Ultra-Wide Interlayered W_xMo_2xS_y Alloy Electrode Patterning through High-Precision Controllable Photonic-Synthesis

Ultra-thin 2D materials have great potential as electrodes for micro-supercapacitors (MSCs) because of their facile ion transport channels. Here, a high-precision controllable photonic-synthesis strategy that provided 1 inch wafer-scale ultra-thin film arrays of alloyed W_xMo_2xS_y with sulfur vacancies and expanded interlayer (13.2 Å, twice of 2H MoS₂) is reported. This strategy regulates the nucleation and growth of transition metal dichalcogenides (TMDs) on the picosecond or even femtosecond scale, which induces Mo–W alloying, interlayer expansion, and sulfur loss. Therefore, the diffusion barrier of W_xMo_2xS_y is reduced, with charge transfer and ion diffusion enhancing. The as-prepared symmetric MSCs with the size of 100 × 100 µm² achieve ultrahigh specific capacitance (242.57 mF cm⁻² and 242567.83 F cm⁻³), and energy density (21.56 Wh cm⁻³ with power density of 485.13 W cm³). The established synthesis strategy fits numerous materials, which provides a universal method for the flexible synthesis of electrodes in microenergy devices.