Toward high-performance flexible micro-supercapacitors: in situ construction of 2D porous carbon nanosheets with a unique polycrystalline-like micro-morphological feature

A unique 2D porous carbon nanosheet (PL-PCN) which has a polycrystalline-like micro-morphological feature is synthesized for the first time. The PL-PCN-based MSC exhibits ultrahigh areal capacitance and energy density.