Electrical energy generated by silicone elastomers filled with nanospring-carbon-nanotubes filled with nanospring-carbon-nanotubes
- Electrical energy generated by silicone elastomers filled with nanospring-carbon-nanotubes filled with nanospring-carbon-nanotubes
- 최원국; 김정혁; 함소라; Yun Jae Lee; Philip Caspari; Dorina M. Opris; Frank A. Neusch; Sung-Ryong Kim; Byeong-Kwon Ju
- energy harvesting; Nano spring CNT; silicon elastomer; dielectric permittivity; Dielectric elastomer generators
- Issue Date
- Journal of materials chemistry. C, Materials for optical and electronic devices
- VOL 7, NO 12-3542
- Dielectric elastomer generators (DEGs) are flexible capacitors that convert mechanical into electrical energy. They rely on an external voltage source to charge the capacitor during each operation cycle. An alternative to this is an autonomous DEG which operates with an electret as integrated voltage source. To increase the amount of energy generated per cycle, elastomers with increased permittivity, low viscoelastic losses and high strain at break are of advantage. Here, we report the synthesis of elastic materials with increased permittivity by blending different silicone matrices with nanospring carbonnanotubes (NS-CNTs) particles and their performance as dielectric in electret DEGs. The best material developed has a dielectric permittivity of e0 = 4.6, a mechanical loss factor of 0.03 and a strain at break of 270%. The output voltage of the DEG constructed using this composite increases from 8.8 V to 14.5 V, when the strain increases from 33% to 66%, respectively. Additionally, the output voltage increases with the rise in permittivity, from 9.3 V for a regular polydimethylsiloxane elastomer (e0 = 2.9) to 14.5 for the best composite (e0 = 4.6).
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