NiMoO4-GO

2.ExperimentalSection2.1SynthesisofNiMoO4@GOGOwassynthesizedbyaimprovedHummersmethod24,25.NiMoO4@GOnanocompositesweresynthesizedthroughasimplesolid-statechemicalreactionmethod.InatypicalsynthesisforNiMoO4@GOwasasfollows:Thegraphaneoxide(GO)wasdispersedinacertainvolumnofethanolwithcontinuousgranding,untilethanolvolatilizationcompletely.Then,Nickelnitratehexahydrate(Ni(NO3)2·6H2O,AR,99%)andsodiummolybdatedehydrate(NaMoO4·2H2O,AR,99%)withamolarratioof1:1weremixedbygrindingforanhourinagatemortaratroomtemperature.Fig.S3Cyclestabilityofα-NiMoO4nanomaterials:2000chargeanddischargecyclesataconstantcurrentdensityof10Ag-1