Annapureddy, Venkateswarlu and Na, Suok-Min and Hwang, Geon-Tae and Kang, Min Gyu and Sriramdas, Rammohan and Palneedi, Haribabu and Yoon, Woon-Ha and Hahn, Byung-Dong (2018) Exceeding milli-watt powering magneto-mechano-electric generator for standalone-powered electronics. Energy and Environmental Science , 11 (4). pp. 818-829. ISSN 1754-5692

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Abstract

In contrast to typical magnetic energy generators that use electromagnetic induction, which are bulky and have low generation efficiency under small magnetic fields at low frequency, magneto-mechano-electric (MME) generators utilizing the magnetoelectric (ME) coupling effect and magnetic interactions are considered promising candidates. MME generators will serve as a ubiquitous autonomous energy source converting stray magnetic noise to useful electric energy for applications in wireless sensor networks (WSN) for the Internet of Things (IoT) and low-power-consuming electronics. The key component in a MME generator is the ME composite consisting of piezoelectric and magnetostrictive materials, which elastically couples the electric and magnetic behaviour of the respective constituent. Here, we report a MME generator consisting of a crystallographically oriented Pb(Mg1/3Nb2/3)O-3-Pb(Zr,Ti)O-3 piezoelectric single crystal macro-fibre composite and a highly textured magnetostrictive Fe-Ga alloy, which exhibits an exceptionally high rectified DC output power density of 3.22 mW cm(-3). The large energy generation in this structure is ascribed to the coupling between the strong anisotropic properties of the piezoelectric single crystal fibres and textured Fe-Ga magnetostrictive alloy. A smart watch with IoT sensors was driven by the MME generator under a 700 mu T magnetic field.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects:	Chemistry Earth Sciences Energy Fuels
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	29 Nov 2019 10:38
Last Modified:	29 Nov 2019 10:38
URI:	http://npl.csircentral.net/id/eprint/3898

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