2-Dimensional rGO introduced PMN-PT and P(VDF-TrFE) flexible films for enhanced piezoelectric energy harvester
- Authors
- Kim, Jinhwan; Ji, Jae-Hoon; Shin, Dong-Jin; Yoon, Sanghyun; Ko, Young-Ho; Cho, Kyung-Ho; Koh, Jung-Hyuk
- Issue Date
- Nov-2019
- Publisher
- ELSEVIER
- Keywords
- Piezoelectric; Energy harvesting; Ceramic/polymer composite film
- Citation
- APPLIED SURFACE SCIENCE, v.494, pp 1000 - 1006
- Pages
- 7
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 494
- Start Page
- 1000
- End Page
- 1006
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/36968
- DOI
- 10.1016/j.apsusc.2019.06.236
- ISSN
- 0169-4332
1873-5584
- Abstract
- Piezoelectric materials have excellent piezoelectric and dielectric properties for versatile device applications. However, they have brittle properties, particularly under mechanical impulse force. As a result, there have been many attempts to improve their brittle properties by mixing in elastic materials. Here, for the first time, reduced graphene oxide (rGO) was introduced to the Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) and poly(vinylidene fluoridetrifluoroethylene) P(VDF-TrFE) polymer composite films, and showed the highest value of piezoelectric and energy density for flexible energy generation applications. rGO has conducting properties with 2-dimensional structure. This rGO can also be prepared through easy processing. 2-dimensional structured rGO serves as a floating electrode in PMN-PT/polymer composite flexible films. Therefore, a floating electrode can attract electrons in piezoelectric composite materials so as to enhance the energy generation properties. By introducing the rGO based floating electrodes into the PMN-PT and P(VDF-TrFE) composite, the generated output energy density was increased from 0.70 mJ/cm(3) to 1.2 mJ/cm(3). This the generated output energy density was the recorded outstanding value among the flexible composite films. In this paper, the effects of rGO on the properties of PMN-PT/polymer composites will be investigated and discussed.
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Collections - College of ICT Engineering > School of Electrical and Electronics Engineering > 1. Journal Articles
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