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A room-temperature thermal substrate process, induction heating deposition was introduced to fabricate a layer of porous nickel-based compounds on nickel foam as supercapacitor electrode materials. The as-prepared film was composed of sheet-like NiO, Ni2O3, NiOOH and 3Ni(OH)2·2H2O (α-Ni(OH)2). It possessed a hierarchical 3D-interconnected porous nanostructure with reasonable pore size distribution,...
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