Graphite roj teeb feltua lub luag haujlwm tseem ceeb hauv cov thev naus laus zis roj teeb niaj hnub no, tshwj xeeb tshaj yog hauv cov roj teeb ntws thiab cov roj teeb roj. Raws li cov khoom siv zoo thiab ruaj khov, graphite felt muab kev ua hluav taws xob zoo heev thiab kev ruaj khov thermal, thaum tseem pab txhawb kev ua haujlwm ntawm lub roj teeb, lub neej ntev, thiab kev nyab xeeb zoo dua. Hauv kev siv cov roj teeb ntws thiab cov roj teeb roj, cov khoom tshwj xeeb ntawm cov roj teeb graphite felt ua rau nws yog ib qho tseem ceeb hauv cov txheej txheem khaws cia hluav taws xob zoo no.
Daim Ntawv Thov ntawm Graphite Roj Teeb Felt hauv Cov Roj Teeb Ntws
Cov roj teeb ntws, tshwj xeeb tshaj yog cov roj teeb vanadium redox flow (VRFB) thiab cov roj teeb zinc-bromine flow, tau tshawb fawb dav dav thiab siv rau hauv cov thev naus laus zis khaws cia lub zog. Lawv khaws cia thiab tso tawm lub zog los ntawm cov tshuaj nquag yaj hauv electrolyte, uas ua rau lawv muaj lub neej ntev dua thiab muaj peev xwm khaws cia lub zog loj dua piv rau cov roj teeb ib txwm muaj. Hauv kev tsim cov roj teeb no, cov roj teeb graphite felt feem ntau yog siv rau hauv cov khoom electrode, tshwj xeeb tshaj yog qhov twg cov electrolyte ntws cuam tshuam nrog cov khoom siv electrode.
Qhov kev ua tau zoo ntawm graphite felt yog qhov zoo tshaj plaws hauv nws daim ntawv thov hauv cov roj teeb ntws. Hauv cov roj teeb ntws, cov tshuaj tiv thaiv electrochemical tshwm sim ntawm electrolyte thiab cov electrodes, yog li qhov kev ua tau zoo ntawm cov electrodes yog qhov tseem ceeb rau lub roj teeb kev ua tau zoo. Raws li cov khoom siv electrode, graphite felt tuaj yeem txhawb kev txav mus los ntawm cov ions hauv electrolyte thiab xyuas kom meej tias muaj kev hloov pauv hluav taws xob zoo, uas txhim kho lub roj teeb lub zog them thiab tso tawm.
Tsis tas li ntawd xwb, cov ntaub graphite ua lub luag haujlwm tseem ceeb hauv kev tswj cua sov hauv cov roj teeb ntws. Thaum lub sijhawm ua haujlwm ntawm cov roj teeb ntws, cua sov sab hauv raug tsim tawm. Qhov ua tau zoo heev ntawm cov ntaub graphite pab tshem tawm qhov cua sov no, tiv thaiv lub roj teeb kom tsis txhob kub dhau thiab ua kom nws ua haujlwm hauv qhov kub zoo tshaj plaws. Lub peev xwm tswj cua sov no tsis yog tsuas yog pab txuas lub roj teeb lub neej xwb tab sis kuj txhim kho nws txoj kev nyab xeeb, txo qhov kev pheej hmoo ntawm kev ua tsis tiav ntawm lub roj teeb vim kub dhau.
Daim Ntawv Thov ntawm Graphite Battery Felt hauv Cov Roj Hmab
Cov roj teeb yog cov khoom siv uas hloov cov zog tshuaj mus rau hauv lub zog hluav taws xob los ntawm kev siv hluav taws xob, siv dav hauv cov tsheb fais fab, cov khoom siv hluav taws xob thaub qab, thiab cov tshuab hluav taws xob rov ua dua tshiab. Daim ntawv thov ntawm cov roj teeb graphite hauv cov roj teeb feem ntau yog nws lub luag haujlwm ua cov txheej txheem roj diffusion (GDL) thiab cov khoom siv electrode. Nws qhov tseem ceeb yog qhov pom tseeb tshwj xeeb hauv cov roj teeb proton pauv membrane (PEMFC).
