ambient energy. TENG is of great interest for capturing low-frequency mechanical energy due to its low cost in fabrication and excellent coupling effect (triboelectric effect and electrostatic induction). Different structures and triboelectric materials of tribo electric nanogenerators (TENGs) have been designed for harvesting mechanical energy of different form, e.g., water wave, wind, vibration, and biomechanical motion energy from the natural environment. [6][7][8][9][10][11][12] Recently, based on the artificial intelligence (AI) technology, autonomous car (driverless, self-driving, robotic) is an innovative vehicle that is capable of sensing its environment and navigating without human input. Driving safety early warning (DSEW) system is very important for in the cruising of autonomous vehicles, and it is a key technology that has been proposed and developing fast in this field. In fact, information cannot be provided without a strong efficient sensor network. TENGs could be harvesting vibrational/slide energy from a moving vehicle, as power sources and self-powered sensors for DSEW system. [13][14][15] However, there are some limitations to the previously different kinds of TENGs. First, the triboelectric materials' supporting surface is easy to be damaged during the contact and the separation, it is unable to support sliding friction for long periods. Second, most organic triboelectric materials 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.
