High thermoelectric performance in flexible TiS&lt;sub&gt;2&lt;/sub&gt;/organic superlattices

Yin, Shujia; Wan, Chunlei; Koumoto, Kunihito

doi:10.2109/jcersj2.21098

Cited by 4 publications

(2 citation statements)

References 39 publications

(48 reference statements)

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“…This value is lower than that obtained when the value of ΔT was fixed above RT ( Figure 8 C). Although the achieved power density of this single small module (area = 64 mm 2 ) was found to be 5.47 mW/m 2 at ΔT = −40 K, the obtained results can still be further enhanced by changing the polar organic molecules used in the superlattice formation, as reported recently by another research group [ 50 ].…”

Section: Resultsmentioning

confidence: 54%

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: Resultsmentioning

confidence: 54%

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

et al. 2023

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“…Organic intercalation of layered inorganic TE materials has been proven effective in co-optimizing the TE performance as well as flexibility. − When the organics are inserted into the interspace of adjacent inorganic layers, the expanded interspace would weaken the interlayer van der Waals force, make the inorganic/organic superlattice (SL) a “bulk two-dimensional (2D) material”, thereby endowing it with unique electrical transport characteristics as well as mechanical flexibility. For example, Wan et al constructed a TiS 2 /organics hybrid SL by electrochemically inserting organics into TiS 2 .…”

Section: Introductionmentioning

confidence: 99%

Construction of an MXene/Organic Superlattice for Flexible Thermoelectric Energy Conversion

Wang

Zhang

et al. 2022

ACS Appl. Energy Mater.

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Construction of an inorganic/organic superlattice-based film has been proven effective in enhancing thermoelectric (TE) performance as well as flexibility by a variety of mechanisms, typically for two-dimensional (2D) TiS2-based flexible TEs. MXenes, typically, Ti3C2T x , are a type of 2D material widely investigated in fields of flexible batteries and electromagnetic shielding, among others. However, they have rarely been reported in flexible TEs. One of the key factors is that the surface termination groups (−T) on an MXene could trap electrons, restricting the electronic transport. Herein, −T groups were tailored and substituted by organic ions (−HA) by facile preannealing, exfoliation, and reassembly. The intercalation of −HA introduced Ti–N bonding, forming a flexible MXene/organic superlattice film. The electrical conductivity of the superlattice film was increased by 5 times to 1.6 × 105 S m–1 due to defect reduction as well as the electron injection effect. While the Seebeck coefficient was maintained, the power factor was increased from 4 to 18 μW m–1 K–2. The TE module based on the superlattice film revealed an output power of 7.6 nW at a temperature gap of 50 K. This work opens up an avenue of fabricating flexible MXene-based TE films by tailoring the surface termination group and constructing inorganic/organic superlattice structures.

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Organic–Inorganic Nanohybrids as Thermoelectric Materials

Ayyaz

Altaf

Khan

et al. 2022

Materials Horizons: From Nature to Nanomaterials

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High thermoelectric performance in flexible TiS<sub>2</sub>/organic superlattices

Cited by 4 publications

References 39 publications

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

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

Construction of an MXene/Organic Superlattice for Flexible Thermoelectric Energy Conversion

Organic–Inorganic Nanohybrids as Thermoelectric Materials

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