Direct laser writing of graphene films from a polyether ether ketone precursor

摘要: Graphene-based micro-supercapacitors exhibit excellent electrochemical performance that can easily meet the energy storage requirements of micro-electronic products. However, complex preparation and transfer process steps traditional methods limit their wide application. Direct laser writing deposit graphene laser-induced (LIG) onto a specific substrate-patterned electrodes. This approach offers great advantages in miniature complex-patterned electrodes, but currently there is limited choice precursor materials. In this reported study, biocompatible polyether ether ketone (PEEK) was irradiated using high repetition rate picosecond to produce graphene. Various photothermal photochemical reactions were involved one-step conversion PEEK into film comprised several layers (3–4) The testing three-electrode system containing novel showed LIG had capacitance 20.4 mF cm−2 at scan speed 10 mV s−1, reversibly maintained with 89.37% retention initial after 5000 cycles. higher cycle stability has potential for use micro-devices.