Emkhakheni wokugcina amandla okuthuthukisiwe, amabhethri okugeleza avele kancane kancane njengesixazululo esingandiswa futhi esihlala isikhathi eside, ikakhulukazi ekusetshenzisweni okumile njengokulinganisela kwegridi, ukuhlanganiswa kwamandla avuselelekayo, kanye nezinhlelo zokusekela zezimboni. Phakathi kwezinto eziyinhloko ezinquma ukusebenza kanye nobude besikhathi salezi zinhlelo, i-graphite felt ivelele njengengxenye ebalulekile—ikakhulukazi ngaphakathi kwesakhiwo se-electrode.
I-Graphite feltiyizinto ezimboziwe, ezisekelwe kukhabhoni ezinomoya ophezulu wokuhambisa, ukumelana namakhemikhali, kanye nokuqina kokushisa. Lezi zakhiwo zenza ifaneleke kakhulu ezinhlelweni zebhethri lokugeleza, lapho ama-electrolyte oketshezi edlula khona njalo kumaseli e-electrochemical ngesikhathi sokushaja nokukhipha imijikelezo. Ngokungafani namabhethri endabuko lapho ama-electrode ehlangene futhi eqinile, amabhethri okugeleza athembele ekuhambeni koketshezi njalo ezindaweni ze-electrode. I-Graphite felt, ngenxa yenethiwekhi yayo ye-fibrous kanye nendawo enkulu yobuso, inikeza indlela ephumelelayo yokudlulisa ama-electron kanye nokusabela kwe-redox.
Kumabhethri okugeleza kwe-vanadium redox (ama-VRFB), aphakathi kwezinhlobo ezivuthiwe kakhulu kwezentengiselwano, i-graphite felt ivame ukusetshenziswa kokubili kuma-electrode amahle nangalungile. Indawo ephezulu ikhuthaza ukuxhumana okuphumelelayo nama-ion e-vanadium ku-electrolyte, kuyilapho ukuzinza kwezinto ngaphansi kwezimo ze-acidic enamandla kuqinisekisa ukuqina kwezinkulungwane zemijikelezo. Ngaphezu kwalokho, isakhiwo sayo esiguquguqukayo sivumela onjiniyela ukuthi bakhe noma bacindezele i-felt ukuze bathuthukise ingcindezi yokuxhumana, banciphise ukumelana kwangaphakathi, futhi bathuthukise ukusebenza kahle kwamanje.
Ukukhiqizwa kwe-graphite felt ngokuvamile kuhilela ukwenziwa kwe-carbonization yemicu yokwenziwa, njenge-PAN (polyacrylonitrile), ngaphansi kwemimoya elawulwayo, kulandelwe ukwelashwa kokushisa noma kokusebenzisa amakhemikhali okuzikhethela. Lokhu kwelashwa kwangemva kokwelashwa kuthuthukisa umsebenzi we-electrochemical wobuso, kudala izindawo eziningi zokulungisa ukusabela kwe-redox. Izinhlobo ezithuthukisiwe ze-graphite felt nazo zingafakwa noma zimbozwe ngama-oxide ensimbi noma ezinye izendlalelo ezisebenzayo ukuthuthukisa ukukhetha, ukunciphisa ukulahlekelwa kwe-polarization, nokusheshisa i-reaction kinetics.
Inzuzo eyodwa ephawulekayo ye-graphite felt ngaphezu kwama-electrode ensimbi noma aqinile asekelwe ku-carbon isesimeni sayo esincane esinezinhlangothi ezintathu. Inethiwekhi yefayibha exhunyiwe ayigcini nje ngokusiza ukusatshalaliswa kwe-electrolyte efanayo kodwa futhi ibekezelela ukuphazamiseka okuncane kokugeleza noma ukuguquguquka kwengcindezi, okuvamile ezinhlelweni zokugcina amandla ezinkulu. Lokhu kusiza ukugcina ukusebenza kwe-electrochemical okuqhubekayo ngisho nangaphansi kwezimo zomthwalo oguquguqukayo.
Ezinhlelweni ezisebenzayo, i-graphite felt ayiyona ingxenye ye-plug-and-play. Ukusebenza kwayo kuncike kakhulu ekwakhiweni kweseli, isilinganiso sokucindezela, ukwakheka kwe-electrolyte, kanye nokushisa kokusebenza. Onjiniyela kumele balinganise ngokucophelela i-porosity, i-conductivity, kanye nokucindezelwa lapho bekhetha izinto ezifanele ze-felt. Ubuningi obuphansi kakhulu bungabangela ukulahlekelwa okukhulu kwe-ohmic, kuyilapho ama-felt aminyene kakhulu angavimbela ukunyakaza koketshezi futhi anciphise amazinga okuthuthwa kwama-ion.
Ucwaningo oluqhubekayo luhlola izindlela zokucindezela imingcele yokusebenza kwe-graphite felt. Enye indlela ihilela ukuguqula izindawo ze-fiber ukuze kwethulwe amaqembu asebenzayo akhuthaza ngokukhetha imibhangqwana ethile ye-redox. Okunye ukugxila ku-hybrid felts ehlanganisa i-graphite nezinye izinto zokuqhuba njenge-carbon nanotubes noma i-graphene ukuthuthukisa amandla okusebenza kanye nokusabela kwendawo ngaphandle kokunciphisa ukuqhubela phambili.
Njengoba ubuchwepheshe bebhethri lokugeleza buqhubeka nokukhula futhi buthola ukwamukelwa okubanzi, indima ye-graphite ezwakalayo cishe izoba yinto ebaluleke kakhulu. Kusukela ekugcinweni kwamandla ezindlu kuya ezinhlelweni zegridi ezikala ama-megawatt, isidingo sezinto ze-electrode eziqinile, ezinganakekelwa kahle, kanye nezisebenza kahle kakhulu sihlala sinjalo.I-Graphite felt, ngenhlanganisela yayo eyingqayizivele yesakhiwo kanye nokusebenza, isalokhu iyitshe lesisekelo salokhu kuthuthukiswa.
Isikhathi sokuthunyelwe: Disemba-29-2025