A flexible thermoelectric film based on Bi₂Te₃for wearable applications

Abstract

In recent years, with the development of the Internet of Things (IoT) and wearable technology, the research and exploration of thermoelectric materials have been greatly promoted. However, traditional thermoelectric materials are rigid and brittle. Thermoelectric devices made of these materials usually cannot be closely attached to the heat and cold sources that provide temperature differences, thus limiting the application of thermoelectric materials. Therefore, manufacturing new high-performance flexible thermoelectric devices is still a huge challenge. In this work, polyimide/copper (PI/Cu) substrate was deposited by electron deposition technology. The flexible thermoelectric thin film device was fabricated by bonding [Formula: see text]-type and [Formula: see text]-type bismuth telluride (Bi2Te[Formula: see text] slurries onto the PI/Cu substrate. Then, the PDMS film was coated on the device to make the device waterproof and oxidation resistant. The output voltage and maximum power of this device, at the temperature of 80 K, reach 97.5 mV and 60 uW, respectively. After 200 cycles of cyclic bending experiments, 90% high conductivity retention can be maintained. It demonstrates that the new flexible thermoelectric thin film has good flexibility and excellent stability. This work provides a simple method for the preparation of flexible thermoelectric thin films and opens up a new way for its application in the sensing equipment and wearable device of the IoT.

A novel material identification method for different thermal conductivities materials based on the micro thermoelectric generator

“…In the previous papers, our team have studied thermoelectric generator (TEG) and micro TEG (MTEG) in many fields, such as improving the performance of TEG and MTEG [15], producing excellent MTEG materials [16,17], making MTEG self-powered [18], and applying MTEG in practice [19]. Based on the previous papers and thermal tactile theory, this paper proposes a material identification theory and establishes the theoretical model.…”

Role of Pb Doping on the Thermoelectric Properties of Mg3Sb1.8‐yBi0.2Pby Alloys

“…[9][10][11][12][13][14][15] Nowadays, many tellurides have been developed as state-of-the-art thermoelectric materials, such as Bi 2 Te 3 , PbTe, SnTe and GeTe-AgSbTe 2 . [16][17][18][19][20][21] However, these materials contain the common toxic and scarce tellurium, which serves as the main constraint for their large-scale applications.…”

“…Ideal thermoelectric materials not only should possess high thermoelectric performance, but also meet the requirements of non‐toxic, good chemical stability, and thermal stability in practical applications [9–15] . Nowadays, many tellurides have been developed as state‐of‐the‐art thermoelectric materials, such as Bi 2 Te 3 , PbTe, SnTe and GeTe‐AgSbTe 2 [16–21] . However, these materials contain the common toxic and scarce tellurium, which serves as the main constraint for their large‐scale applications.…”

Performance comparison of thermal power generation‐organic Rankine cycle combined cycle system for ships waste heat utilization under different bottom cycle ratios

“…The TEG technology has great potential for recycling waste heat. [2][3][4][5] To recycle vehicle waste heat, Liu et al 6 proposed a new fluid thermoelectric multi-physical numerical model. At 120 km/h, the power output was 38.07 W and the thermal efficiency was 1.53%.…”

“…The TEG technology has great potential for recycling waste heat 2–5 . To recycle vehicle waste heat, Liu et al 6 proposed a new fluid thermoelectric multi‐physical numerical model.…”