摩擦纳米发电机表面电荷密度研究进展

 纳米摩擦发电机可以收集环境中不同形式的机械能，在自驱动系统、物联网和蓝色能源等方面具有巨大的潜在应用价值。作为能量器件，纳米摩擦发电机的实际应用在于进一步提高功率输出，其核心在于提高摩擦电荷密度。介绍了提高摩擦表面电荷密度的技术方法，综述了提高摩擦纳米发电机电荷密度的研究进展。同时，以接触-分离模式的摩擦纳米发电机为例，探索了摩擦表面电荷密度的影响因素和改进措施，以为实现摩擦纳米发电机超高电荷密度提供新的研究方向。

Advance of study on surface charge density of triboelectric nanogenerators

As a promising technology to harvest different forms of mechanical energy from environment, triboelectric nanogenerators (TENGs) have great potential application in self-powered sensor, Internet of Things, and large-scale renewable blue energy. For application it is important to further enhance the output power density and efficiency, which depend on the triboelectric charge density quadratically. In this paper, we briefly introduce the approach to improve the charge density and review the progress of achieving ultrahigh triboelectric charge density. In addition, the restricting factors and limitation of triboelectric charge density are investigated by taking Cu-PTFE as the contact surface of TENG as an example, which could provide a research direction for achieving ultra-high charge density of TENG.