محدثه سلماني

Laser-induced graphene (LIG) has attracted wide attention as a direct an‎d cost-effective method for producing graphene. Two common substrates for laser-induced graphene are graphene oxide an‎d carbon-rich materials such as polyimides. Although LIG is predominantly performed with infrared lasers, ultraviolet an‎d visible lasers are also commonly used for this purpose. In this study, LIG on a polyimide substrate was achieved using a visible diode (narrow-ban‎d) laser, an‎d the process was optimized for the fabrication of flexible supercapacitor electrodes with improved electrical conductivity, structure, an‎d performance. LIG on a polyimide substrate using a visible diode laser was successfully realized, yielding electrodes with resistances in the range of 10 Ω to 130 Ω. The optimized electrode’s structure an‎d morphology, in terms of electrical conductivity, crystal size, an‎d porosity, were examined by X-ray diffraction an‎d scanning electron microscopy. The electrode was selec‎ted as optimal for eva‎luating performance in an electrochemical cell using voltammetric cycling, electrochemical impedance spectroscopy, an‎d galvanostatic discharge tests. The results indicate reversible capacitive–resistive behavior.

القاي ليزري گرتفن , ليزر مرئي , الكترود ابرخازن , بهينه سازي

Laser induced graphene , visible laser , supercapacitor

Mohaddetheh Salmani

Mohammadreza Jafarfard- Hedieh Pazokian