简介：Surface-treatedMmNi3.55Co0.75Mn0.4Al0.3alloyasnegativeelectrodematerialofnickel-metalhydridebatterywasemployedtoimprovethehigh-ratedischargeability.SurfacetreatmentwasrealizedbydippingandstirringthealloyintoaHClaqueoussolutionwithvariousconcentrationsatroomtemperature.ThemicrostructureofthealloybeforeandaftersurfacetreatmentwasanalyzedbyX-raydiffraction(XRD)andscanningelectronmicroscopy(SEM).Theelectrochemicalpropertiesbeforeandaftersurfacetreatmentwerecompared,andthealloytreatedin0.025mol/LHClsolutionshowedtheoptimalhigh-ratedischargeability.

简介：Er/Ybco-dopedborate-silicateglasseswithvariousYbconcentrationswerefabricatedbyhigh-temperaturesolid-reactionmethod.Thephotoluminescencespectraaround1.55μmandthevisibleupconversionspectraweremeasured.TheradiativelifetimeofEr-4I13/2,com-paredwiththemeasuredone,wasobtainedbyJudd-Ofelttheorybasedontheabsorptionspectra.ArateequationmodelforEr/Ybco-dopedsystemhasbeenestablishedbasedonthedataobtainedfromthemeasurements,includingtheabsorptionandemissio...