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The advances in micro-size and in-plane supercapacitors lead to produce theminiaturizing energy storage devices in portable and bendable electronics.Micro-supercapacitors have unique electrochemical performance, such as highpower density, fast charging, long cycle life, and high safety. The reductiontime and cost in the fabrication processes of micro-supercapacitors areimportant factors in micro-fabrication technology. In this work, a simple,scalable and cost-effective fabrication of interdigitated reduced grapheneoxide@polyaniline flexible micro-supercapacitors is presented. We found that infabricating the interdigitated microelectrode patterns on PET substrate; thereduction of graphene oxide and growth of conducting polymer are rapidlyperformed simultaneously in one step by laser irradiation. The capacitance was72 mF/cm2 at 0.035mA/cm2 current density. These high capacitancemicro-supercapacitors demonstrate good stability and more than 93.5% of thecapacitance retain after 1000 cycles at 0.7 mA/cm2 current density.

One-step fabrication of flexible, cost/time effective and high energy storage graphene-based supercapacitor