Energy harvesting device based on a metallic glass/PVDF magnetoelectric laminated composite

Abstract

A flexible, low-cost energy-harvesting device based on the magnetoelectric (ME) effect was designed using Fe 64 Co 17 Si 7 B 12 as amorphous magnetostrictive ribbons and polyvinylidene fluoride (PVDF) as the piezoelectric element. A 3 cm-long sandwich-type laminated composite was fabricated by gluing the ribbons to the PVDF with an epoxy resin. A voltage multiplier circuit was designed to produce enough voltage to charge a battery. The power output and power density obtained were 6.4 μW and 1.5 mW cm −3 , respectively, at optimum load resistance and measured at the magnetomechanical resonance of the laminate. The effect of the length of the ME laminate on power output was also studied: the power output exhibited decays proportionally with the length of the ME laminate. Nevertheless, good performance was obtained for a 0.5 cm-long device working at 337 KHz within the low radio frequency (LRF) range.

Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications

“…Harvesting this weak and low-frequency magnetic noise (< 1 mT = 10 G) to develop a consistent electricity source remains a difficult challenge. Over the last decade, Ryu group [47,94,95] and other researchers [96][97][98][99][100][101][102][103][104][105] have investigated methods to obtain optimum electricity from the tiny magnetic fields in the surroundings, using magneto-mechano-electric (MME) mechanism. The operation mechanism can be described as follows: When the ME composite is placed in an AC magnetic field, the magnetostrictive layer in the composite responds to the mechanical vibration (magneto-mechano coupling), thereby straining the piezoelectric layer, which results in an output voltage across the electrical load through the direct piezoelectric effect (mechano-electric coupling).…”

“…Summary of reported power densities from the MME harvesters made with different composite systems. Data are from references [94,[96][97][98][99][100][101][102][103][104][105].…”

Compelling Rejuvenated Catalytic Performance in Metallic Glasses

“…[6][7][8][9] Specially, enormous advances have been made in the use of MGs as structural engineering materials according to physical and mechanical properties (microscanner, [10] and gears system, [11] etc.). In addition, many encouraging results have been achieved in advanced functional properties, such as MgZnCa MGs as biodegradable implants because of extended solubility and good compatibility, [12] FeCoSiB MGs as energy harvesting devices attributed to high magnetostriction, [13] and PtCuNiP glassy nanowires as electrochemical devices ascribed to outstanding durability. [14] Recently, there have been significant developments of MGs in the functional applications as catalysts, demonstrating far greater efficiency than crystalline catalysts.…”

Intrinsically Tuning the Electromechanical Properties of Elastomeric Dielectrics: A Chemistry Perspective

“…However, to date no modified materials have exceeded the figure of merit for generation value of 1, that of PVDF. Some recent examples of PVDF energy harvesting devices are given in the following references, where these typically demonstrated an ability to harvest energy in µW quantities. This is primarily due to the high breakdown strength of PVDF, which has not yet been matched in chemically modified dielectric elastomers, although PVDF suffers from a low elastic strains (for harvesting) and relatively high stiffness (for actuation).…”