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Design and preparation of a micro-harvesting device made of hybrid SMA/Piezoelectric polymer composite

Abstract : Small-scale energy harvesting to power self-powered electronic devices is tremendously increasing. In this regard, the ability to combine thermal and mechanical harvesting using smart materials pays more attention. We have presented the feasibility of using P(VDF-TrFE) piezoelectric polymer coupled with NiTi shape memory alloy (SMA) to harvest both mechanical and thermal energy in simple scalable devices. A novel multi-layered SMA-P(VDF-TrFE) composite was fabricated and carried out their electro-thermo-mechanical performance. We have designed and developed an experimental bench to perform the electro-thermomechanical characterization of the composite, allowing us to measure the piezoelectric response when it is subjected to periodic heating and cooling. Furthermore, we performed the finite element analysis of the SMA-Piezoelectric composite and simulated the main properties of SMA such as superelastic behavior, one-way shape memory effect, and two-way shape memory effect, to finally identify the overall effective electro-thermomechanical behavior of the SMA-piezoelectric polymer composite. Finally, in order to efficiently harvest the electric charge generated from the P(VDF-TrFE) film, we have studied and compared two types of integrated converters and determined the conditions for effective energy harvesting. These results are promising, which showing the feasibility of this multilayered composite to power small electronics such as wireless sensors, MEMS and biomedical devices in an autonomous way.
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Submitted on : Friday, November 5, 2021 - 3:41:33 PM
Last modification on : Saturday, November 6, 2021 - 4:22:07 AM

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  • HAL Id : tel-03417207, version 1

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Sunija Sukumaran. Design and preparation of a micro-harvesting device made of hybrid SMA/Piezoelectric polymer composite. Mechanics of materials [physics.class-ph]. Université de Lorraine, 2021. English. ⟨NNT : 2021LORR0140⟩. ⟨tel-03417207⟩

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