Multifunctional and Physically Transient Supercapacitors, Triboelectric Nanogenerators and Capacitive Sensors

Date

2023-7

Author

Durukan, Mete Batuhan.

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Electronic waste (e-waste) grows parallel with the increasing need for consumer electronics. This, unfortunately, is leading to pollution and massive ecological problems worldwide. A standing-out solution to this problem is the use of transient electronics. While the transiency of a few components such as transistors and batteries are proposed already, it is crucial to have all elements in electronic devices to be transient. Therefore, the transiency of more electronic components should be demonstrated to alleviate the e-waste problem. Herein, multifunctional nanocomposite electrodes were fabricated using poly(vinyl alcohol) (PVA), carbon black, and activated carbon. These simple electrodes were then used to fabricate physically transient supercapacitors, triboelectric nanogenerators, and capacitive sensors. Transient supercapacitors (T-SUPC) were used numerous times with excellent supercapacitive behavior before being discarded, which showed promise as an energy storage component for transient systems. Fabricated transient triboelectric nanogenerators (T-TENG) were used to harvest mechanical energy, eliminating the need for an external power supply and paving the way to self-powered devices like a touchpad. Fabricated transient capacitive sensors (T-CAPS), on the other hand, showed extended linear sensitivities and offered waste-free monitoring of physiological signals and body motions. These devices are fabricated using similar materials and layers, proving that multifunctionality is critical to achieve simple transient electronic systems.

Subject Keywords

transient electronics, supercapacitors, triboelectric nanogenerators, capacitive sensors, flexible electronics

URI

https://hdl.handle.net/11511/105112

Collections

Graduate School of Natural and Applied Sciences, Thesis