ZIF-derived carbon structures are considered as desired electrode materials for supercapacitors due to their high surface area,high conductivity,and porous structure.However,the most reported ratio of 2-methylimidazole and Zn(Ⅱ) is 4∶1 to 20∶1,which limits commercial applications due to the increasing cost.In this paper,a multirole Zn(Ⅱ)-assisted method is presented from Zn(Ⅱ) solution,ZnO,ZnO/ZIF-8 core-shell nanostructure,to 3D hierarchical micro-meso-macroporous carbon structures with a 1∶1 ratio of 2-methylimidazole and Zn(Ⅱ).The hierarchically porous carbon has a high surface area of 1800 m2 g-1 due to the synergistic effect of multirole Zn(Ⅱ).The unique carbon-based half-cell delivers the specific capacitances of 377 and 221 F g-1 at the current densities of 1.0 and 50 A g-1,respectively.As a 2.5 V symmetrical supercapacitor,the device reveals a high double-layer capacitance of 24.4 F g-1,a power density of 62.5 kW kg-1,and more than 85.8％ capacitance can be retained over 10000 cycles at 10 A g-1.More importantly,the low-cost hierarchically porous carbon could be easily produced on a large scale and almost all chemicals can be reused in the sustainable method.