Dynamic Thermostable Cellulosic Triboelectric Materials from Multilevel‐Non‐Covalent Interactions

Abstract Triboelectric materials present great potential for harvesting huge amounts of dispersed energy, and converting them directly into useful electricity, a process that generates power more sustainably. Triboelectric nanogenerators (TENGs) have emerged as a technology to power electronics and sensors, and it is expected to solve the problem of energy harvesting and self‐powered sensing from extreme environments. In this paper, a high‐temperature‐resistant triboelectric material is designed based on multilevel non‐covalent bonding interactions, which achieves an ultra‐high surface charge density of 192 µC m−2 at high temperatures. TENGs based on the triboelectric material exhibit more than an order of magnitude higher power output (2750 mW m−2 at 200 °C) than the existing devices at high temperatures. These remarkable properties are achieved based on enthalpy‐driven molecular assembly in highly unbonded states. Thus, the material maintains bond strength and ultra‐high surface charge density in entropy‐dominated high‐temperature environments. This molecular design concept points out a promising direction for the preparation of polymers with excellent triboelectric properties.