Hierarchical 3D structured nanoporous Co9S8@Nix:Moy–Se core–shell nanowire array electrodes for high-performance asymmetric supercapacitors

Hierarchical 3D Co 9 S 8 @Ni x :Mo y –Se core–shell nanowire array electrodes as high-performance positive electrodes, and fabrication of a high energy density asymmetric supercapacitor device.