简介:面向小型可移动电子设备,其携带电池的能量密度成为一个重要技术指标。旨在展望电池技术发展趋势,本文针对各种典型电池(包括锂离子电池、锂空气电池、锂硫电池等)和新型硅-硫电池通过理论计算比较分析了其理论能量密度。研究表明:虽然锂空气电池和锂硫电池具有较大的理论能量密度,但是由于自身固有的树枝状晶体生长和低库伦效率,采用过量锂金属的解决方法极大地降低此类电池的能量密度。对于目前的锂离子电池而言,替换石墨阳极材料为硅材料可以一定程度上提高电池能量密度,理论值可达2100Wh/L。更进一步,基于转换式反应的新型锂化硅-硫电池能够实现更大电池能量密度,约为3000Wh/L,其值是目前商业化锂离子-石墨电池的四倍。因此,此类新型硅-硫电池能够满足未来3年~5年内的可移动电子设备的需求。同时,纳米技术可以从根本上解决此类电池自身粉末化问题,从而为其商业化提供可能。
简介:A5GHzFloatingPointMultiply-Accumulatorin90nmDualV{sub}TCMOS;Ahigheffectivealgorithmof32-bitmultiplyandMACinstructions'VLSIimplementationwith32×8multiplier-accumulatorinDSPapplications;Ahigheffectivealgorithmof32-bitmultiplyandMACinstructions'VLSIimplementationwith32×8multiplier-accumulatorinDSPapplications;AStudyonHydraulicActiveEngineMount;Astudyonthecycleperformanceoflithiumsecondaryhatteriesusinglithiumnickel-cobaltcompositeoxideandgraphite/cokehybridcarbon;ASTUDYONTHEDEGRADATIONMECHANISMOFLi{sub{2.6Co{sub}0.4NASANANODEFORLiSECONDARYBATTERIES;
简介:Acomparisonofenergyuseforadirect-hydrogenhybridversusadirect-hydrogenload-followingfuelcellvehicle,Acompleteco-simulation-baseddesignenvironmentforclectricandhybrid-electricvehicles,fuel-cellsystems,anddrivetrains,ADeclineofFuelCellProductivityinMethanolReformingTypeFuelCellVehicles,Adecompositionstrategybasedonthermoeconomicisolationappliedtotheoptimalsynthesis/designandoperationofafuelcellbasedtotalenergysystem
简介:Aprogrammablemonolithictemperatureloggingdevice;AnEvaluationMethodofLiquidElectrolytesforLithiumBatteriesbytheMultinuclearPulsed-gradientSpin-echoNMR-TheDiffusingRadiiofLithiumIonandAnionsinOrganicSolvents;Analysisofaphasetransitionprocesscontrolledbydiffusion,applicationtolithiuminsertionintoV{sub}2O{sub}5;ApplicationofDibenzo[e,e][1,2]dithiin,Phenanthro[4,5-cde][1,2]dithiinTriphenyieno[1,12-cde][1,2]dithiin,and6,7-Dithiodibenzo[c,e][1,2]dithiinasCathodeActiveMaterialsforLithiumSecondaryBatteries;Applicationtolithiumbatteryelectrolyteoflithiumorganoboratewithsalicylicligand;CharacteristicsofInterpenetratedPolymerNetworkSystemmadeofPolyethyleneOxide-LiBF{sub}4ComplexandPolystyreneastheElectrolyteforLithiumSecondaryBattery;
简介:ANADVANCEDSOLARTHERMALELECTRICSYSTEMWITHPHASECHANGESTEAMACCUMULATORANDCPCCOLLECTOR,ANALTERNATIVEDESIGNOFMICROCONTROLLER-BASEDCHARGECONTROLLERFORSTAND-ALONEPHOTOVOLTAICSYSTEMS,Applicationofaheathydraulicacctunulatortothermalstabilizationoftheevaporationzoneofaheatpipe,BeamLossControlontheESSAccumulatorRings