Self‐Healable Triboelectric Nanogenerators: Marriage between Self‐Healing Polymer Chemistry and Triboelectric Devices

Abstract Based on the triboelectrification and electrostatic induction coupling, triboelectric nanogenerators (TENGs) can convert mechanical energy into electrical energy, showing a promising potential in the fields of micro/nano energy and self‐powered sensors applications. However, the devices are prone to malfunction due to fatigue and damage, limiting their development and applications. In this review, according to the working modes and operational malfunctions as well as the possible solutions, it is proposed that a robust TENG device can be constructed from three perspectives: self‐healing friction layers, self‐healing electrodes, and self‐healing whole devices. Based on the structure, suitable environment, and self‐healing materials, the design ideas and fabrication approaches of self‐healing TENGs in recent years are summarized in detail. Finally, the development of self‐healing TENGs in energy harvesting and self‐powered sensors is outlined. It is the wish to provide insights and guidance for the application design of self‐healing TENGs in the future.