Theoretical Study of the BaTiO₃ Powder's Volume Ratio's Influence on the Output of Composite Piezoelectric Nanogenerator.

Xi Zhou,Qi Xu,Yong Qin,Suo Bai,Weisheng Liu

doi:10.3390/nano7060143

Xi Zhou, Qi Xu + Show 3 more

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https://doi.org/10.3390/nano7060143

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Abstract

The combination of the piezoelectric materials and polymer is an effective way to make the piezoelectric nanogenerator (PENG) possess both the polymer’s good flexibility and ferroelectric material’s high piezoelectric coefficient. The volume ratio of ferroelectric material in the composite is an important factor that determines the PENG’s output performance. In this paper, the BaTiO3/polydimethylsiloxane (PDMS) composite PENG was demonstrated as having an optimal volume ratio (46%) at which the PENG can output its highest voltage, and this phenomenon can be ascribed to the trade-off between the composite PENG’s top electrode charge and its capacitance. These results are of practical importance for the composite PENG’s performance optimization.

Highlights

With the development of nanotechnology and micro-electromechanical systems (MEMS), the implantable medical devices, personal electronics, and distributed networks have been widely explored to facilitate people’s daily life
The composite piezoelectric nanogenerator (PENG) is approximated as a capacitor whose charge is generated by piezoelectric effects
This discrepancy is due to the fact that the external forces on the deformation of PENG are not considered

Summary

Introduction

With the development of nanotechnology and micro-electromechanical systems (MEMS), the implantable medical devices, personal electronics, and distributed networks have been widely explored to facilitate people’s daily life. It is especially inconvenient to replace depleted batteries for implantable medical devices because it is a miserable experience for patients and a high risk surgical procedure for surgeons. To solve the above-mentioned problems, piezoelectric nanogenerator [1], which can harvest abundant in vivo, in vitro body motion energy and environmental mechanical energy, is developed to provide power supply for the implantable medical devices [2,3,4,5,6,7], personal electronics [8,9,10,11,12,13,14,15], and distributed sensor networks. Composite PENG, based on inorganic piezoelectric material and organic polymer, is a promising candidate self-powered generators with both good flexibility and high piezoelectric coefficient

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Conclusion