Enhanced Energy Conversion Performance of a Magneto–Mechano–Electric Generator Using a Laminate Composite Made of Piezoelectric Polymer and Metallic Glass

Magneto–mechano–electric (MME) generators, which convert ubiquitous stray magnetic field into electricity, have attracted significant attention as a permanent power source for innumerable sensors. In this study, a MME generator based on magnetostrictive metallic substrate and piezoelectric polymer is reported. After the metallic glass sheets are stacked using adhesives, ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) is spin-casted onto Metglas lamination. The fabricated MME generator harvests an output peak voltage of ≈12.5 V under the applied alternating current magnetic field of 7 Oe at 38.2 Hz. A high magnetoelectric voltage coefficient of 910.14 V cm⁻¹ Oe⁻¹ obtained from the energy device is higher than those reported earlier in inorganic and polymeric piezoelectric components-based MME generators. Moreover, finite element analysis using the multiphysics simulation is carried out to theoretically investigate the magnetoelectric energy harvesting of the fabricated MME generator. This research results achieve low cost, mechanical stability, eco-friendliness, and high performance for MME generators, which is anticipated to provide a future direction for magnetoelectric energy harvesting.