3D printed piezoelectric porous structure with enhanced output performance and stress-electricity response for road energy harvesting

Song, Shuai; Han, Ying; Li, Yijun; Wang, Qi

doi:10.1016/j.addma.2023.103625

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…The construction of microscopic structural elements such as micropillar, microarray, or micropatterned structures has been well reported via templates or the photolithography technique, but these methods cannot be applied to are more difficult to architect three-dimensional structures in the normal direction. In fact, additive manufacturing is the most convenient method to introduce various types of macroscopic structural elements into the bulk PVDF parts with easily controlled pore size. , There are also bottlenecks in conventional printing methods because the precision of the nozzle printing cannot ensure structural elements small enough for high-density voxels, as proven by the presence of millimeter-sized pores . Recently, a supercritical carbon dioxide (SCCO 2 ) foaming technique has been successfully applied in fabricating piezoelectric PVDF foams with a cell density of over ∼200 cells/mm 2 , which is far more than the structural elements below ∼10 cells/mm 2 obtained by traditional additive manufacturing methods. , Note that, although the cell densities are enhanced, it is still difficult to control the pore size and distributions because the dissolve concentration of foaming additives, i.e., liquid SCCO 2 here, is limited by the content of the amorphous phase in the polymers, leaving the structure–performance relationship unperfected.…”

Section: Introductionmentioning

confidence: 99%

Boosting Piezoelectricity via a Bimodal Pore Distribution: The Role of Small Pores

Jiang,

Guo,

Nie

et al. 2023

ACS Appl. Electron. Mater.

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Structural elements play an important role for improving mechanical-to-electrical energy conversion of piezoelectric devices with a hierarchical configuration. However, the state-of-the-art manufacturing method fails to ensure plenty of structural elements for better piezoelectricity. In this work, piezoelectric poly(vinylidene fluoride) (PVDF) foam with an extremely high content of structural elements was fabricated by applying bimodal pore distributions via supercritical carbon dioxide foaming and template-leaching methods, and the mechanisms for improved piezoelectricity were systematically researched. By removal of the preadded templates, the structural element density can be modulated from ∼187 to ∼2.6 × 106 cells/mm2. It was found that the small pores in a foam with bimodal pore distributions can diminish small or medium stress and convert it to high stress in the rest area of the large pores, thus greatly enlarging the ratio of stress concentration. Impressively, the stress concentration degree is improved from 0.19 of bulk PVDF to 5.3 and 13.3 of PVDF foam with unimodal and bimodal pore distributions, respectively. As a result, the piezoelectric outputs increase correspondingly from ∼5 V to ∼8.5 and ∼13 V. This work reveals the strain–charge correlations by applying structural elements and can be extended widely for studies on a three-dimensional piezoelectric device.

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Section: Introductionmentioning

confidence: 99%

Boosting Piezoelectricity via a Bimodal Pore Distribution: The Role of Small Pores

Jiang,

Guo,

Nie

et al. 2023

ACS Appl. Electron. Mater.

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Study on the control of mechanical and electrical properties of 3d printed BTO/PDMS flexible porous composites

Hao,

Wang,

Wang

et al. 2024

J Polym Res

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High-Performance Lightweight and Flexible PVDF-B/MXene/Chitosan Composite Aerogel for Sensitive Self-Powered Sensing

Liu,

Zhang,

Yang

et al. 2024

ACS Appl. Polym. Mater.

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Piezoelectric devices are becoming increasingly attractive in areas such as wearable electronics, mobile environmental sensors, and health monitoring due to their unique capability to harvest discrete mechanical energy. Nevertheless, most piezoelectric materials are fabricated into low-dimensional products, which limits the performance breakthroughs and application prospects of these devices. Here, a series of polyvinylidenefluoride (PVDF) doped with dopamine hydrochloride@BaTiO 3 /MXene/chitosan (PVDF-B/MXene/CS) composite aerogel piezoelectric devices with outstanding output performance were fabricated by combining electrospinning and freeze-drying techniques. Among them, the PVDF-B/MXene/CS composite aerogel-based piezoelectric devices with electrodes exhibited rather better output performance compared to those without electrodes, while the electrodeless piezoelectric devices demonstrated excellent piezoelectric response under various stress modes. The electrodeless piezoelectric devices maintained a stable voltage over 1800 cycles and achieved the maximum power output of 4.25 nW with an external resistance of 100 MΩ. Furthermore, the electrodeless piezoelectric device was capable of charging capacitors with varying capacities and could easily illuminate a small light emitting diode (LED) light by manual tapping. These piezoelectric devices showed tangible and stable signals regarding mechanical stimuli monitoring, such as wrist bending, finger tapping, and pedal movements. This work not only expands the range of aerogel-based piezoelectric materials but also showcases their immense potential in the field of piezoelectric devices.

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3D printed piezoelectric porous structure with enhanced output performance and stress-electricity response for road energy harvesting

Cited by 5 publications

References 48 publications

Boosting Piezoelectricity via a Bimodal Pore Distribution: The Role of Small Pores

Boosting Piezoelectricity via a Bimodal Pore Distribution: The Role of Small Pores

Study on the control of mechanical and electrical properties of 3d printed BTO/PDMS flexible porous composites

High-Performance Lightweight and Flexible PVDF-B/MXene/Chitosan Composite Aerogel for Sensitive Self-Powered Sensing

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