Tunable Buckled Beams with Mesoporous PVDF-TrFE/SWCNT Composite Film for Energy Harvesting
| Autor: | Zi Chen, Jifeng Liu, Xiaomin Han, John X. J. Zhang, Meagan Oglesby, Sidan Fu, Marc D. Feldman, Gladys Patricia Escobar, Lin Dong, Andrew B. Closson, Yin Liu, Zhe Xu, Chunsheng Wen, Nanjing Hao |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Composite number 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Piezoelectricity Article 0104 chemical sciences law.invention law General Materials Science Boundary value problem Thin film Composite material 0210 nano-technology Mesoporous material Energy harvesting Beam (structure) |
| Zdroj: | ACS Applied Materials & Interfaces. 10:33516-33522 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.8b09310 |
| Popis: | By incorporating mesoporous piezoelectric materials and tuning mechanical boundary conditions a simple beam structure can significantly take advantage of limited mechanical displacements for energy harvesting. Specifically, we employed a mesoporous PVDF-TrFE composite thin film mixed with single-wall carbon nanotubes to improve the formation of the crystalline phase in this piezoelectric polymer. The film was then patterned on a thin buckled beam to form a compact energy harvester, which was used to study the effects of two boundary conditions, including the end rotation angle and the location of a mechanical stop along the beam. We carefully designed controlled experiments using mesoporous PVDF-TrFE film and PVDF-TrFE/SWCNT composite films, both of which were tested under two cases of boundary conditions, namely, the rotation of the end angle and the addition of a mechanical stop. The voltage and current of the energy harvester under these two boundary conditions were, respectively, increased by approximately 160.1% and 200.5% compared to the results of its counterpart without imposing any boundary conditions. Thereby, our study offers a promising platform for efficiently powering implantable and wearable devices for harnessing energy from the human body which would otherwise have been wasted. |
| Databáze: | OpenAIRE |
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