Gd5Si4-PVDF nanocomposite films and their potential for triboelectric energy harvesting applications

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2019-03-13
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Harstad, S. M.
Zhao, P.
Soin, N.
El-Gendy, A. A.
Gupta, Shalabh
Pecharsky, Vitalij
Luo, J.
Hadimani, Ravi
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Ames National LaboratoryElectrical and Computer EngineeringMaterials Science and Engineering
Abstract

The triboelectric energy generators prepared using the combination of self-polarized, high beta-phase nanocomposite films of Gd5Si4-PVDF and polyamide-6 (PA-6) films have generated significantly higher voltage of 425 V, short-circuit current density of 30 mA/m(2) and a charge density of similar to 116.7 C/m(2) as compared to corresponding values of 300 V, 30 mA/m(2) and 94.7 mu C/m(2), respectively for the pristine PVDF-(PA-6) combination. The magnetic measurements of the Gd5Si4-PVDF films display a ferromagnetic behavior as compared to diamagnetic nature of pristine PVDF. The presence of magnetic nanoparticles in the polymeric matrix allows for some control over the microstructural properties during the preparation process. The results open new routes for multiferroic composite films to be suitable for multi-functional magnetic and triboelectric energy harvesting applications.

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