Herein, a 1D zinc coordination polymer [Zn(bibp)Cl] () was assembled from the reaction of 4,4'-bis(imidazol-1-yl)-biphenyl (bibp) with ZnCl. Through a calcination-thermolysis strategy, sponge-like highly porous carbon was prepared by employing the coralloid sample of as the precursor. For comparisons, a series of activated carbon () was obtained by the similar heating process on the mixture of bibp with ZnCl at different mass ratios. The results illustrate that the atomically dispersed ZnCl dot in the 1D chain of has an activation effect on the generation of , which can greatly promote the porosity and achieve high-efficiency utilization of ZnCl. Therefore, the atomically dispersed activating agent provides a new method for environmentally friendly production of porous carbon materials. Significantly, the electrode displays specific capacitance of 215 F g in 3 M KOH solution, which will be largely promoted to 1419 F g in the redox active electrolyte of K[Fe(CN)]/KOH. also shows remarkable cycling stability (the capacity retention is 89.0% after 5000 cycles). Moreover, the fabricated symmetric supercapacitor owns a high energy density of 34.8 Wh kg at 785.5 W kg. So, the ∩K[Fe(CN)] system has wide application prospects in supercapacitors.
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