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<p>Developing an economically efficient process to fabricate thermoelectric materials with remarkable figures of merit is essential for expanding its commercial application. Herein, a self-created extensional rheological technology is used to fabricate high-quality thermoelectric cooling materials. Pyrrole monomers are grown on the Ni<sub>0.49</sub>Cu<sub>0.59</sub>, and subsequently, uniformly dispersed within the polyethylene (PE) under an extensional flow field, establishing a continuous conductive network. The PE/polypyrrole@constantan (PE/Ppy@Ni<sub>0.49</sub>Cu<sub>0.59</sub>) composite exhibits an electrical conductivity of 1699.8 S cm<sup>−2</sup>, a thermal conductivity of 13.9 W m<sup>−1</sup> K<sup>−1</sup>, and a thermoelectric figure of merit (ZT) of 0.16 at 25 °C. Integrated with PE/Ppy@iron, the thermoelectric device exhibited a temperature reduction of 0.4 °C under a 30 V/0.3 A direct current excitation. To enhance performance, the application of square-wave pulsed currents effectively stabilized the thermoelectric cooling efficiency at its optimum level. Furthermore, the implementation of a custom-designed thermal insulation system significantly mitigated parasitic heat loss to the ambient environment. Collectively, these engineered enhancements achieved a total temperature reduction of 1.6 °C. This study provides an effective approach to fabricating thermoelectric materials, and it is promising to realize low-cost, large-scale commercialization of thermoelectric cooling.</p>

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Economical approach to thermoelectric cooling: development of conductive polyethylene/polypyrrole@constantan composite using extensional rheological technology

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Congyuan Zhang,
  • Changjun Guo,
  • Ansheng Ji,
  • Hongliang Zhou,
  • Weilong Zhou,
  • Wenzhuo Liu,
  • Ting Wu,
  • Jin-Ping Qu

摘要

Developing an economically efficient process to fabricate thermoelectric materials with remarkable figures of merit is essential for expanding its commercial application. Herein, a self-created extensional rheological technology is used to fabricate high-quality thermoelectric cooling materials. Pyrrole monomers are grown on the Ni0.49Cu0.59, and subsequently, uniformly dispersed within the polyethylene (PE) under an extensional flow field, establishing a continuous conductive network. The PE/polypyrrole@constantan (PE/Ppy@Ni0.49Cu0.59) composite exhibits an electrical conductivity of 1699.8 S cm−2, a thermal conductivity of 13.9 W m−1 K−1, and a thermoelectric figure of merit (ZT) of 0.16 at 25 °C. Integrated with PE/Ppy@iron, the thermoelectric device exhibited a temperature reduction of 0.4 °C under a 30 V/0.3 A direct current excitation. To enhance performance, the application of square-wave pulsed currents effectively stabilized the thermoelectric cooling efficiency at its optimum level. Furthermore, the implementation of a custom-designed thermal insulation system significantly mitigated parasitic heat loss to the ambient environment. Collectively, these engineered enhancements achieved a total temperature reduction of 1.6 °C. This study provides an effective approach to fabricating thermoelectric materials, and it is promising to realize low-cost, large-scale commercialization of thermoelectric cooling.