Liu Lu, Zhao Zhihao, Li Yanhong, Li Xinyuan, Liu Di, Li Shaoxin, Gao Yikui, Zhou Linglin, Wang Jie, Wang Zhong Lin
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Small. 2022 Jun;18(24):e2201402. doi: 10.1002/smll.202201402. Epub 2022 May 12.
As an emerging energy-harvesting technology, the triboelectric nanogenerator (TENG) is considered a powerful driving force toward the new-era of Internet of Things and artificial intelligence, but its output performance is dramatically influenced by environmental humidity. Herein, a direct current TENG (DC-TENG) based on the triboelectrification effect and electrostatic breakdown is reported to address the problem of output attenuation in high humidity environments for the conventional TENGs. It is found that high humidity not only enhances the sliding triboelectrification effect of hydrophobic triboelectric materials, but also promotes the electrostatic breakdown process for DC-TENG, thus contributing to the improvement of DC-TENG output. Furthermore, taking poly(vinyl chloride) film as the friction layer, the effective surface charge density of DC-TENG with microstructure-designed electrode achieves a milestone value of ≈2.97 mC m under 90% relative humidity, which is almost 1.42-fold larger than that under 30% RH. This work not only establishes an effective methodology to boost the output performance of TENG in a high humidity environment, but also establishes a foundation for its practical applications in large-scale energy harvesting.
作为一种新兴的能量收集技术，摩擦纳米发电机（TENG）被认为是推动物联网和人工智能新时代的强大驱动力，但其输出性能会受到环境湿度的显著影响。在此，报道了一种基于摩擦起电效应和静电击穿的直流摩擦纳米发电机（DC-TENG），以解决传统TENG在高湿度环境下输出衰减的问题。研究发现，高湿度不仅增强了疏水性摩擦电材料的滑动摩擦起电效应，还促进了DC-TENG的静电击穿过程，从而有助于提高DC-TENG的输出。此外，以聚氯乙烯薄膜为摩擦层，在相对湿度90%的条件下，具有微结构设计电极的DC-TENG的有效表面电荷密度达到了约2.97 mC m的里程碑值，几乎是30%相对湿度下的1.42倍。这项工作不仅建立了一种在高湿度环境下提高TENG输出性能的有效方法，也为其在大规模能量收集的实际应用奠定了基础。
