"Magnetoelectric Composite Materials and Their Energy Harvesting Application"
Jungho Ryu, Ph.D. Professor of School of Materials Science & Engineering, Yeungnam University, Korea
Abstract
The deployment of wireless sensor networks (WSNs) for the Internet of Things (IoT) and remote monitoring devices has advanced significantly in recent years. Concurrently, energy harvesters have been developed to meet the power requirements of WSNs and other low-power consumption electronics. Among the various energy harvesting resources, the magnetic noise produced by power transmission infrastructures and the associated mechanical vibrations are ubiquitous energy sources that could be converted into electricity using energy conversion materials or devices. This naturally raises the question: “How can we efficiently convert this wasted and potentially harmful energy source for IoT devices?”
In this presentation, the status and prospects of magnetoelectric (ME) composites and an emerging magnetic energy harvesting technology, the so-called magneto-mechano-electric (MME) generators, will be reviewed. An MME generator is an effective way to get an improved electric power density using with ME composite composed of piezoelectric single crystal and magnetostrictive shim. Since the piezoelectric phase in the MME generator also responds directly to mechanical vibration directly, an ME-based energy harvester can harness energy from both mechanical vibrations and magnetic fields simultaneously. The MME generator has the potential to be a ubiquitous power source for WSNs and low-power electronic devices by harvesting energy from the weak magnetic fields present as parasitic magnetic noise in ambient environments.
References
[1] J. Ryu, et al., “Ubiquitous Magneto-Mechano-Electric Generator,” Energy Environ. Sci., 8 2402-2408 (2015)
[2] V. Annapureddy, J. Ryu, et al., “Low-loss Piezoelectric Single-Crystal Fibers for Enhanced Magnetic Energy Harvesting with Magnetoelectric Composite,” Adv. Energy Mater., 2016 1601244 (2016)
[3] V. Annapureddy, J. Ryu, et al., Exceeding Milli-Watt Powering Magneto-Mechano-Electric Generator for Standalone-Powered Electronics”, Energy Environ. Sci.,11 818-829 (2018)
[4] K.-W. Lim, J. Ryu, et al., “High Output Magneto‐mechano‐triboelectric Generator Enabled by Accelerated Water‐soluble Nano‐bullets for Powering Wireless Indoor Positioning System”, Energy Environ. Sci., 12 666-674 (2019)
[5] H. Song, J. Ryu et al., “Significant Power Enhancement of Magneto-Mechano-Electric Generators by Magnetic Flux Concentration,” Energy & Environmental Sci. 13, 4238-4248 (2020)
[6] H. Song, J. Ryu et al., “Stable Output Performance Generated from a Broadband Magneto-Mechano-Electric Generator with Movable Proof Mass,” Nano Energy, 101 107607 (2022)
[7] H. Palneedi, J. Ryu, “Intense pulsed light thermal treatment of Pb(Zr,Ti)O3/Metglas Heterostructured films resulting in extreme magnetoelectric coupling of over 20 V cm-1Oe-1” Adv. Mater., 35 [32] 2303553 (2023)
[8] J.H. Park, J. Ryu et al., Light-induced Materials for Energy Conversion and Storage Applications,” Nano-Micro Lett., in-print
Short Bio of Jungho Ryu
Dr. Jungho Ryu is a professor at the School of Materials Science and Engineering, Yeungnam University, Korea. He completed his Ph.D. degree at the School of Materials Science and Engineering, Seoul National University, Korea in 2001, specializing in Magnetoelectric composite materials. During his Ph.D. research, Dr. Ryu worked at the International Center for Actuators and Transducers (ICAT) of Pennsylvania State University, focusing on magnetoelectric composites and piezoelectric materials. Following his Ph.D., he continued his research on high-power piezoelectric materials as a postdoctoral researcher at the same center. Before joining Yeungnam University in 2018, Dr. Ryu held positions as a senior engineer and project leader at Samsung Electro-Mechanics Co. Ltd, Korea (2003-2006), and as a principal researcher at the Korea Institute of Materials Science (KIMS), Korea (2006-2018).
His current research interests include the development and processing of functional ceramic materials, energy harvesting, smart actuators and sensors, and the fabrication of functional thin/thick ceramic films through the aerosol deposition process.
Dr. Ryu has an extensive publication record, with over 310 publications in peer-reviewed international journals, and he holds more than 100 patents in the fields of magnetoelectric and piezoelectric materials and devices, as well as functional ceramic films. His research articles have been cited over 16500 times, and he has an h-index of over 60.