Xiao Yana, Li Zihua, Tan Di, Carsten Gachot, Xu Bingang
Nanotechnology Center, School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, P. R. China.
Institute for Engineering Design and Product Development, Tribology Research Division, TU Wien, Leh´argasse 6 Objekt 7, Vienna, 1060, Austria.
Adv Sci (Weinh). 2024 Nov;11(43):e2409619. doi: 10.1002/advs.202409619. Epub 2024 Sep 25.
With burgeoning considerations over energy issues and carbon emissions, energy harvesting devices such as triboelectric nanogenerators (TENGs) are developed to provide renewable and sustainable power. Enhancing electric output and other properties of TENGs during operation is the focus of research. Herein, two species (NbSC and TaSC) of a new family of 2D materials, Transition Metal Carbo-Chalcogenides (TMCCs), are first employed to develop TENGs with doping into Polydimethylsiloxane (PDMS). Compared with control samples, these two TMCC-based TENGs exhibit higher electric properties owing to the enhanced permittivity of PDMS composite, and the best performance is achieved at a concentration of 3 wt. ‰ with open circuit voltage (Voc) of 112 V, short circuit current (Isc) of 8.6 µA and charge transfer (Qsc) of 175 nC for NbSC based TENG, and Voc of 127 V, Isc of 9.6 µA, and Qsc of 230 nC for TaSC based TENGs. These two TENGs show a maximum power density of 1360 and 911 mW m respectively. Moreover, the tribology performance is also evaluated with the same materials, revealing that the TaSC/PDMS composite as the electronegative material presented a lower coefficient of friction (COF) than the NbSC/PDMS composite. Their applications for energy harvesting and self-powered sensing are also demonstrated.
随着对能源问题和碳排放的日益关注，摩擦纳米发电机（TENGs）等能量收集装置被开发出来以提供可再生和可持续的电力。在运行过程中提高TENGs的电输出和其他性能是研究的重点。在此，首次采用二维材料新家族过渡金属碳硫族化合物（TMCCs）中的两种（NbSC和TaSC），通过掺杂到聚二甲基硅氧烷（PDMS）中来开发TENGs。与对照样品相比，这两种基于TMCC的TENGs由于PDMS复合材料介电常数的提高而表现出更高的电学性能，对于基于NbSC的TENG，在浓度为3 wt.‰时性能最佳，开路电压（Voc）为112 V，短路电流（Isc）为8.6 µA，电荷转移（Qsc）为175 nC；对于基于TaSC的TENGs，Voc为127 V，Isc为9.6 µA，Qsc为230 nC。这两种TENGs的最大功率密度分别为1360和911 mW m 。此外，还使用相同材料评估了摩擦学性能，结果表明，作为负极材料的TaSC/PDMS复合材料的摩擦系数（COF）低于NbSC/PDMS复合材料。还展示了它们在能量收集和自供电传感方面的应用。
