High‐Performance Electrothermal Film Based on Laser‐Induced Graphene

Herein, flexible and robust heaters are proposed based on laser‐induced graphene (LIG) fabricated photothermally on polyimide (PI) substrates. The heaters are precisely defined by a computer numerical control (CNC) platform‐driven laser diode with a one‐step process. The electrothermal performance of the heaters can be adjusted by tuning the laser driving speed in a certain range under a given input power. The fabricated heater shows a high saturation temperature (270 °C), the fast response time (10 s), and satisfactory convective heat‐transfer coefficient (42 W m −2 °C −1 ). Simultaneously, the developed heaters demonstrate excellent flexibility, robust adhesion, and good long‐time stability. The experimental results pave the way for high‐performance, environmentally friendly, robust, and flexible heaters.