Hierarchical mesoporous NiO nanoarrays with ultrahigh capacitance for aqueous hybrid supercapacitor

Hierarchical mesoporous NiO nanoarrays (NiO-HMNAs) with ultrahigh specific capacitance (3114 F g−1 at the current density of 5 mA cm−2) were prepared by self-generated sacrificial template approach for high-performance aqueous hybrid supercapacitor (67.0 W h kg−1 at 320 W kg−1).291