A spring-type piezoelectric energy harvester
- Authors
- Kim, Dongjin; Hong, Seungbum; Li, Dongjun; Roh, Hee Seok; Ahn, Gun; Kim, Jiyoon; Park, Moonkyu; Hong, Jongin; Sung, Tae-hyun; No, Kwangsoo
- Issue Date
- Mar-2013
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.3, no.10, pp.3194 - 3198
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 3
- Number
- 10
- Start Page
- 3194
- End Page
- 3198
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/163253
- DOI
- 10.1039/c2ra22554a
- Abstract
- We developed a three-dimensional spring-type piezoelectric energy harvester using a dip-coating method and multi-directional electrode deposition. The energy harvester consists of a bi-layered structure composed of a surface electrode and a ferroelectric polymer, on a conventional spring which has two roles - the core electrode and the mechanical substrate for the ferroelectric polymer. The energy harvester generated an output voltage of up to 88 mV as a function of cycling compression stress, which leads to a piezoelectric constant of 28.55 pC N-1 for unpoled P(VDF-TrFE) films. Since the spring structure significantly decreases the resonance frequency of the harvester, the spring-type energy harvester can effectively generate electricity using low-frequency vibration energy abundant in the nature.
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