Low‐frequency vibration energy is abundant in nature, but traditional power generation technologies cannot utilize it efficiently. Triboelectric nanogenerators (TENGs), featuring a lightweight structure, high low‐frequency vibration energy conversion efficiency, and controllable cost, have emerged as an ideal solution for harvesting low‐frequency mechanical energy. In this study, a dual‐mode TENG (DM‐TENG) on the basis of laser‐induced graphene (LIG) electrodes is proposed, integrating contact‐separation and freestanding‐layer working modes to efficiently harvest low‐frequency mechanical energy. Experiments' results show that the device can achieve an optimal output voltage of 35 V and a current of 81 µA, with a maximum peak power of 26.45 μW under an external load of 20 MΩ. The proposed DM‐TENG has successfully powered LED lights and small temperature‐humidity meters. This research provides a structural design reference and performance optimization basis for the development of low‐cost, large‐scale low‐frequency vibration energy harvesting systems.
Zhai et al. (Tue,) studied this question.