Triboelectric nanogenerator (TENG) has overwhelming dominance in the exploitation of low-frequency vibration energy, but the sparse pulsed output, material abrasion in contact-mode TENG and output decline in noncontact-mode TENG limit the output power and electrical stability. Herein, we report a rotational intermittent-contact TENG (IC-TENG) that is realized on the basis of a slideable rope-driven rotor to achieve efficient exploitation of low-frequency vibrations. The rope-driven rotor can start to spin and transform low-frequency vibrations to high-speed rotation through a whirligig-like dynamics mechanism without the requirement of any hand operation, which enables frequency-multiplied and high electric output of the IC-TENG. Moreover, owing to the constantly replenished tribo-charges produced by the intermittent sliding contact between the rotator and stator in the rope-driven rotor, the IC-TENG exhibits high electrical stability, whose normalized electric output stabilizes at around 81%, whereas the normalized electric output of noncontact-mode TENG attenuates continuously to 48% over a 10-day span. The frequency-multiplied electric output and superior electrical stability make the IC-TENG a promising technology for harnessing ambient low-frequency vibration energy. This work demonstrates a novel strategy for TENG to achieve high electric output and in the meanwhile long-term stability.

摩擦纳米发电机（TENG）在低频振动能量的利用方面具有压倒性优势，但稀疏的脉冲输出、接触模式 TENG 的材料磨损和非接触模式 TENG 的输出下降限制了输出功率和电稳定性。在此，我们报告了一种基于可滑动绳索驱动转子实现的旋转间歇接触 TENG（IC-TENG），以实现对低频振动的有效利用。绳索驱动的转子可以开始旋转，通过类似旋涡的动力学机制，无需任何手动操作，即可将低频振动转化为高速旋转，从而实现IC-TENG的倍频和高电输出。而且，由于绳索驱动转子中转子和定子之间的间歇滑动接触产生的摩擦电荷不断补充，IC-TENG表现出很高的电气稳定性，其归一化电输出稳定在81%左右，而归一化电输出非接触模式 TENG 在 10 天内持续衰减至 48%。倍频电输出和卓越的电稳定性使 IC-TENG 成为利用环境低频振动能量的有前途的技术。这项工作展示了 TENG 实现高电输出和长期稳定性的新策略。而非接触模式 TENG 的归一化电输出在 10 天内连续衰减至 48%。倍频电输出和卓越的电稳定性使 IC-TENG 成为利用环境低频振动能量的有前途的技术。这项工作展示了 TENG 实现高电输出和长期稳定性的新策略。而非接触模式 TENG 的归一化电输出在 10 天内连续衰减至 48%。倍频电输出和卓越的电稳定性使 IC-TENG 成为利用环境低频振动能量的有前途的技术。这项工作展示了 TENG 实现高电输出和长期稳定性的新策略。