Qi Youchao, Liu Guoxu, Bu Tianzhao, Zeng Jianhua, Zhang Zhi, Zhang Chi
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China.
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China.
Small. 2022 Aug;18(31):e2201754. doi: 10.1002/smll.202201754. Epub 2022 Jul 5.
An encouraging micro-energy harvesting technology, the triboelectric nanogenerator (TENG), has been proven to transfer ambient environmental micro-energy into electricity, but a low surface charge density results in low performance and limits the practical application of TENG. Here, a ferromagnetic-based charge-accumulation TENG (FC-TENG) is proposed with ultrahigh surface charge density and performances. The FC-TENG introduces a ferromagnetic media to enhance the output charge by magnetization effect. Meanwhile, the charge can also be continuously accumulated by the charge pump effects. Based on these two effects, an ultra-high surface charge density of 2.85 mC m is obtained under ambient atmospheric conditions using an ultra-thin PET film (3 µm) and deposited Permalloy ferromagnetic electrodes. Meanwhile, the surface charge density of the FC-TENG can always maintain more than 1.5 mC m , even if the relative humidity arrives at 90%. This work provides a prospective technical mode to enhance the surface charge density of TENG, which would shed a new insight and guidance on the high-performance TENG for various environmental conditions such as the ocean, industrial manufacturing, aerospace, and rail traffic.
摩擦电纳米发电机（TENG）作为一种令人鼓舞的微能量收集技术，已被证明能够将周围环境中的微能量转化为电能，但其低表面电荷密度导致性能不佳，并限制了TENG的实际应用。在此，提出了一种基于铁磁的电荷累积TENG（FC-TENG），其具有超高的表面电荷密度和性能。FC-TENG引入铁磁介质以通过磁化效应增强输出电荷。同时，电荷还可通过电荷泵效应持续累积。基于这两种效应，使用超薄PET薄膜（3 µm）和沉积的坡莫合金铁磁电极，在环境大气条件下可获得2.85 mC m的超高表面电荷密度。此外，即使相对湿度达到90%，FC-TENG的表面电荷密度也总能保持在1.5 mC m以上。这项工作提供了一种提升TENG表面电荷密度的前瞻性技术模式，将为适用于海洋、工业制造、航空航天和轨道交通等各种环境条件的高性能TENG带来新的见解和指导。
