Kugwiritsa Ntchito Graphite Felt pa Batri Yoyenda

Pankhani yosungira mphamvu zapamwamba, mabatire oyenda pang'onopang'ono ayamba kugwiritsidwa ntchito ngati njira yowonjezereka komanso yokhalitsa, makamaka pa ntchito zokhazikika monga kulinganiza ma gridi, kuphatikiza mphamvu zongowonjezwdwanso, ndi machitidwe osungira zinthu m'mafakitale. Pakati pa zipangizo zazikulu zomwe zimatsimikizira magwiridwe antchito ndi moyo wautali wa machitidwewa, graphite felt imaonekera ngati gawo lofunikira kwambiri—makamaka mkati mwa kapangidwe ka ma electrode.

Graphite inamvekaNdi chinthu chokhala ndi mabowo, chopangidwa ndi kaboni chokhala ndi mphamvu yoyendetsa bwino magetsi, kukana mankhwala, komanso kukhazikika kwa kutentha. Zinthu zimenezi zimapangitsa kuti chikhale choyenera kwambiri machitidwe a batire yoyenda, komwe ma electrolyte amadzimadzi amadutsa nthawi zonse m'maselo amagetsi panthawi yochaja ndi kutulutsa magetsi. Mosiyana ndi mabatire achikhalidwe komwe ma electrode amakhala ochepa komanso okhazikika, mabatire oyenda amadalira kuyenda kwamadzimadzi nthawi zonse pamwamba pa ma electrode. Graphite felt, chifukwa cha netiweki yake ya ulusi ndi malo ake akuluakulu, imapereka njira yothandiza yotumizira ma electron ndi redox reactions.

Mu mabatire a vanadium redox flow (VRFBs), omwe ndi amodzi mwa mitundu yokhwima kwambiri yogulitsa, graphite felt imagwiritsidwa ntchito kwambiri pa ma electrode abwino komanso oipa. Malo okwera amalimbikitsa kukhudzana bwino ndi ma ioni a vanadium mu electrolyte, pomwe kukhazikika kwa zinthuzo pansi pa acidic kwambiri kumatsimikizira kulimba kwa ma cycle masauzande ambiri. Kuphatikiza apo, kapangidwe kake kosinthasintha kamalola mainjiniya kupanga kapena kukanikiza felt kuti akonze kuthamanga kwa contact, kuchepetsa kukana kwamkati, ndikuwonjezera magwiridwe antchito amagetsi onse.

Kupanga graphite felt nthawi zambiri kumaphatikizapo kuyika ulusi wopangidwa ndi kaboni m'ma ulusi wopangidwa, monga PAN (polyacrylonitrile), pansi pa mlengalenga wolamulidwa, kutsatiridwa ndi njira zina zosinthira kutentha kapena mankhwala. Mankhwalawa pambuyo pake amawonjezeranso ntchito yamagetsi pamwamba, ndikupanga malo ambiri othandizira kuti pakhale zochitika za redox. Mitundu yapamwamba ya graphite felt ingathenso kupakidwa kapena kupakidwa ndi zitsulo kapena zigawo zina zogwirira ntchito kuti ziwongolere kusankha, kuchepetsa kutayika kwa polarization, ndikufulumizitsa reaction kinetics.

Ubwino umodzi wodziwika bwino wa graphite felt kuposa ma electrode achitsulo kapena olimba okhala ndi kaboni uli mu kapangidwe kake kakang'ono ka magawo atatu. Netiweki yolumikizidwa ya ulusi sikuti imangothandiza kugawa kwa ma electrolyte ofanana komanso imalekerera kusokonezeka pang'ono kwa kayendedwe ka madzi kapena kusinthasintha kwa kuthamanga kwa magazi, komwe kumachitika kawirikawiri m'makina akuluakulu osungira mphamvu. Izi zimathandiza kusunga magwiridwe antchito amagetsi nthawi zonse ngakhale pansi pa mikhalidwe yosinthasintha yamagetsi.

Mu machitidwe ogwiritsira ntchito, graphite felt si gawo lofunikira kwambiri. Kugwira ntchito kwake kumadalira kwambiri kapangidwe ka maselo, chiŵerengero cha kupsinjika, kapangidwe ka electrolyte, ndi kutentha kwa ntchito. Mainjiniya ayenera kusamala bwino poyesa porosity, conductivity, ndi compressiveness posankha zinthu zoyenera za felt. Kuchuluka kwambiri kungayambitse kutayika kwa ohmic, pomwe ma felt okhuthala kwambiri amatha kuletsa kuyenda kwa madzi ndikuchepetsa kuchuluka kwa ma ion transportation.

Kafukufuku amene akuchitika akufufuza njira zopititsira patsogolo ntchito ya graphite felt. Njira imodzi ikuphatikizapo kusintha malo a ulusi kuti akhazikitse magulu ogwira ntchito omwe amalimbikitsa ma redox couples enaake. Cholinga china chili pa ma hybrid felts omwe amaphatikiza graphite ndi zinthu zina zoyendetsera monga carbon nanotubes kapena graphene kuti akonze mphamvu ya makina ndi reactivity ya pamwamba popanda kuwononga conductivity.

Pamene ukadaulo wa mabatire oyenda ukupitilirabe kusintha ndikuyamba kugwiritsidwa ntchito kwambiri, ntchito ya graphite yomwe imamveka ikuyembekezeka kukhala yofunika kwambiri. Kuyambira kusungira mphamvu m'nyumba mpaka makina a gridi a megawatt-scale, kufunikira kwa zipangizo zama electrode zolimba, zosakonzedwa bwino, komanso zogwira ntchito bwino kumakhalabe kosalekeza.Graphite inamveka, yokhala ndi kapangidwe kake kapadera komanso magwiridwe antchito, ikadali maziko a chitukukochi.