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Parasitic magnetic noise arising from electrical power transmission system is the most abundant form of waste energy in our daily-life. In this work, a flexible and rollable magneto-mechano-electric nanogenerator (MMENG) based wireless IoT sensor has been demonstrated in order to capture and utilize the environmental magnetic noise in the absence of DC magnetic field. Free standing magnetoelectric composites are fabricated by combining magnetostrictive nickel ferrite (NiFe2O4) nanoparticles (~ 9 nm diameter) and piezoelectric polyvinylidene-co-trifluoroethylene (P(VDF–TrFE)) polymer. The magnetoelctric 0-3 type nanocomposites possess maximum magnetoelectric voltage co-efficient (α) of 11.43 mV/cm-Oe. Even, without magnetic bias field 99 % of the maximum α value is observed due to self-bias effect. The magnetoelectric voltage generation capability under low frequency (50-60 Hz) AC magnetic field, validated by theoretical simulation, enables the nanocomposite to design efficient MMENG for harvesting low fre...

Rollable Magnetoelectric Energy Harvester as a Wireless IoT Sensor