Hauv kev khaws cia lub zog siab heev, cov roj teeb ntws tau maj mam tshwm sim ua qhov kev daws teeb meem uas nthuav dav thiab siv tau ntev, tshwj xeeb tshaj yog rau cov ntawv thov ruaj khov xws li kev sib npaug ntawm lub grid, kev sib koom ua ke ntawm lub zog rov ua dua tshiab, thiab cov txheej txheem thaub qab hauv kev lag luam. Ntawm cov ntaub ntawv tseem ceeb uas txiav txim siab qhov ua tau zoo thiab lub neej ntev ntawm cov kab ke no, graphite felt sawv tawm ua ib qho tseem ceeb - tshwj xeeb tshaj yog hauv cov qauv electrode.
Cov khoom siv graphiteyog ib yam khoom siv uas muaj qhov ntxeem tau, ua los ntawm cov pa roj carbon uas muaj kev coj ua siab, tiv taus tshuaj lom neeg, thiab ruaj khov thermal. Cov yam ntxwv no ua rau nws zoo heev rau cov roj teeb ntws, qhov twg cov kua electrolytes txuas ntxiv dhau los ntawm cov hlwb electrochemical thaum lub sijhawm them thiab tso tawm. Tsis zoo li cov roj teeb ib txwm muaj qhov twg cov electrodes yog compact thiab ruaj khov, cov roj teeb ntws vam khom kev txav mus los ntawm cov kua dej tas li hla cov nplaim electrode. Graphite felt, vim nws cov fibrous network thiab thaj chaw loj, muab cov khoom siv zoo rau kev hloov pauv electron thiab redox reactions.
Hauv cov roj teeb vanadium redox flow (VRFBs), uas yog cov hom lag luam uas paub tab tshaj plaws, graphite felt feem ntau siv rau ob qho tib si positive thiab negative electrodes. Qhov chaw siab ua rau muaj kev sib cuag zoo nrog vanadium ions hauv electrolyte, thaum cov khoom siv ruaj khov nyob rau hauv cov chaw acidic heev ua kom muaj kev ruaj khov ntau txhiab lub voj voog. Ntxiv mus, nws cov qauv yooj ywm tso cai rau cov engineers los ua kom zoo nkauj lossis nias lub felt kom zoo dua qhov kev sib cuag siab, txo qhov tsis kam sab hauv, thiab txhim kho tag nrho cov txiaj ntsig tam sim no.
Kev tsim cov graphite felt feem ntau cuam tshuam nrog kev ua kom cov fibers hluavtaws, xws li PAN (polyacrylonitrile), nyob rau hauv huab cua tswj, ua raws li kev xaiv thermal lossis tshuaj lom neeg ua haujlwm. Cov kev kho mob tom qab no ntxiv txhim kho cov haujlwm electrochemical ntawm qhov chaw, tsim ntau qhov chaw catalytic rau cov tshuaj redox. Cov qauv siab heev ntawm graphite felt kuj tseem yuav raug doped lossis coated nrog cov hlau oxides lossis lwm cov txheej txheem ua haujlwm los txhim kho kev xaiv, txo cov kev poob polarization, thiab ua kom cov tshuaj tiv thaiv kinetics.
Ib qho zoo ntawm graphite xav txog cov hlau lossis cov pa roj carbon uas ruaj khov yog nyob rau hauv nws cov qauv peb-seem. Lub network fiber sib txuas tsis yog tsuas yog pab txhawb kev faib tawm electrolyte sib xws tab sis kuj zam cov teeb meem me me lossis kev hloov pauv siab, uas yog qhov tshwm sim hauv cov txheej txheem khaws cia hluav taws xob loj. Qhov no pab tswj kev ua haujlwm electrochemical sib xws txawm tias nyob rau hauv cov xwm txheej thauj khoom dynamic.
Hauv cov txheej txheem ua haujlwm, graphite felt tsis yog ib qho khoom siv plug-and-play. Nws qhov kev ua tau zoo yog nyob ntawm kev tsim qauv ntawm lub cell, qhov sib piv ntawm kev sib xyaw, cov electrolyte sib xyaw, thiab qhov kub ua haujlwm. Cov kws ua haujlwm yuav tsum ua tib zoo sib npaug porosity, conductivity, thiab compressibility thaum xaiv cov khoom siv felt zoo. Qhov ceev qis dhau yuav ua rau muaj kev poob ohmic ntau ntxiv, thaum cov felts ntom dhau tuaj yeem txwv kev txav mus los ntawm cov kua thiab txo cov nqi thauj ion.
Kev tshawb fawb txuas ntxiv mus yog tshawb nrhiav txoj hauv kev los thawb cov ciam teb ntawm kev ua tau zoo ntawm graphite. Ib qho kev taw qhia suav nrog kev hloov kho cov nplaim fiber kom qhia cov pab pawg ua haujlwm uas xaiv txhawb cov khub niam txiv redox tshwj xeeb. Lwm qhov kev tsom mus rau yog nyob rau ntawm cov felts sib xyaw uas sib xyaw graphite nrog lwm cov ntaub ntawv conductive xws li carbon nanotubes lossis graphene los txhim kho lub zog kho tshuab thiab qhov chaw reactivity yam tsis muaj kev txi conductivity.
Raws li thev naus laus zis roj teeb ntws txuas ntxiv mus thiab pom kev siv dav dua, lub luag haujlwm ntawm graphite felt yuav tseem ceeb dua. Txij li kev khaws cia hluav taws xob hauv tsev mus rau megawatt-scale grid systems, qhov xav tau rau cov khoom siv electrode ruaj khov, tsis tas yuav saib xyuas, thiab ua haujlwm tau zoo tseem nyob ruaj khov.Cov khoom siv graphite, nrog nws txoj kev sib xyaw ua ke ntawm cov qauv thiab kev ua haujlwm, tseem yog lub hauv paus ntawm txoj kev loj hlob no.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-29-2025