Hauv cov roj cell, graphite felt ua haujlwm ua cov txheej roj diffusion (GDL), lub luag haujlwm rau kev faib cov roj reactant xws li hydrogen thiab oxygen mus rau qhov chaw electrode, thaum tseem ua haujlwm ua cov khoom siv hluav taws xob. Vim nws cov conductivity zoo heev, graphite felt tuaj yeem hloov cov electrons tsim tawm hauv lub cell mus rau lub voj voog sab nraud, ua rau muaj zog hluav taws xob. Nws cov qauv porous kuj pab txhawb kev sib kis roj thiab electrolyte conduction, kom ntseeg tau tias cov tshuaj tiv thaiv electrochemical hauv cov roj cell ua haujlwm tau zoo.
Cov graphite uas muaj nyob rau hauv cov roj teeb tsis yog tsuas yog yuav tsum muab cov hluav taws xob zoo xwb, tab sis nws kuj yuav tsum muaj kev tiv thaiv corrosion zoo heev thiab kev ua haujlwm kub siab. Vim tias cov roj teeb ua haujlwm hauv qhov kub siab thiab corrosive ib puag ncig, kev ruaj khov tshuaj lom neeg thiab thermal stability ntawm graphite ua rau nws yog qhov kev xaiv zoo tshaj plaws. Nws tuaj yeem ua haujlwm ruaj khov hauv cov xwm txheej hnyav dhau lub sijhawm ntev, zam kev puas tsuaj ntawm kev ua haujlwm vim yog cov khoom laus lossis corrosion.
Tsis tas li ntawd xwb, cov graphite uas muaj nyob hauv cov roj cell kuj pab ua kom cov tshuaj tiv thaiv ua haujlwm tau zoo dua los ntawm nws cov qauv tsim zoo. Kev npaj thiab txheej txheej ntawm cov graphite fibers tsis yog tsuas yog txhim kho nws lub zog kho tshuab xwb tab sis kuj txhim kho cov roj ntws zoo. Los ntawm kev kho qhov porosity thiab cov qauv ntawm graphite, lub zog tso zis thiab kev ua haujlwm ntawm cov roj cell tuaj yeem txhim kho ntxiv.
Kev Txhim Kho Yav Tom Ntej ntawm Graphite Battery Felt
Raws li cov roj teeb ntws thiab cov roj teeb roj teeb thev naus laus zis txuas ntxiv mus, cov kev cia siab ntawm daim ntawv thov ntawm cov roj teeb graphite xav tau nthuav dav. Cov kws tshawb fawb tab tom tshawb nrhiav txoj hauv kev los txhim kho kev ua tau zoo ntawm cov roj teeb graphite xav tau los ntawm cov khoom sib xyaw graphite, cov txheej txheem doping, thiab kev kho qhov chaw. Piv txwv li, kev txhim kho cov qauv tsim ntawm cov roj teeb graphite xav tau tuaj yeem ua rau nws cov conductivity nce ntxiv, txhim kho nws txoj kev tiv thaiv corrosion, thiab txhim kho cov peev xwm tswj kev kub. Cov kev txhim kho no yuav ua rau kev siv cov roj teeb ntws thiab cov roj teeb roj teeb hauv cov chaw khaws cia hluav taws xob thiab hloov pauv siab.
Xaus lus, kev siv roj teeb graphite uas muaj cov khoom siv hauv cov roj teeb ntws thiab cov roj teeb roj, nrog nws cov kev coj ua zoo heev, kev tswj hwm thermal, thiab kev ruaj khov ntawm cov qauv, tau dhau los ua cov khoom siv tseem ceeb rau cov txheej txheem khaws cia thiab hloov pauv hluav taws xob no. Raws li cov thev naus laus zis hluav taws xob txuas ntxiv txhim kho, roj teeb graphite uas muaj cov khoom siv yuav ua lub luag haujlwm tseem ceeb hauv kev tsav tsheb tsim kho tshiab ntawm cov thev naus laus zis roj teeb, txhim kho kev siv hluav taws xob zoo, thiab txhawb kev txhim kho kom ruaj khov.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-23-2025