Graphite bipolar platendi gawo lofunika kwambiri lomwe limagwiritsidwa ntchito mu zida zamagetsi monga ma cell amafuta ndi ma electrolyzer, nthawi zambiri amapangidwa ndi zinthu za graphite zoyera kwambiri. Imagwira ntchito yofunika kwambiri mu ma electrochemical reactions, makamaka omwe amagwiritsidwa ntchito poyendetsa magetsi, kugawa mpweya wochitapo kanthu (monga hydrogen ndi oxygen), ndi madera olekanitsa ma reaction. Chifukwa mbali zake ziwiri zimalumikizana ndi anode ndi cathode ya maselo amodzi oyandikana, ndikupanga kapangidwe ka "bipolar" (mbali imodzi ndi munda wa anode flow ndipo mbali inayo ndi munda wa cathode flow), imatchedwa bipolar plate.
Kapangidwe ka mbale ya graphite bipolar
Ma graphite bipolar plates nthawi zambiri amakhala ndi magawo otsatirawa:
1. Munda Woyenda: Pamwamba pa mbale ya bipolar yapangidwa ndi kapangidwe ka malo oyendamo ovuta kuti agawire mofanana mpweya wochitapo kanthu (monga haidrojeni, mpweya kapena mpweya) ndikutulutsa madzi opangidwa.
2. Woyendetsa galimoto: Zinthu za graphite zokha zimakhala ndi mphamvu yoyendetsa bwino magetsi ndipo zimatha kuyendetsa bwino magetsi.
3. Malo otsekera: M'mphepete mwa ma bipolar plates nthawi zambiri amapangidwa ndi zinthu zotsekera kuti apewe kutuluka kwa mpweya ndi kulowa kwa madzi.
4. Njira zoziziritsira (ngati mukufuna): Mu ntchito zina zogwira ntchito bwino, njira zoziziritsira zitha kupangidwa mkati mwa ma bipolar plates kuti ziwongolere kutentha kwa chipangizocho.
Ntchito za ma graphite bipolar plates
1. Ntchito yoyendetsa:
Monga ma electrode a zida zamagetsi, mbale ya bipolar imayang'anira kusonkhanitsa ndi kuyendetsa mphamvu kuti iwonetsetse kuti mphamvu zamagetsi zimatulutsa bwino.
2. Kugawa kwa gasi:
Kudzera mu kapangidwe ka njira yoyendera madzi, mbale ya bipolar imagawa mpweya woyamwa mofanana ku gawo la catalyst, zomwe zimapangitsa kuti electrochemical reaction ichitike.
3. Kulekanitsa madera ochitira zinthu:
Mu fuel cell kapena electrolyzer, ma bipolar plates amalekanitsa madera a anode ndi cathode, zomwe zimaletsa mpweya kusakanizika.
4. Kutaya kutentha ndi madzi:
Ma bipolar plates amathandiza kulamulira kutentha kwa zipangizo ndi kutulutsa madzi kapena zinthu zina zomwe zimapangidwa ndi zomwe zimachitika.
5. Thandizo la makina:
Ma bipolar plates amapereka chithandizo cha kapangidwe ka electrode ya nembanemba, kuonetsetsa kuti zidazo zimakhala zolimba komanso zolimba.
N’chifukwa chiyani mungasankhe graphite ngati zinthu zoyezera zinthu zozungulira?
Kapangidwe ka zinthu za graphite bipolar plates
●Mphamvu yothamanga kwambiri:
Kukana kwakukulu kwa graphite ndi kotsika kufika pa 10-15μΩ.cm (kuposa 100-200 μΩ·cm yambale yachitsulo yosinthasintha).
●Kukana dzimbiri:
Palibe dzimbiri m'malo okhala ndi asidi m'maselo amafuta (pH 2-3), ndipo moyo wautumiki ungafikire maola opitilira 20,000.
●Wopepuka:
Kuchulukana kwake ndi pafupifupi 1.8 g/cm3 (7-8 g/cm3 ya mbale yachitsulo ya bipolar), zomwe zimathandiza kuchepetsa kulemera kwa galimoto.
●Katundu woteteza gasi:
Kapangidwe kolimba ka graphite kamatha kuletsa kulowa kwa haidrojeni ndipo kali ndi chitetezo champhamvu.
●Kukonza kosavuta:
Zinthu zopangidwa ndi graphite n'zosavuta kuzikonza ndipo zimatha kusintha mapangidwe ndi kukula kwa njira zoyendera madzi mosiyanasiyana malinga ndi zosowa.
Kodi ma graphite bipolar plates amapangidwa bwanji?
Njira yopangirambale ya bipolar ya graphitezikuphatikizapo izi:
●Kukonzekera zinthu zopangira:
Gwiritsani ntchito graphite yachilengedwe yoyera kwambiri (>99.9%) kapena ufa wa graphite wopangidwa.
Onjezani utomoni (monga phenolic resin) ngati chomangira kuti muwonjezere mphamvu ya makina.
●Kupondereza Kuumba:
Zinthu zosakanikiranazo zimalowetsedwa mu nkhungu ndikuzikanikiza pa kutentha kwakukulu (200-300℃) ndi kuthamanga kwambiri (>100 MPa).
●Chithandizo cha graphitization:
Kutentha kufika pa 2500-3000℃ mumlengalenga wopanda mpweya kumapangitsa kuti zinthu zopanda mpweya zisinthe n’kupanga kapangidwe ka graphite kolimba.
●Kukonza kwa wothamanga:
Gwiritsani ntchito makina a CNC kapena ma laser kuti mudule njira zoyezera, zofananira kapena zolumikizana (kuya kwa 0.5-1 mm).
●Chithandizo cha pamwamba:
Kupaka utoto ndi utomoni kapena chitsulo (monga golide, titaniyamu) kumachepetsa kukana kukhudzana ndi zinthu ndipo kumawonjezera kukana kukalamba.
Kodi ma graphite bipolar plates amagwiritsidwa ntchito bwanji?
1. Selo ya Mafuta:
- Selo yamafuta ya membrane ya Proton exchange (PEMFC)
- Selo ya Mafuta Yolimba ya Oxide (SOFC)
- Selo ya Mafuta ya Methanol Yolunjika (DMFC)
2. Choyezera chamagetsi:
- Kupanga kwa haidrojeni pogwiritsa ntchito electrolysis ya madzi
- Makampani a Chlor-alkali
3. Njira yosungira mphamvu:
- Batire yoyenda
4. Makampani Opanga Mankhwala:
- Choyatsira chamagetsi
5. Kafukufuku wa m'ma laboratories:
- Kupanga ndi kuyesa zitsanzo za maselo amafuta ndi ma electrolyzer
Chidule
Mapepala osinthasintha a graphiteNdi zigawo zazikulu za zida zamagetsi monga ma cell amafuta ndi ma electrolyzer, ndipo zimakhala ndi ntchito zambiri monga kuyendetsa bwino magetsi, kugawa mpweya, komanso kulekanitsa madera ochitira zinthu. Ndi chitukuko cha ukadaulo wamagetsi oyera, ma graphite bipolar plates akugwiritsidwa ntchito kwambiri m'magalimoto atsopano amphamvu, machitidwe osungira mphamvu, kupanga mankhwala a haidrojeni ndi madera ena.
Nthawi yotumizidwa: Marichi-31-2025