Halloysite nanotubes favored facile deposition of nickel disulfide on NiMn oxides nanosheets for high-performance energy storage

One dimensional hierarachical NiS2@Ni-Mn-O nanosheets/halloysite nanotubes was first developed as electrode materials for high-performance supercapacitor. With nanotubular HNT support, the electrode material delivers ultrahigh capacity (1144.7 C g-1 at a current density of 1 A g-1) along with good rate capability and excellent cycling lifespan (92.6% retention after 2000 cycles) in 2 M KOH aqueous electrolyte. The optimal solid-state symmetric device delivers a maximum energy density of 164.2 Wh kg-1 and a maximum power density of 15.1 kW kg-1.288