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This chapter contributes to energy harvesting techniques, which are particularly interesting for ensuring the autonomy of various millimeter-scale and microscopic devices using current generators. It provides a concise description of pyroelectric materials, which constitute a subgroup of piezoelectricPiezoelectric solids. It explores the origin of pyroelectric and piezoelectricPiezoelectric conversions through a Maxwellian approach, thus offering a detailed explanation of how these two phenomena manifest in a ferroelectric crystal. Additionally, it delves deeply into the merit factors associated with these two effects. Subsequently, the chapter focuses on optimizing the power recovered by a purely resistive load, utilizing the equivalent electrical schematic of a material possessing both pyroelectric and piezoelectricPiezoelectric properties. This allows us to model the thermomechanical losses associated with binding the electrical response to the physical characteristics of the material and the applied excitation. A numerical simulation was developed for PZT and LiTaO3 to support the theoretical analysis. Finally, the obtained results are applied to identify a material capable of harvesting the maximum amount of energy.

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Enhancing Energy Harvesting Efficiency in Autonomous Devices Using Dual Pyro-Piezoelectric Materials

  • 章节

  • 发表日期：

    2025年

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  • Mohammed Remaidi,
  • Meryiem Derraz,
  • Hassan Radoine,
  • Mohamed Aymen Ben Achour,
  • Chouaib Ennawaoui,
  • Abdelowahed Hajjaji

摘要

This chapter contributes to energy harvesting techniques, which are particularly interesting for ensuring the autonomy of various millimeter-scale and microscopic devices using current generators. It provides a concise description of pyroelectric materials, which constitute a subgroup of piezoelectricPiezoelectric solids. It explores the origin of pyroelectric and piezoelectricPiezoelectric conversions through a Maxwellian approach, thus offering a detailed explanation of how these two phenomena manifest in a ferroelectric crystal. Additionally, it delves deeply into the merit factors associated with these two effects. Subsequently, the chapter focuses on optimizing the power recovered by a purely resistive load, utilizing the equivalent electrical schematic of a material possessing both pyroelectric and piezoelectricPiezoelectric properties. This allows us to model the thermomechanical losses associated with binding the electrical response to the physical characteristics of the material and the applied excitation. A numerical simulation was developed for PZT and LiTaO3 to support the theoretical analysis. Finally, the obtained results are applied to identify a material capable of harvesting the maximum amount of energy.