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Binder-free NiO@MnO2 core-shell structure was deposited on Ni foam used as electrode of supercapacitor. The rod-like NiO core was prepared by thermal decomposition of NiC2O4 synthesized by corrosion of Ni foam with oxalic acid under hydrothermal conditions. Sphere-like MnO2 shell was deposited on the surface of NiO core through hydrothermal treatment with KMnO4 solution. The structure, composition,...
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