Wang Ning, Wang Xiao-Xiong, Yan Kang, Song Weizhi, Fan Zhiyong, Yu Miao, Long Yun-Ze
Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
Department of Electronic & Computer Engineering, The Hong Kong University of Science & Technology, Kowloon, Hong Kong, China.
ACS Appl Mater Interfaces. 2020 Oct 14;12(41):46205-46211. doi: 10.1021/acsami.0c13938. Epub 2020 Sep 30.
As a new type of energy harvesting and conversion device, nanogenerator can collect various energies from daily life environment and convert it into electrical energy; it has great flexibility and can provide power for small independent systems. The triboelectric nanogenerator (TENG) is widely concerned because of their high output energy density. However, in the case of an open circuit, there will be static charge accumulation on the friction surface. The high voltage generated by the accumulation of charge on the surface will bring the risk of electrostatic discharge (ESD) to nearby circuits. To solve this problem, we have used the ordered polymer nanofibers obtained by electrospinning technology to form an anisotropic triboelectric nanogenerator with better tensile properties and mechanical strength than disordered electrospinning TENG. By adjusting the effective contact area, the voltage output in the longitudinal direction is one order of magnitude higher than the voltage output in the lateral direction. When not in use, the nanogenerator can be rotated 90°, so static charge accumulation and circuit burnout can be avoided, providing an easy method of preventing ESD in a wearable environment.
作为一种新型的能量收集与转换装置，纳米发电机能够从日常生活环境中收集各种能量并将其转化为电能；它具有极大的柔韧性，可为小型独立系统供电。摩擦电纳米发电机（TENG）因其高输出能量密度而受到广泛关注。然而，在开路情况下，摩擦表面会有静电荷积累。表面电荷积累产生的高电压会给附近电路带来静电放电（ESD）风险。为解决这一问题，我们利用静电纺丝技术制备的有序聚合物纳米纤维形成了一种各向异性摩擦电纳米发电机，其拉伸性能和机械强度优于无序静电纺丝的TENG。通过调整有效接触面积，纵向电压输出比横向电压输出高一个数量级。在不使用时，纳米发电机可旋转90°，从而避免静电荷积累和电路烧毁，为可穿戴环境中防止ESD提供了一种简便方法。
