Exceeding milli-watt powering magneto-mechano-electric generator for standalone-powered electronics. Issue 4 (5th February 2018)

• Record Type: Journal Article
• Authors: Annapureddy, Venkateswarlu; Na, Suok-Min; Hwang, Geon-Tae; Kang, Min Gyu; Sriramdas, Rammohan; Palneedi, Haribabu; Yoon, Woon-Ha; Hahn, Byung-Dong; Kim, Jong-Woo; Ahn, Cheol-Woo; Park, Dong-Soo; Choi, Jong-Jin; Jeong, Dae-Yong; Flatau, Alison B.; Peddigari, Mahesh; Priya, Shashank; Kim, Kwang-Ho; Ryu, Jungho
• Is Part Of: Energy & environmental science. Volume 11:Issue 4(2018)
• Page Start: 818
• Page End: 829
• Publication Date: 2018-02-05
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c7ee03429f
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : A MME generator with a textured Fe–Ga alloy can generate over 1 mW power under a tiny magnetic field. 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(Mg1/3 Nb2/3 )O3 –Pb(Zr, Ti)O3 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 μT magnetic field.