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Article

Novel Flexible Triboelectric Nanogenerator based on Metallized Porous PDMS and Parylene C

1
Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies, 73010 Arnesano (Lecce), Italy
2
Dipartimento di Ingegneria dell’Innovazione, Università del Salento, 73100 Lecce, Italy
3
Piezoskin s.r.l., 73010 Arnesano (Lecce), Italy
*
Author to whom correspondence should be addressed.
Energies 2020, 13(7), 1625; https://doi.org/10.3390/en13071625
Received: 9 March 2020 / Revised: 24 March 2020 / Accepted: 26 March 2020 / Published: 2 April 2020
Triboelectric nanogenerators (TENGs) have recently become a powerful technology for energy harvesting and self-powered sensor networks. One of their main advantages is the possibility to employ a wide range of materials, especially for fabricating inexpensive and easy-to-use devices. This paper reports the fabrication and preliminary characterization of a novel flexible triboelectric nanogenerator which could be employed for driving future low power consumption wearable devices. The proposed TENG is a single-electrode device operating in contact-separation mode for applications in low-frequency energy harvesting from intermittent tapping loads involving the human body, such as finger or hand tapping. The novelty of the device lies in the choice of materials: it is based on a combination of a polysiloxane elastomer and a poly (para-xylylene). In particular, the TENG is composed, sequentially, of a poly (dimethylsiloxane) (PDMS) substrate which was made porous and rough with a steam-curing step; then, a metallization layer with titanium and gold, deposited on the PDMS surface with an optimal substrate–electrode adhesion. Finally, the metallized structure was coated with a thin film of parylene C serving as friction layer. This material provides excellent conformability and high charge-retaining capability, playing a crucial role in the triboelectric process; it also makes the device suitable for employment in harsh, wet environments owing to its inertness and barrier properties. Preliminary performance tests were conducted by measuring the open-circuit voltage and power density under finger tapping (~2 N) at ~5 Hz. The device exhibited a peak-to-peak voltage of 1.6 V and power density peak of 2.24 mW/m2 at ~0.4 MΩ. The proposed TENG demonstrated ease of process, simplicity, cost-effectiveness, and flexibility. View Full-Text
Keywords: triboelectric nanogenerator (TENG); mechanical energy harvesting; single-electrode; tapping; flexibility; porous/rough PDMS; parylene C triboelectric nanogenerator (TENG); mechanical energy harvesting; single-electrode; tapping; flexibility; porous/rough PDMS; parylene C
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MDPI and ACS Style

Mariello, M.; Scarpa, E.; Algieri, L.; Guido, F.; Mastronardi, V.M.; Qualtieri, A.; De Vittorio, M. Novel Flexible Triboelectric Nanogenerator based on Metallized Porous PDMS and Parylene C. Energies 2020, 13, 1625. https://doi.org/10.3390/en13071625

AMA Style

Mariello M, Scarpa E, Algieri L, Guido F, Mastronardi VM, Qualtieri A, De Vittorio M. Novel Flexible Triboelectric Nanogenerator based on Metallized Porous PDMS and Parylene C. Energies. 2020; 13(7):1625. https://doi.org/10.3390/en13071625

Chicago/Turabian Style

Mariello, Massimo, Elisa Scarpa, Luciana Algieri, Francesco Guido, Vincenzo M. Mastronardi, Antonio Qualtieri, and Massimo De Vittorio. 2020. "Novel Flexible Triboelectric Nanogenerator based on Metallized Porous PDMS and Parylene C" Energies 13, no. 7: 1625. https://doi.org/10.3390/en13071625

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