Cationic vacancies and interface engineering on crystalline–amorphous gamma-phase Ni–Co oxyhydroxides achieve ultrahigh mass/areal/volumetric energy density flexible all-solid-state asymmetric supercapacitor

Novel gamma-phase Ni–Co oxyhydroxides nanoplate networks with cationic vacancy defects and crystalline–amorphous interfaces achieve ultrahigh mass/areal/volumetric energy-density flexible all-solid-state asymmetric supercapacitor.