The effect of poling conditions on the performance of piezoelectric energy harvesters fabricated by wet chemistry

Abstract

The effect of poling conditions on the power output of piezoelectric energy harvesters using sol–gel based Pb(Zr0.53,Ti0.47)O3–Pb(Zn1/3,Nb2/3)O3 piezoelectric thin-films has been investigated.

Hybrid lead-free polymer-based nanocomposites with improved piezoelectric response for biomedical energy-harvesting applications: A review

“…There is one other well-known process to increase the piezoelectric constant of a polymer, namely, poling in a high external electrical field 35 [138][139][140]. It has also been reported that poling improves the piezoelectric properties of piezoceramics [141][142][143]. To facilitate poling and to collect the piezoelectric output voltage, electrodes must be applied.…”

“…Recently, E. Nilson et al reported that a strong piezoelectric effect can be achieved for PVDF fibres with a conductive composite based on carbon black and polyethylene using as high a poling voltage as possible and a poling temperature between 60 °C and 120 °C [144]. This can be explained by the heating of the polymer leading to an increase in the mobility of the molecular chain and, thus, a slight reduction in the coercive field and an increase in the charge- ceramics increased significantly as the poling electric field and poling temperature are increased [141][142][143].…”

A microcube-based hybrid piezocomposite as a flexible energy generator

“…[1][2][3][4] A variety of energy harvesting techniques to collect waste energy from the ambient environment have been extensively studied, such as solar cells for sunlight, thermoelectric devices for gradient heat, and piezoelectric and triboelectric materials for mechanical motion. 5,6 Among them, mechanical sources (e.g. the vibrations of machines, human activities, automobile movement, acoustic waves, etc.…”

Electric-Field-Dependent Surface Potentials and Vibrational Energy-Harvesting Characteristics of Bi(Na0.5Ti0.5)O3-Based Pb-Free Piezoelectric Thin Films

“…It is noticeable that oxygen vacancies were created after the poling since the ratio of the concentration of oxygen vacancies O V to that of lattice oxygen O L increased from ∼0.12 to ∼0.28 after the poling, as evident in Figure d. It has been reported that the poling process directs the oxygen vacancies toward the surface since the strong electric field reorients the defect dipoles, typically the pairs of cation and oxygen vacancies . With the stabilization of the dipoles under the external bias, more oxygen vacancies were likely positioned near the film surface …”