showed a competitive energy density of 74.9 W h Kg -1 , and a high-potential durability of 87.8%, and the cell decayed by only about 12.2% with retention of 94.2% coulombic efficiency over 100000 cycles at 2 A g -1 . The fabricated electrode with advantageous power outputs, and prominent cycle stabilities are highly attributed to the high adsorbic SBET, hierarchical porous texture, and doping of N/O into carbon matrix, and the surface affinity toward electrolyte solution, along with the faradaic-active functionalities stem from heteroatoms.