Laser‐Induced Electron Synchronization Excitation for Photochemical Synthesis and Patterning Graphene‐Based Electrode

Abstract Micro‐supercapacitors (MSCs) represent a pressing requirement for powering the forthcoming generation of micro‐electronic devices. The simultaneous realization of high‐efficiency synthesis of electrode materials and precision patterning for MSCs in a single step presents an ardent need, yet it poses a formidable challenge. Herein, a unique shaped laser‐induced patterned electron synchronization excitation strategy has been put forward to photochemical synthesis RuO 2 /reduced graphene oxide (rGO) electrode and simultaneously manufacture the micron‐scale high‐performance MSCs with ultra‐high resolution. Significantly, the technique represents a noteworthy advancement over traditional laser direct writing (LDW) patterning and photoinduced synthetic electrode methods. It not only improves the processing efficiency for MSCs and the controllability of laser‐induced electrode material but also enhances electric fields and potentials at the interface for better electrochemical performance. The resultant MSCs exhibit excellent area and volumetric capacitance (516 mF cm −2 and 1720 F cm −3 ), and ultrahigh energy density (0.41 Wh cm −3 ) and well‐cycle stability (retaining 95% capacitance after 12000 cycles). This investigation establishes a novel avenue for electrode design and underscores substantial potential in the fabrication of diverse microelectronic devices.