A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Abstract

It is desired to obtain a piezoceramic with a high piezoelectric coefficient and low dielectric loss simultaneously for energy harvester application. Herein, it is reported that the 0.025Pb(Mn1/3Nb2/3)O3‐0.525Pb(Ni1/3Nb2/3)O3‐0.135PbZrO3‐0.315PbTiO3 (PMNN‐PZT) ceramic exhibits superior piezoelectric charge parameter e33 of 37.74 pC m−2 and low dielectric loss tanδ of 0.45%. Furthermore, a PMNN‐PZT ceramic‐based magneto‐mechano‐electric coupled energy harvester (MMEC‐EH) with a varying‐stiffness cantilever is designed and fabricated, which shows the strong self‐resonance effect in response to a random, transient impulse vibration or magnetic field stimulus. The investigations show that under a 0.6 s pulse vibration stimulus, the MMEC‐EH can tune itself into self‐resonance damping oscillation lasting for six seconds at its resonance frequency of 16 Hz, and the produced maximum power is 1.96 mWRMS. Under both weak magnetic field and force‐field dual‐stimulus (Hac = 0.5 Oe and a = 0.05 g), the generated power density is about 60 mWRMS Oe−2g−2cm−3, which is one to two orders of magnitude higher than those previously reported MMEC‐EHs. Finally, the MMEC‐EH is successfully demonstrated to power temperature/humidity sensors, indicating its potential for harvesting both weak vibration and magnetic field energy from environments for self‐powered sensor application.

Significant Output Power Enhancement in Symmetric Dual‐Mode Magneto‐Mechano‐Electric Coupled Resonators

“…Table 1 illustrates a comparison of the output power of the symmetric dual‐mode TFS‐MME energy harvester with those of recently reported MME energy harvesters operating in low frequency range. [ 1,10,12,17,20,21,23,28,30 ] It is clearly seen that the symmetric dual‐mode TFS‐MME energy harvester proposed in this work has an outstanding output performance with the highest normalized output power compared with state‐of‐the‐art MME devices even using extremely expensive piezoelectric single crystal. [ 10,12,20,21 ]…”

“…Table 1 illustrates a comparison of the output power of the symmetric dual-mode TFS-MME energy harvester with those of recently reported MME energy harvesters operating in low frequency range. [1,10,12,17,20,21,23,28,30] It is clearly seen that the symmetric dual-mode TFS-MME energy harvester proposed in this work has an outstanding output performance with the highest normalized output power compared with state-of-the-art MME devices even using extremely expensive piezoelectric single crystal. [10,12,20,21] Again, the enhanced output power of the energy harvester can be attributed to the amplified stress acted on one-pair piezoelectric ceramic pieces due to varying stiffness of the TFS, and strong mechanical coupling between two beams with symmetric dual-mode bending vibrations.…”

Autonomous Resonance‐Tuning Mechanism for Environmental Adaptive Energy Harvesting

“…These tasks may be impossible in harsh environments, such as the outside walls of skyscrapers, deep undersea, and expansive forests. [ 5 , 6 , 7 ] Energy harvesting technology that captures unused ambient energy and converts it into usable electrical power can provide the most feasible solution for this problem. [ 8 , 9 , 10 ]…”

“…These tasks may be impossible in harsh environments, such as the outside walls of skyscrapers, deep undersea, and expansive forests. [5][6][7] Energy harvesting technology that captures unused ambient energy and converts it into usable electrical power can provide the most feasible solution for this problem. [8][9][10] Among ambient energies, mechanical energy is commonly available around us, particularly in industrial sites, transportation systems, and household appliances, and has a relatively higher energy density than other energy sources.…”

Self‐biased magnetoelectric composite for energy harvesting

“…and utilizing energy sources from the surrounding environment, such as light, mechanical vibration, wind energy, waves, and magnetic fields. [13][14][15][16] The application of multiferroic magnetoelectric (ME) materials, which realize the mutual coupling (ME coupling effect) of ferroelectric ordering and magnetic ordering (Figure 1A), in the fields of magnetic sensors, [17][18][19][20] spintronics, [21][22][23][24] data storage, [25][26][27][28][29] and energy harvesting [29][30][31][32] can be further broadened. ME composite systems composed of piezoelectric phases (P) and magnetostrictive phases (M) and possessing strong room temperature ME coupling (high ME conversion efficiency) are drawing considerable interest in the fields of vibration energy and magnetic energy harvesting.…”