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Evaluation of DLC, MoS₂, and Ti₃C₂Tₓ thin films for triboelectric nanogenerators

Title data

Tremmel, Stephan ; Luo, Xiongxin ; Rothammer, Benedict ; Seynstahl, Armin ; Wang, Bo ; Rosenkranz, Andreas ; Marian, Max ; Zhu, Laipan:
Evaluation of DLC, MoS₂, and Ti₃C₂Tₓ thin films for triboelectric nanogenerators.
In: Nano Energy. Vol. 97 (March 2022) . - No. 107185.
ISSN 2211-2855
DOI: https://doi.org/10.1016/j.nanoen.2022.107185

Abstract in another language

Due to their cost-effective fabrication, easy integration, and low frequency working range, triboelectric nanogenerators (TENGs) demonstrate tremendous potential in green energy harvesting to power smart devices and the internet of things (IoT). However, there is an urgent need to synergistically maximize their output and improve their durability to ensure a long-lasting high performance. This study aims at elucidating the performance of protective thin films deposited on the wear-prone PTFE surface of TENGs including doped and undoped, single- and multi-layer hydrogenated DLC films, MoS₂ coatings fabricated by physical vapor deposition and multi-layer Ti₃C₂Tₓ (MXene) films. The deposited coatings are characterized by electron microscopy, and Raman spectroscopy. Their triboelectric performance is analyzed for TENGs operating in contact separation and freestanding sliding modes. We verified that MXenes outperformed the other films in contact separation mode due to the good electron gain ability of functional oxygen and fluorine groups. In sliding mode, the undoped a-C:H coating performed on a comparable level to the uncoated reference and superior to the tungsten-doped DLC and MoS₂ films. The film withstood long-term tests without notable signs of wear; merely the output slowly decreased with time due to graphitization and thus potential material transfer to the mating body.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD > Chair Engineering Design and CAD - Univ.-Prof. Dr.-Ing Stephan Tremmel
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 31 Mar 2022 06:35
Last Modified: 31 Mar 2022 06:35
URI: https://eref.uni-bayreuth.de/id/eprint/69073