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1.
1 INTRODUCTIONMagnetohydrodynamics(MHD )playsanimportantroleincellperformance[1] .Inrecentyears ,notonlyinthenewcelldesigningbutalsoinincreasingamperageinexistinglines ,moreattentionshavebeenpaidonthestudyofMHD[2 ] .Twoapproacheshavebeenusedforde terminingtheM…  相似文献   

2.
1 INTRODUCTIONInrecentyears ,theNi metalhydride (Ni MH )batteryhasgraduallyandsteadilyreplacedtheNi Cdbatteryandholdsalargeshareinthesecondarybat terymarket[1~ 3 ] .However ,itsrivalssuchastheLi ionsecondarybatteryarechallengingthestatusoftheNi MHbattery[4 ] .Futu…  相似文献   

3.
1 INTRODUCTIONInrecent years,nickel metalhydridebatteriesarebecoming popularitywithdeveloping portablecomputer,cellularphoneandsoon .Ni/MHbatterieshavealotofadvantagesoverotheradvancedbatterysystemsbecauseoftheirhighenergydensity ,highchargeanddischargeabi…  相似文献   

4.
1 INTRODUCTIONDuringthelastdecade ,thedemandforthenickel/metal hydride (Ni/MH )secondarybatterieshasbeengrowingrapidlybecauseoftheirhighenergydensity ,highHRD ,longcharge dischargecyclelifeandfriendlyenvi ronmentalproperties[14 ] .Hydrogenstoragealloys ,astheneg…  相似文献   

5.
1 INTRODUCTIONNickel metalhydride (Ni/MH )batterieshavebeendevelopedtomeetthedemandsforapowersourcewithhighenergydensity ,excellenthigh ratecapability ,longcyclelifeand goodenvironmentalcompatibility[1,2 ] ,andextensiveresearcheshavebeendoneonthem[3~ 5] .Theperfor…  相似文献   

6.
Electrode characteristics of non-stoichiometric Ml(NiMnAlFe)_x alloys   总被引:4,自引:3,他引:1  
1 INTRODUCTIONMischmetalbasedAB5 typeMm (NiCoMnAl) 5alloysarenowwidelyusedasthenegativeelectrodematerialsofNi/MHbatteries.Amongtheelementsofthealloys,Cohasbeenbelievedtohavetheeffectofloweringthevolumeexpansionofthecompoundonhydrogenation[1 ] andpreventingth…  相似文献   

7.
1INTRODUCTIONNi/MHrechargeablebateriesusinghydrogenstoragealoyshavereceivedgreatatentionbecauseofhighcapacity,noCdcontaminat...  相似文献   

8.
1INTRODUCTIONNickelmetalhydride(Ni/MH)bateriesemployingahydrogenstoragealoyasthenegativematerialhaveatractedmuchatentionbe?..  相似文献   

9.
INTRODUCTIONNickelhydroxideelectrodeshavebeenwidelyusedaspositiveelectrodeinNiCd,NiH2andNiMHsecondarybateries.Improvement...  相似文献   

10.
1 INTRODUCTIONNickelmetalhydride(Ni/MH)batterieshaveattractedmuchattentionbecausetheyhavehigherenergydensityandenvironmentaladvantagecomparedwithNi/Cdbatteries.ManymulticomponentAB5typehydrogenstoragealloyshavebeendevelopedtoimproveperformancesof…  相似文献   

11.
1 INTRODUCTIONTheAB2typeZrbasedLavesphasehydrogenstoragealloyshavebeenstudiedextensivelyduetotheirhighcapacity,longcyclelifetimeandthepotentialtobecomeapromisingcandidateforAB5typealloysinNiMHbatteries[1,2].UnlikethecommonAB5typehydrogenstorag…  相似文献   

12.
THERMODYNAMICSOFTHERMALDECOMPOSITIONOFALUMINUMHYDROXIDE①ZengWenming,ChenNianyiShanghaiInstituteofMetalurgy,ChineseAcademyofSc...  相似文献   

13.
1IntroductionThelongcyclelifeoftherechargeableNiMH(MH=metalhydride)batteryisoneofthemainrequirementsforpracticalapplicati...  相似文献   

14.
Kinetic mechanism of anodic oxidation of tantalum in nitrate melts   总被引:3,自引:0,他引:3  
1 INTRODUCTIONTantalumcanbeoxidizedatlowtemperaturein toinactiveTa2 O5 withcompacttextureandspecificresistanceof 1 0 18Ω·cm[1],whichentitlestantalumgoodcorrosionresistanceandelectricresistance ,andalsomakesitimpossibletogetthickTa2 O5 filmsatlowtemperature .Theo…  相似文献   

15.
Emission mechanism of Mo-Y_2O_3 cathode   总被引:6,自引:3,他引:3  
1 INTRODUCTIONMo Y2 O3isanewkindofrareearth molybde numthermioniccathodematerials[1].ItisexpectedtosubstituteradioactiveW ThO2 cathodematerialsinthefuture .Sincethemiddleof 1 970s,peoplehavemainlydoneresearchononekindofrareearth molyb denumcathode—Mo La2 O3cathode[…  相似文献   

16.
Chemical stability of La_2O_3 in La_2O_3-Mo cathode materials   总被引:1,自引:0,他引:1  
1 INTRODUCTIONThO2 Wthermioniccathodesarestillwidelyusedinhigh powervacuumtubesforindustrialheat ing .ItiswellknownthattheradioactivityofThO2leadsproblemstoitsmanufactureandapplication .La2 O3 Mo ,oneoftheattractivealternatives,wasin ventedinthemidstof 1970s[1~ …  相似文献   

17.
1 INTRODUCTIONTibasedIrO2 coatinganodeswerewildlyusedinelectrochemicalindustryfortheirhighelectrocatalyticactivityandstability[1] .Inanextremecondition ,suchashigh speedelectrodeposition ,however ,thestabilityofIrO2 isnolongersatisfied .Therefore ,themodificat…  相似文献   

18.
1 COLLECTORLESSFLOTATION1.1 NaturalfloatabilityTheinherenthydrophobicityoncethoughttobetypicalofsulfides[1] isnowthoughttoberestrictedtosulfidessuchasmolybdeniteandothermineralsorcompoundwithspecialstructuralfeatures .Mineralssuchasmolybdenite ,orpiment ,re…  相似文献   

19.
1 INTRODUCTIONThestudyofmoltenstructureofCaO SiO2 ,whichactasthebasicfactorinfluencingthephysicalandchemicalpropertiesofthesilicat  相似文献   

20.
1 INTRODUCTIONSinceOvshinskyetal[1]reportedforthefirsttimethatazero resistancestateat 1 55KwasobservedinF dopedYBaCuOsystem ,theeffectofF dopingonsuperconducting propertieshasstimulatedmanyscientiststofurtherefforts.Butvariousconflictingresultswerereportedon…  相似文献   

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