TRIBOELECTRIC NANOGENERATORS: HARNESSING OCEAN WAVE ENERGY AND EXPLORING FIBER-BASED APPLICATIONS

Date

2024-9-05

Author

Demircioğlu, Onur

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

45
views

0
downloads

Cite This

Triboelectric effect, known for over 2600 years, was considered problematic due to its consequences, such as short circuits and static electricity damage. However, the development of triboelectric nanogenerators (TENGs) has revolutionized this perspective, transforming it into a tool for energy harvesting and self-powered sensing, especially for the growing Internet-of-Things (IoT) sector. This shift in understanding has opened new possibilities for TENGs, particularly in areas such as marine environment where there is need for a constantly working energy sources, and flexible, self-powered sensors. In the second part of this thesis, the development and testing of a spherical modified buoy-based triboelectric nanogenerator (MBB-TENG) is presented. The MBB-TENG, incorporates a pendulum mechanism for contact-separation between triboelectric materials of polyurethane (PU) foam and polydimethylsiloxane (PDMS). It achieved an open-circuit voltage (Voc) of 145 V, short-circuit current (Isc) of 8.9 μA, and the power density of 1.1 W/m². The device demonstrated stable performance over 1200 cycles, indicating its potential for powering marine systems such as refrigeration and lighting when multiple units are connected. In the third part of this thesis, the fabrication of core-shell fibers via wet-spin method is presented. These fibers, with a carbon black and thermoplastic polyurethane (TPU) core and a titanium sulfide (TiS₂) nanosheet and TPU shell, showed improved TENG performance, particularly after TiS₂ oxidation. The highest power density of 5.02 μW/cm² was observed in fibers with a TiO₂ content of 5 wt.%, highlighting the potential of two-dimensional materials to enhance TENG efficiency. These findings position core-shell fibers as promising candidates for flexible energy-harvesting applications.

Subject Keywords

Triboelectric nanogenerators, Blue energy harvesting, Flexible electronics

URI

https://hdl.handle.net/11511/111530

Collections

Graduate School of Natural and Applied Sciences, Thesis