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Examining the Mechanism of Current Conduction at Varying Temperatures in Polyimide Nanocomposite Films

Author

Listed:
  • Shakeel Akram

    (College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China
    College of Electrical Engineering, Sichuan University, Chengdu 610065, China)

  • Inzamam Ul Haq

    (College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China)

  • Jerome Castellon

    (Institut d’Electronique et des Systèmes, University of Montpellier, 34090 Montpellier, France)

  • M. Tariq Nazir

    (School of Engineering, RMIT University, Melbourne, VIC 3000, Australia)

Abstract

Charge injection and conduction are fundamental phenomena that occur in dielectric materials when subjected to both low and high electric fields. This paper delves into the exploration of various conduction mechanisms, including space-charge-limited current (SCLC), Schottky charge injection, Poole–Frenkel, and hopping charge conduction, to elucidate the prevailing conduction mechanism in single and multilayer polyimide (PI)/SiO 2 nanocomposite films across a range of temperatures. At elevated electric field strengths, the conduction behavior transitions from ohmic to exhibiting a non-linear current–voltage dependence. The investigation highlights that PI nanocomposite films display distinct conduction behaviors contingent on both the applied electric field and temperature conditions. The insights derived from this study provide valuable empirical groundwork and explanations for conducting current measurements in PI-based insulation systems, particularly in applications such as motor insulation for electric vehicles.

Suggested Citation

  • Shakeel Akram & Inzamam Ul Haq & Jerome Castellon & M. Tariq Nazir, 2023. "Examining the Mechanism of Current Conduction at Varying Temperatures in Polyimide Nanocomposite Films," Energies, MDPI, vol. 16(23), pages 1-19, November.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:23:p:7796-:d:1288459
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