High energy density performance of hydrothermally produced hydrous ruthenium oxide/multiwalled carbon nanotubes composite: Design of an asymmetric supercapacitor with excellent cycle life-中国期刊网

摘要 Hydrousrutheniumoxide（h-RuO2）nanoparticlesanditscompositewithmultiwalledcarbonnanotubes（h-RuO2/MWCNT）weresynthesizedbyasimplehydrothermalmethodandprovedtohavepotentialapplicationashybridsupercapacitormaterial.Theh-RuO2andh-RuO2/MWCNTwerecharacterizedfortheirphysico-chemicalpropertiesbyPXRD,BETsurfacearea,Raman,SEM-EDSandTEMtechniques.Theelectrochemicalperformanceofthematerialswereinvestigated,specificcapacitance（Cs）ofh-RuO2andhRuO2/MWCNTestimatedbytheircyclicvoltammetricstudieswerefoundtobe604and1585F/grespectivelyatascanrateof2mV/sinthepotentialrange0–1.2V.Further,thisvaluewasfoundtobenearlythreetimeshigherthanthatofpureh-RuO2.Anasymmetricsupercapacitor（AS）devicewasfabricatedbyemployingh-RuO2/MWCNTasthepositiveelectrodeandactivatedcarbonasthenegativeelectrode.ThedeviceexhibitedCsof61.8F/gatascanrateof2mV/s.Further,thedeviceshowedexcellentlongtermstabilityfor20,000cycleswith88%capacitanceretentionatahighcurrentdensityof25A/g.

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High energy density performance of hydrothermally produced hydrous ruthenium oxide/multiwalled carbon nanotubes composite: Design of an asymmetric supercapacitor with excellent cycle life

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High energy density performance of hydrothermally produced hydrous ruthenium oxide/multiwalled carbon nanotubes composite: Design of an asymmetric supercapacitor with excellent cycle life

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