A modified barbell-shaped PNN-PZT-PIN piezoelectric ceramic energy harvester

作者：Gao, Xiangyu; Wu, Jingen; Yu, Yang; Dong, Shuxiang^*

来源：Applied Physics Letters, 2017, 111(21): 212904.

DOI：10.1063/1.5001803

• MORPHOTROPIC PHASE-BOUNDARY

The quaternary system of relaxor-ferroelectric based Pb(Ni1/3Nb2/3)O-3-Pb(ZrxTi1-x)O3Pb(In0.5Nb0.5)O-3 (PNN-PZT-PIN) piezoelectric ceramic at the morphotropic phase boundary was investigated via the solid reaction method. The optimized ceramic with excellent electric properties of epsilon(r) = 8084, d(33) = 977 pC/N, k(p) = 0.61, and E-c = 3.0 kV/cm was fabricated into d(33)-mode discs with separated surface electrodes, which were arranged in a series connection and, then as a piezo-stack, assembled into a barbell-shaped energy harvester that could bear a strong mechanical vibration. It is found that under a vibration mass-induced bending moment, the energy harvester produces an open circuit voltage of 26.4 Vp-p at the acceleration of 2.5 g at a load of 1.56 M Omega, which is two times higher in comparison to one without surface electrode separation. Its power output is 30 mu W at the acceleration of 1 g and 104 mu W at 2.5 g, which are even six times higher than that of a previously reported barbell-shaped energy harvester at room-temperature with the same acceleration. The enhanced power output can be attributed to (i) the excellent piezoelectric response of PNN-PZT-PIN ceramic and (ii) harvesting positive and negative charges from the separated surface electrodes other than a full surface electrode on piezoelectric discs under bending moment. Furthermore, the practical test was performed within a car engine, which shows that the PNN-PZT-PIN piezoelectric ceramic is a promising candidate for vibration energy harvesting. Published by AIP Publishing.

• 出版日期2017-11-20
• 单位北京大学