Pyrolytic Jetting of Highly Porous Laser-Induced Graphene Fiber for Cost-Effective Supercapacitor

Abstract

The recently reported laser pyrolytic jetting process enables facile generation of highly porous, free-standing graphene fiber from polyimide film upon the scanning of tightly focused continuous-wave laser. As a follow-up study, we claim that the corresponding laser pyrolytic jetting process is favorable for the fabrication of relevant energy device applications compared to the conventional LIG process in both energy-saving and material-saving perspectives. Moreover, the volume of the pyrolysis product is substantially increased in the case of pyrolytic jetting compared to conventional LIG, resulting in an extended surface area for storing more electric charges. At the same time, material characterization by Raman measurement validates that the exfoliated product from pyrolytic jetting is analogous to the conventional LIG and therefore suitable for supercapacitor application. As a result, supercapacitor created by the pyrolytic jetting allows substantial enhancement in the capacitance compared to the conventional LIG for both with and without manganese oxide layer coating, proposing the potential of pyrolytic jetting for the efficient fabrication of carbon-based energy devices. © 2023, The Author(s), under exclusive licence to Korean Society for Precision Engineering.