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The nanostructured MoO2/rGO/Ni foam 3-dimentional electrode for supercapacitor is synthesized via a two-step method.First, the graphene oxide (GO) prepared by Hummers method is electrodeposited on nickel foam and the GO is reduced to reduced-graphene oxide (rGO) at the same time.Then the MoO2 ultrathin nanolayer is grown on the rGO via a typical electrochemical deposition process.