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1、自制氢燃料电池Buildahydrogenfuelcell.ClickonimageforalargerpictureAfuelcellisadevicethatconvertsafuelsuchashydrogen,alcohol,gasoline,ormethaneintoelectricitydirectly.Ahydrogenfuelcellproduceselectricitywithoutanypollution,sincepurewateristheonlybyproduct.Hydrogenfuelcellsareusedinspacecraf
2、tandotherhigh-techapplicationswhereaclean,efficientpowersourceisneeded.Youcanmakeahydrogenfuelcellinyourkitcheninabout10minutes,anddemonstratehowhydrogenandoxygencancombinetoproducecleanelectricalpower.ClickonimageforalargerpictureTomakethefuelcell,weneedthefollowing:·Onefootofplati
3、numcoatednickelwire,orpureplatinumwire.Sincethisisnotacommonhouseholditem,wecarryplatinumcoatednickelwireinourcatalog.·Apopsiclestickorsimilarsmallpieceofwoodorplastic.·A9voltbatteryclip.·A9voltbattery.·Sometransparentstickytape.·Aglassofwater.·Avoltmeter.Thefirststepistocuttheplati
4、numcoatedwireintotwosixinchlongpieces,andwindeachpieceintoalittlecoiledspringthatwillbetheelectrodesinourfuelcell.Iwoundmineontheendofthetestleadofmyvoltmeter,butanail,anicepick,oracoathangerwilldonicelyasacoilform.ClickonimageforalargerpictureNext,wecuttheleadsofthebatteryclipinhal
5、fandstriptheinsulationoffofthecutends.Thenwetwistthebarebatteryleadwiresontotheendsoftheplatinumcoatedelectrodes,asshowninthephoto.Thebatteryclipwillbeattachedtotheelectrodes,andtwowireswillalsobeattachedtotheelectrodes,andwilllaterbeusedtoconnecttothevoltmeter.Clickonimageforalarge
6、rpictureTheelectrodesarethentapedsecurelytothepopsiclestick.Last,thepopsiclestickistapedsecurelytotheglassofwater,sothattheelectrodesdangleinthewaterfornearlytheirentirelength.Thetwistedwireconnectionsmuststayoutofthewater,soonlytheplatinumcoatedelectrodesareinthewater.Nowconnectthe
7、redwiretothepositiveterminalofthevoltmeter,andtheblackwiretothenegative(or"common")terminalofthevoltmeter.Thevoltmetershouldread0voltsatthispoint,althoughatinyamountofvoltagemayshowup,suchas0.01volts.ClickonimageforalargerpictureYourfuelcellisnowcomplete.Tooperatethefuelcell,weneedt
8、ocausebubblesofhydr
