▎ 摘　　要

Laser processing of supercapacitor electrodes is a simple, accurate and fast method for planner, binder-free and flexible devices fabrication. In this context, two nanosecond lasers of 355 and 1064 nm were applied to process graphene oxide separately in a single step and successively in subsequent two step. The injection of Ar gas during laser writing enables maximum reduction with a minimal thinning effect. Energy Dispersive X-ray spectroscopy (EDX) measurement showed a high reduction degree and oxygen contents of nearly zero due to high deposited laser power and induced plasma for the 1064 nm laser. Moreover, two step laser writing promoted a highly crystalline layered graphene despite the applied ambient conditions. The electrochemical characterization was applied via 2 and 3-electrodes setup in H2SO4 (1 M) electrolyte, laser-induced graphene (LIG) electrodes ach-ieved 633.3 and 345.5 mF/cm2 at 0.5 and 5 mA/cm2, respectively. Besides, energy and power densities of about 88 mu Wh/cm2 (at 0.5 mA/cm2) and 2500 mu W/cm2 (at 5 mA/cm2), respectively. These values are several orders of magnitudes higher than previous reports of laser-processed crude graphene thanks to nanosecond laser in-teractions. The retention of capacitance was 114 % after 2000 cycles due to H2SO4 electrolyte doping process. In addition, different laser processing interactions and subsequent application impact on electrochemical perfor-mance were studied. LIG samples were examined via scanning electron microscopy, EDX, Raman spectroscopy and x-ray diffraction, Brunauer-Emmett-Teller, high-resolution transmission electron microscope. This LIG's outstanding electrochemical performance will enable near-battery energy values when considering a faradic additive.