Energy conversion model and extrusion 3D printing of piezoelectric composite energy harvesters

Shi, Xiaoquan and Sun, Yazhou and Li, Dekai and Liu, Haitao and Xie, Wenkun and Luo, Xichun; Yang, Chenguang and Xu, Yuchun, eds. (2022) Energy conversion model and extrusion 3D printing of piezoelectric composite energy harvesters. In: 2022 27th International Conference on Automation and Computing (ICAC). 2022 27th International Conference on Automation and Computing: Smart Systems and Manufacturing, ICAC 2022 . IEEE, GBR, pp. 1-6. ISBN 9781665498074 (

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Piezoelectric energy harvesters can realize conversion from mechanical energy to electric energy and power the electronic devices. In this work, based on the electro-elastic model of piezoelectric composites, considering the influence of external load on the piezoelectric coupling, a mathematical model for calculating the energy output of the piezoelectric energy harvesters is established through the coupled equations of elastic and electric fields, Kirchhoff's Circuit Law and the law of charge conservation. Barium Titanate/polydimethylsiloxane (BTO/PDMS) composites were fabricated by extrusion 3D printing. In addition to the conventional extrusion in air, a new water bath extrusion approach was also used to prove its feasibility in preparing piezoelectric composites. The results show that water bath extrusion has advantages in maintaining the shape of the structure. Moreover, the piezoelectric properties were evaluated by falling ball impact tests. The peak-to-peak value of the pulse produced by the energy harvester extruded in air and water bath were 1.74 V and 3.31V, respectively. The energy harvesters extruded in water bath achieved 1.9 times of output voltage of that extruded in air.


Shi, Xiaoquan, Sun, Yazhou, Li, Dekai, Liu, Haitao, Xie, Wenkun and Luo, Xichun ORCID logoORCID:; Yang, Chenguang and Xu, Yuchun