The article reports a scalable, cost-effective method for producing and patterning porous graphene films from commercial polymer sheets using a CO2 infrared laser. The sp3-carbon atoms in the polymer are converted to sp2-carbon atoms through pulsed laser irradiation, resulting in laser-induced graphene (LIG) with high electrical conductivity. LIG can be patterned into interdigitated electrodes for microsupercapacitors, achieving specific capacitances of >4 mF cm−2 and power densities of ~9 mW cm−2. The enhanced capacitance is attributed to the ultra-polycrystalline lattice structure of pentagon-heptagon defects in LIG. The technique, which involves one-step processing in air, is suitable for roll-to-roll manufacturing and offers a rapid route to polymer-written electronic and energy storage devices. The study also includes detailed characterization of LIG using SEM, Raman spectroscopy, XRD, XPS, and TEM, and theoretical calculations support the enhanced charge storage mechanism.The article reports a scalable, cost-effective method for producing and patterning porous graphene films from commercial polymer sheets using a CO2 infrared laser. The sp3-carbon atoms in the polymer are converted to sp2-carbon atoms through pulsed laser irradiation, resulting in laser-induced graphene (LIG) with high electrical conductivity. LIG can be patterned into interdigitated electrodes for microsupercapacitors, achieving specific capacitances of >4 mF cm−2 and power densities of ~9 mW cm−2. The enhanced capacitance is attributed to the ultra-polycrystalline lattice structure of pentagon-heptagon defects in LIG. The technique, which involves one-step processing in air, is suitable for roll-to-roll manufacturing and offers a rapid route to polymer-written electronic and energy storage devices. The study also includes detailed characterization of LIG using SEM, Raman spectroscopy, XRD, XPS, and TEM, and theoretical calculations support the enhanced charge storage mechanism.