One-step preparation of ultrathin nitrogen-doped carbon nanosheets with ultrahigh pore volume for high-performance supercapacitors

A facile one-step activation and nitrogen-doping combination method is developed for preparation of nitrogen-doped graphene-like carbon nanosheets (N-CNSs). The N-CNSs have abundant wrinkled structures and ultrahigh pore volume (3.19 cm(3) g(-1)), and are used as high-performance electrode materials for supercapacitors.