structure for Flexible Thermoelectrics