A hierarchical NiO/NiMn-layered double hydroxide nanosheet array on Ni foam for high performance supercapacitors

Abstract
A hierarchical NiO/NiMn-LDH nanosheet array on Ni foam was preparedviaa facile two-step approach and exhibited a high specific capacitance (937 F g−1at 0.5 A g−1) and good cycling stability (91% retention after 1000 cycles at 5 A g−1).