Lv Shasha, Zhang Xin, Huang Tao, Yu Hao, Zhang Qinghua, Zhu Meifang
State Key Laboratory for Modification of Chemical Fibers & Polymer Materials, College of Materials Science & Engineering, Donghua University, Shanghai 201620, P. R. China.
ACS Appl Mater Interfaces. 2021 Jan 20;13(2):2566-2575. doi: 10.1021/acsami.0c18243. Epub 2021 Jan 7.
Exploring effective methods of increasing the triboelectric charge density of tribo-materials to boost the output performance of triboelectric nanogenerators (TENGs) is crucial for expanding their practical applicability in modern smart devices. This study discusses the incorporation of various polymeric dielectric layers between the tribo-material and electrode components of TENGs, which improved their electrical output performance to varying degrees. The TENG demonstrating the largest improvement (1200 V) was obtained after adding a polyimide layer. The analysis presented herein suggests that incorporating a dielectric layer with high trap energy means that more charges are held in deep traps; thus, such TENGs demonstrate the best electrical performance. Additionally, when a dielectric layer is added to the triboelectric material, the enhanced TENG output is related to the volume conductivity of the triboelectric material, but not to its electronegativity or surface structure. Finally, the optimized TENG developed in this work demonstrates energy harvesting capabilities and can function as a self-powered sensor applied in an intelligent housing system and as an emergency fall detection/alert system for the elderly and the sick.
探索提高摩擦材料摩擦电荷密度以提升摩擦电纳米发电机（TENG）输出性能的有效方法，对于扩大其在现代智能设备中的实际应用至关重要。本研究讨论了在TENG的摩擦材料和电极组件之间引入各种聚合物介电层，这在不同程度上改善了它们的电输出性能。添加聚酰亚胺层后获得了改善最大（1200V）的TENG。本文提出的分析表明，引入具有高陷阱能量的介电层意味着更多电荷被捕获在深陷阱中；因此，此类TENG表现出最佳的电性能。此外，当在摩擦电材料上添加介电层时，增强的TENG输出与摩擦电材料的体电导率有关，而与其电负性或表面结构无关。最后，本工作中开发的优化TENG展示了能量收集能力，并且可以用作应用于智能房屋系统的自供电传感器以及用于老年人和病人的紧急跌倒检测/警报系统。
