3D N,O-Codoped Egg-Box-Like Carbons with Tuned Channels for High Areal Capacitance Supercapacitors

A green low-cost route without the acid washing step is used to prepare the N,O-codoped egg-box-like carbons. The obtained carbons possess moderate N, O contents and tuned transfer channels with three-dimensional (3D) egg-box-like structures. The fabricated electrode exhibits high areal capacitance and long-term cycle stability.