Balanced Kinetics Between Electrodes By Carbon Cloth@Zif-8 For High Rate Performance Zinc-Ion Hybrid Capacitors

Herein, ZIF-8 pre-grown on carbon cloth (CC) leads to preferential and homogenizing Zn deposition to accelerate Zn-ion diffusion. CC with uniform Zn deposits induced from ZIF-8 promotes rapid Zn plating, resulting in balanced kinetics between electrodes. The as-assembled ZICs show a high specific capacitance of 302 F g(-1) at 0.5 A g(-1), an outstanding rate performance of 188 F g(-1) at 20 A g(-1) and 100% capacitance retention after 10000 cycles.