“Laser‐Powered Precision at Scale: Revolutionizing Supercapacitor Manufacturing Cost‐Effectively”

ABSTRACT Miniaturized and flexible energy storage systems are critical for next‐generation microelectronics, yet scalable fabrication remains a fundamental challenge. Here, we demonstrate a rapid, ambient‐processable strategy to fabricate flexible micro‐supercapacitors (MSCs) by direct laser‐induced carbonization of Co@ZIF‐based (a combination of ZIF‐8 and ZIF‐67) metal–organic framework (MOF) films deposited on commercial cellulose paper. This substrate‐integrated approach combines a simple vacuum filtration process with CO 2 laser scribing, enabling the in situ formation of porous carbon–metal oxide hybrid electrodes in seconds, without the need for high‐temperature or inert‐atmosphere processing. We show that the morphology and electrochemical performance of the MSCs can be precisely tuned by adjusting the laser scribing parameters, with optimal performance achieved at a scan speed of 650 mm s −1 . The resulting devices exhibit an areal capacitance of 724.86 µF cm −2 , robust cycling stability over 9000 cycles, and dual‐polarity operation. Integration into a low‐voltage, USB‐powered circuit further validates the device's functional applicability. This work introduces a cost‐effective, sustainable, and scalable platform for high‐performance micro‐energy storage, bridging the gap between laboratory‐scale concepts and real‐world implementation.