Issue 14, 2015
From the journal:

RSC Advances

Selective current collecting design for spring-type energy harvesters†

Dongjin Kim,ab   Hee Seok Roh,c   Yeontae Kim,a   Kwangsoo No*a  and  Seungbum Hong*ab  

* Corresponding authors

a Department of Materials Science and Engineering, KAIST, Daejeon 305-701, Korea
E-mail: seungbum@kaist.ac.kr, ksno@kaist.ac.kr

b Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
E-mail: hong@anl.gov

c Nuclear Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA

Abstract

Here we present a high performance spring-type piezoelectric energy harvester that selectively collects current from the inner part of a spring shell. We analyzed the main reason behind the low efficiency of the initial design using finite element models and proposed a selective current collecting design that can considerably improve the electrical conversion efficiency of the energy harvester. We found that the newly designed energy harvester increases the output voltage by 8 times leading to an output power of 2.21 μW under an impulsive load of 2.18 N when compared with the conventional design. We envision that selective current collecting design will be used in spring-based self-powered active sensors and energy scavenging devices.

Graphical abstract: Selective current collecting design for spring-type energy harvesters

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Article information

DOI
https://doi.org/10.1039/C4RA16443A
Article type
Communication
Submitted
15 Dec 2014
Accepted
07 Jan 2015
First published
13 Jan 2015

RSC Adv., 2015,5, 10662-10666

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Selective current collecting design for spring-type energy harvesters

D. Kim, H. S. Roh, Y. Kim, K. No and S. Hong, RSC Adv., 2015, 5, 10662 DOI: 10.1039/C4RA16443A

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