▎ 摘　　要

Graphene/manganese oxide nanocomposites are widely used as electrode materials for microsupercapacitor (MSC) owing to their good electrochemical performances. Using graphene oxide/MnSO4 as the precursor, this study proposes a laser direct-writing method for directly processing graphene/MnO-Mn3O4 doped with sulfur nanocomposite electrode for MSC. We study in detail the variation of the valence state of the synthesized manganese oxide with the laser power. The synthesized graphene/MnO-Mn3O4 doped with sulfur has hierarchical porous structure, and MnO-Mn3O4 nanoparticles are evenly distributed on the surface of graphene. Furthermore, the fabricated MSC exhibits good electrochemical performance, presenting an impressive area specific capacitance of 73.25 mF cm(-2). The maximum power and energy density of MSC are 1.29 mW cm(-2) and 14.65 mu Wh cm(-2), respectively. After 5000 cycles, the capacitance of MSC retains about 90%. In addition, MSC exhibits good mechanical flexibility.