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Foryears,theautomobileindustryhasbeentestingvehiclesthatusehydrogenasfuel.Now,peopleacrosstheUnitedStateshavehadachancetoseeandevendrivecarsthatgetpowerfromhydrogenfuelcells(燃料电池).Butthehydrogenfue
更新时间: 2025-08-28 12:54:33
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MoreModelsofHydrogenCarsBeingTested

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  小题1:Invented小题1:differently小题1:meets小题1:separated小题1:forced小题1:formed小题1:development小题1:unsolved小题1:low小题1:Replacing小题1:原词重现:从文章的句子:Thefuelcellwasfi...
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Foryears,theautomobileindustryhasbeentestingvehiclesthatusehydrogenasfuel.Now,peopleacrosstheUnitedStateshavehadachancetoseeandevendrivecarsthatgetpowerfromhydrogenfuelcells(燃料电池).

Butthehydrogenfuelcellisnotanewidea.ThefuelcellwasfirstinventedbySirWilliamGroveofBritainin1839.Sincethen,manydifferentdesigns,havebeeninvented.Thereisoneplacewherefuelcellsareaproventechnology:inspace.TheAmericanspaceagencyusedfuelcellsinitsApollospaceshipsinthetwentiethcentury.

ThemostusefulfuelcellfortransportationpurposesisthePolymerElectrolyteMembrane,orP.E.M.fuelcell.ItissimpleandcanoperateattemperaturesofsixtytoeightydegreesCelsius.Thatismuchlowerthanotherfuelcelldesigns.AP.E.M.fuelcellhastwosidesdividedbyathinmembrane(膜).Hydrogengasisforcedthroughonesidewhereitcomesincontactwithareactivematerialcontainingthemetalplatinum(铂).Themembraneseparatestheelectrons(电子)fromtheprotons(质子)inthehydrogenatoms.Theprotonspassthroughittotheothersideofthefuelcell.Buttheelectronsarecapturedtodowork;likepoweringamotor.Oxygenfromtheairisforcedintotheothersideofthefuelcell.There,thegasmeetstheprotonsthathavepassedthroughthemembrane.Theycombinetoformwaterandheat.Asinglefuelcelldoesnotproducealotofelectricity.Butwhenmanyfuelcellsarecombined,theycanproduceenoughelectricitytopoweravehicle.Theproductofthechemicalreactionthatpowersfuelcellsiswater.Thismakesfuelcellsaverycleantechnology.

Hydrogenfuelcellcarshavebeenslowtodevelopbecauseofmanytechnicalproblemsthathavetobesolved.Forexample,itisunclearhowlongthemembranesinP.E.M.fuelcellswilllast.Also,fuelcellsneedwaterfortheirchemicalreactions.Theymustbedesignedtostarteasilyatlowtemperaturesandindryclimates.Andsmaller,lesscostlyfuelcellsmustbedesignedbeforetheycantrulytaketheplaceofgasolineengines.Nowmoremodelsoffuelcellvehiclesarebeingtestedthaneverbefore.Thethreatofclimatechangeandthehighcostofoilhaveincreasedinterestinthesevehiclesthatdonotcausepollution.