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Low-k nano-dielectrics facilitate electric-field induced phase transition in high-k ferroelectric polymers for sustainable electrocaloric refrigeration

Author

Listed:
  • Qiang Li

    (Shanghai Jiao Tong University)

  • Luqi Wei

    (East China Normal University)

  • Ni Zhong

    (East China Normal University)

  • Xiaoming Shi

    (Beijing Institute of Technology)

  • Donglin Han

    (Shanghai Jiao Tong University)

  • Shanyu Zheng

    (Shanghai Jiao Tong University)

  • Feihong Du

    (Shanghai Jiao Tong University)

  • Junye Shi

    (Shanghai Jiao Tong University)

  • Jiangping Chen

    (Shanghai Jiao Tong University)

  • Houbing Huang

    (Beijing Institute of Technology)

  • Chungang Duan

    (East China Normal University)

  • Xiaoshi Qian

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University ZhongGuanCun Research Institute)

Abstract

Ferroelectric polymer-based electrocaloric effect may lead to sustainable heat pumps and refrigeration owing to the large electrocaloric-induced entropy changes, flexible, lightweight and zero-global warming potential. Herein, low-k nanodiamonds are served as extrinsic dielectric fillers to fabricate polymeric nanocomposites for electrocaloric refrigeration. As low-k nanofillers are naturally polar-inactive, hence they have been widely applied for consolidate electrical stability in dielectrics. Interestingly, we observe that the nanodiamonds markedly enhances the electrocaloric effect in relaxor ferroelectrics. Compared with their high-k counterparts that have been extensively studied in the field of electrocaloric nanocomposites, the nanodiamonds introduces the highest volumetric electrocaloric enhancement (~23%/vol%). The resulting polymeric nanocomposite exhibits concurrently improved electrocaloric effect (160%), thermal conductivity (175%) and electrical stability (125%), which allow a fluid-solid coupling-based electrocaloric refrigerator to exhibit an improved coefficient of performance from 0.8 to 5.3 (660%) while maintaining high cooling power (over 240 W) at a temperature span of 10 K.

Suggested Citation

  • Qiang Li & Luqi Wei & Ni Zhong & Xiaoming Shi & Donglin Han & Shanyu Zheng & Feihong Du & Junye Shi & Jiangping Chen & Houbing Huang & Chungang Duan & Xiaoshi Qian, 2024. "Low-k nano-dielectrics facilitate electric-field induced phase transition in high-k ferroelectric polymers for sustainable electrocaloric refrigeration," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-44926-8
    DOI: 10.1038/s41467-024-44926-8
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    References listed on IDEAS

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