A flexible and stable zinc-ion hybrid capacitor with polysaccharide-reinforced cross-linked hydrogel electrolyte and binder-free carbon cathode

A flexible and stable zinc-ion hybrid capacitor has been fabricated with a polysaccharide-reinforced hydrogel electrolyte and binder-free carbon fabric cathode, and displays an impressive cycling performance with a capacity retention of 93.5% over 10 000 cycles as well as high energy/power density of 113.2 W h kg −1 /15752.4 W kg −1 .