Flexible film-based thermoelectric generators
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MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.256
Flexible film-based thermoelectric generators Shuping Lin1, Wei Zeng1, Lisha Zhang1, Xiaoming Tao1* Research Center of Smart Wearable Technology, Institute of Textile and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, China PR
*
Corresponding author: [email protected]
ABSTRACT:
The present work highlights the progress in the field of flexible thermoelectric generator (fTEGs) fabricated by 3-D printing strategy on the typing paper substrate. In this study, printable thermoelectric paste was developed. The dimension of each planer thermoelectric element is 30mm*4mm with a thickness of 50 m for P-type Bismuth Tellurium (Bi2Te3)based/ poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) leg. A single thermoleg with this dimension can generate a voltage of 5.38 mV at a temperature difference of 70 K. The calculated Seebeck Coefficient of a single thermoleg is 76.86 V/K. This work demonstrates that low-cost printing technology is promising for the fabrication of f-TEGs.
INTRODUCTION: In recent years, a rapidly increasing research progress has been made in flexible TEGs because of its remarkable application potentials in energy harvesting, [1-4] microrobotics, and electronic textiles.[5-7] However, the fabrication of inorganic thermoelectric materials into thermoelectric modules involves high-temperature, longterm and high-cost processes. Moreover, it is a grand challenge to integrate these rigid inorganic materials into flexible TEG which requires unusual topology for an enhanced practical efficiency.[8, 9] Conducting polymers, such as Poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOT:PSS), have unique properties for TE application as their low thermal conductivity, solution processability for large-scale fabrication, low processing cost for manufacturing devices and application potential as flexible and lightweight devices. [10-12]Inorganic materials, such as Bismuth Telluride (Bi2Te3) is the best-known commercially used thermoelectric material for power generation
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applications owing to their high power factor at room temperature.[13, 14] Recently, flexible TE sheets and nonwoven fabrics based on poly-(styrenesulfonate)-doped poly(3,4-ethylenedioxythiophene), [15] doped carbon nanotube sheets, [16]and graphene composites[17-19] have been demonstrated in recent pioneering work. The Byung Jin Cho Group at the Korea Advanced Institute of Science and Technology has developed a glass fabric-based thermoelectric generator. But the TE elements in this structure are neither very flexible nor yarn based. [10] The progress of truly flexible composite-based flexible thermoelectric devices demonstrated that this principle could significantly enhance the device c
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