Silica-modified few-layered MoS2 for SWCNT-based thermoelectric materials

Jiang, Duo; Li, Zan; Li, Yi; Wang, Chi; Wang, Yannan; Fu, Ping; Zhang, Yunfei; Du, Feipeng

doi:10.1016/j.cej.2024.149439

Cited by 6 publications

(1 citation statement)

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“…Nowadays, it is urgent to develop a mini and reliable micro-, nanowatt power supply to power the wearable device. − Thermoelectric devices made of p-type and n-type thermoelectric materials can realize conversion between thermal energy and electrical energy, which are one of the good candidates for powering wearable devices due to the advantages such as no moving part, easy maintenance, and eco-friendliness. − Generally, thermoelectric materials are evaluated by the dimensionless figure of merit ZT ( ZT = σ S 2 T /κ, where σ, S , T , and κ are electrical conductivity, Seebeck coefficient, absolute temperature, and thermal conductivity, respectively). For convenience, the power factor ( PF = S 2 σ), without considering thermal conductivity, has been used to evaluate thermoelectric performance. − Therefore, large PF and low κ materials are desirable for fabricating thermoelectric devices with good performance. − …”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermoelectric Properties of Exfoliated BN Nanosheets/Single-Walled Carbon Nanotube Composite Films for Applications in Flexible Electronics

Ma,

Wang,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Single-walled carbon nanotube (SWCNT)-based flexible thermoelectric films exhibit potential application in wearable electronics due to their good electrical conductivity (σ) and high flexibility. Nevertheless, the low Seebeck coefficient (S) greatly limits their thermoelectric application. The high S of inorganic boron nitride nanosheets is expected to make up for the low S of SWCNT. In this work, exfoliated boron nitride nanosheets (EBNS) are first prepared by solvothermal exfoliation of hexagonal boron nitride (h-BN), which are composited with SWCNT through a simple mixing and filtration method to prepare self-supporting EBNS/SWCNT films with improved thermoelectric properties. Here, the energy filtering effect at the EBNS/ SWCNT interface significantly improves the S values of the films. The results show that the maximum S of the EBNS/SWCNT at room temperature is 50.6 μV K −1 and the maximum power factor (PF) is 116.1 μW m −1 K −2 at the EBNS/SWCNT mass ratio of 7.5%. Finally, six pairs of p-type EBNS/SWCNT films and n-type copper sheets are connected in series to assemble a self-powered thermoelectric device, which demonstrates an open-circuit voltage of 8.1 mV and an output power of 550 nW under a temperature difference of 60 K. Therefore, this work provides a simple and effective method to improve the performance of carbon nanotubebased thermoelectric materials.

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