Enhanced mechanical energy harvesting capability in sodium bismuth titanate based lead-free piezoelectric

Authors

Yong Zhang
Xiaofang Liu
Ge Wang
Yang Li
Shujun Zhang, University of WollongongFollow
Dawei Wang
Huajun Sun

RIS ID

141438

Publication Details

Zhang, Y., Liu, X., Wang, G., Li, Y., Zhang, S., Wang, D. & Sun, H. (2020). Enhanced mechanical energy harvesting capability in sodium bismuth titanate based lead-free piezoelectric. Journal of Alloys and Compounds, 825

Abstract

2020 Elsevier B.V. The demand for high-performance lead-free piezoelectric materials towards mechanical energy harvesting has been driven by the continuous requirements of self-powered applications such as wireless sensor network systems and biomedical devices, etc. Herein, manganese-doped sodium bismuth titanate based lead-free ternary piezoelectric system 0.92(Na0.5Bi0.5)TiO3-0.04(K0.5Bi0.5)TiO3-0.04BaTiO3 (NBT-KBT-BT) was developed and the critical role of manganese on tailoring the microstructure and electrical properties was investigated. The highest piezoelectric coefficient (d33) of 140 pC/N with figure of merit (d33 x g33) of 1790 x 10−15 m2/N has been achieved. Both high open-circuit voltage of ∼12.2 V and power density of ∼0.37 μW/mm3 were obtained based on cantilever-type energy harvester. This work provides a promising paradigm for the development of high-performance mechanical energy harvesting devices by tailoring the composition of lead-free piezoelectric ceramics.