writer：王海
keywords：Lithium-ion， Titanium，dioxide Mesoporous structure，Electrochemical
source：期刊
specific source：Chemical Engineering Journal
Issue time：2013年
Hierarchically porousollowiO2icrospheresomposedf interconnect nanocrystalsaveeenynthesizedyne-potydrothermalethod withouturtherhermalnnealing.hes-preparedaterialsreharacterizedy X-ray diffraction (XRD),ield emissioncanning electronicroscopy (FESEM),ransmission electronicroscopy (TEM)nd electrochemicaleasurements.ESEMhowshatheesultantierarchicalesoporousiO2ollowicrospheres (HTMs)omprisedesoporoushells with interconnectednatase nanocrystals.EMevealshathe interconnectedtructurefollowicrosphereslmostemainednchanged with increasingydrothermaleactionime.he electrochemicaleasurementsesultshowedhathe initial Li insertion/extractionapacityfhe electrodesbtainedt 180 °Cor 15 is 158A g~(-1)nd 151A g~(-1)t 5,espectively.oreover, inhe 100thycle,heeversibleapacitytillemainsbout 131A g~(-1) indicating excellentyclingtabilitynd goodigh-rate performance.he electrochemical impedancepectroscopyeasurements indicatedhatheurfaceeaction kineticsfiO2 nanocrystals were improvedignificantly, whichayettributedoasthargeransfer inhe interconnectediO2 nanocrystalstr