The triboelectric nanogenerator (TENG) technology is rapidly becoming a promising candidate for harvesting wave energy from the ocean. In this paper, through an in-depth analysis of the working principle of spherical TENGs, for the first time, a dynamic model of this structure is proposed based on a cylinder-cylindrical shell configuration, and integrated into TENGs electric model. We verified the assumption that the motion of internal ball of the spherical TENGs is a small oscillation by comparing the V-Q-x relationship with experiments. The model reveals the influence of structural/material parameters, such as the radius of inner ball, density of material, and thickness of the shell on the energy output of TENGs. The results show that the change of the radius of the inner ball plays the dominant role on the power output with the other two parameters affecting the power output level of the TENG to varying degrees. These structural/material parameters can be combined to optimize and increase the output performance of spherical TENGs.

摩擦电纳米发电机（TENG）技术正迅速成为从海洋中收集波能的有前途的候选人。本文通过对球面TENGs工作原理的深入分析，首次提出了基于圆柱-圆柱壳结构的这种结构的动力学模型，并将其集成到TENGs电学模型中。通过将VQx关系与实验进行比较，我们验证了球形TENG的内部球运动是小的振荡的假设。该模型揭示了结构/材料参数（例如内球的半径，材料的密度和壳体的厚度）对TENGs能量输出的影响。结果表明，内球半径的变化在功率输出中起主要作用，其他两个参数在不同程度上影响着TENG的功率输出水平。这些结构/材料参数可以组合起来以优化和提高球形TENG的输出性能。