Harsh‐Environmental‐Resistant Triboelectric Nanogenerator and Its Applications in Autodrive Safety Warning

Abstract Rapid advancements in multifunctional triboelectric nanogenerators (TENGs) for energy harvesting and self‐powered sensing must be partnered with corresponding advances in durability and heat‐resistance, especially under harsh working conditions. A device suitable for harsh environmental applications based on the wear‐resistant triboelectric material is reported. The working modes of the harsh‐environmental TENG (heTENG) are composed of freestanding and single electrode that enable both harvesting sliding/vibration energy and self‐powered vibrational sensing. For the first time, a TENG possessing wear resistance, withstanding high temperature, and high hardness is achieved by employing micro–nanocomposite for triboelectric materials. It is demonstrated to be directly used as a key supporting part, such as automobile's brake pads. In addition, it is found that the heTENG outputs 221 V, 27.9 µA cm −2 , and 33.4 µC cm −2 . Furthermore, since heTENG is vibration‐sensitive, the automobile's self‐powered smart braking system and sensor network are developed successfully which can automatically provide a precise early‐warning signals, such as a reminder for brake replacement, and an indicator for tire overloading, and pressure. This work shows a new strategy to enhance the performance of triboelectric materials, making it applicable to harsh environments, as well as potential applications in autonomous vehicles and industrial brakes.