A safe and robust dual-network hydrogel electrolyte coupled with multi-heteroatom doped carbon nanosheets for flexible quasi-solid-state zinc ion hybrid supercapacitors

A κ-CG/PAAm/Zn(CF 3 SO 3 ) 2 hydrogel electrolyte was constructed, which displays high ionic conductivity and satisfactory mechanical properties. The quasi-solid-state ZHSC based on ACNS and the as-designed hydrogel shows excellent cycling stability and a superior energy density.