Graphite bipolar mbalendi gawo lofunikira lomwe limagwiritsidwa ntchito pazida zama electrochemical monga ma cell amafuta ndi ma electrolyzer, omwe nthawi zambiri amapangidwa ndi zida za graphite zoyera kwambiri. Imagwira ntchito yofunika kwambiri pakuchita kwa electrochemical, makamaka yomwe imagwiritsidwa ntchito popanga, kugawa mipweya (monga haidrojeni ndi okosijeni), komanso madera osiyana. Chifukwa mbali zake ziwiri zimalumikizana ndi anode ndi cathode ya maselo oyandikana nawo, ndikupanga mawonekedwe a "bipolar" (mbali imodzi ndi gawo la anode ndipo mbali inayo ndi gawo la cathode), imatchedwa mbale ya bipolar.
Kapangidwe ka graphite bipolar mbale
Mapepala a graphite bipolar nthawi zambiri amakhala ndi zigawo izi:
1. Flow Field: Pamwamba pa mbale ya bipolar amapangidwa ndi zovuta zoyendayenda kumunda kuti azigawira mofanana gasi (monga haidrojeni, mpweya kapena mpweya) ndikutulutsa madzi opangidwa.
2. Conductive wosanjikiza: Zinthu za graphite zokha zimakhala ndi ma conductivity abwino ndipo zimatha kuchita bwino.
3. Malo osindikizira: M'mphepete mwa mbale za bipolar nthawi zambiri amapangidwa ndi zida zomata kuti asatayike komanso kulowa kwamadzimadzi.
4. Njira zozizira (ngati mukufuna): Muzinthu zina zogwira ntchito kwambiri, matchanelo ozizirira amatha kupangidwa mkati mwa mbale za bipolar kuti aziwongolera kutentha kwa zida.
Ntchito za graphite bipolar plates
1. Conductive ntchito:
Monga electrode ya zida za electrochemical, mbale ya bipolar imayang'anira kusonkhanitsa ndikuyendetsa zamakono kuti zitsimikizire kutulutsa kwamphamvu kwamagetsi.
2. Kugawa gasi:
Kupyolera mu kapangidwe ka mayendedwe othamanga, mbale ya bipolar imagawira mofanana mpweya womwe umayendera kumalo othandizira, kulimbikitsa ma electrochemical reaction.
3. Kulekanitsa madera ochitira:
Mu selo yamafuta kapena electrolyzer, mbale za bipolar zimalekanitsa madera a anode ndi cathode, kuteteza mpweya kusakanikirana.
4. Kutaya kwa kutentha ndi ngalande:
Ma mbale a bipolar amathandizira kuwongolera kutentha kwa zida ndikutulutsa madzi kapena zinthu zina zomwe zimapangidwa ndi zomwe zimachitika.
5. Thandizo lamakina:
Mapiritsi a bipolar amapereka chithandizo chothandizira pa electrode ya membrane, kuonetsetsa kuti zidazo zimakhala zokhazikika komanso zolimba.
Chifukwa chiyani mumasankha graphite ngati zinthu za mbale za bipolar?
Zakuthupi za graphite bipolar mbale
●High conductivity:
Kuchuluka kwa resistivity kwa graphite ndikotsika ngati 10-15μΩ.cm (kuposa 100-200 μΩ·cm wazitsulo bipolar mbale).
●Kulimbana ndi corrosion:
Pafupifupi palibe dzimbiri mu acidic chilengedwe cha mafuta maselo (pH 2-3), ndi moyo utumiki akhoza kufika maola oposa 20,000 .
●Opepuka:
Kachulukidwe ndi pafupifupi 1.8 g/cm3 (7-8 g/cm3 pa mbale yachitsulo ya bipolar), zomwe zimapindulitsa kuchepetsa kulemera kwa magalimoto.
●Malo oletsa gasi:
Mapangidwe owundana a graphite amatha kupewa kulowa kwa haidrojeni ndipo ali ndi chitetezo chokwanira.
●Easy processing:
Zinthu za graphite ndizosavuta kukonza ndipo zimatha kusintha mapangidwe ndi makulidwe ovuta amayendedwe malinga ndi zosowa.
Kodi ma graphite bipolar plate amapangidwa bwanji?
Njira yopangagraphite bipolar mbalezikuphatikizapo:
●Kukonzekera zopangira:
Gwiritsani ntchito kuyera kwakukulu (> 99.9%) graphite yachilengedwe kapena ufa wa graphite.
Onjezani utomoni (monga phenolic resin) ngati chomangira kuti muwonjezere mphamvu zamakina.
●Compression Molding:
Zinthu zosakanizika zimayikidwa mu nkhungu ndikukanikizidwa ndi kutentha kwambiri (200-300 ℃) komanso kuthamanga kwambiri (> 100 MPa).
●Chithandizo cha Graphitization:
Kutenthetsa mpaka 2500-3000 ℃ mumlengalenga wozizira kumapangitsa kuti zinthu zomwe sizikhala ndi kaboni ziwonongeke ndikupanga mawonekedwe olimba a graphite.
●Wothamanga processing:
Gwiritsani ntchito makina a CNC kapena ma lasers kuti mujambule njira za serpentine, zofananira kapena zolumikizirana (kuya 0.5-1 mm).
●Chithandizo chapamwamba:
Kulowetsedwa ndi utomoni kapena zitsulo (monga golide, titaniyamu) zokutira zimachepetsa kukana kukhudzana ndikuthandizira kukana kuvala.
Kodi ma graphite bipolar plate amagwiritsidwa ntchito bwanji?
1. Fuel Cell:
- Proton exchange membrane fuel cell (PEMFC)
- Solid Oxide Fuel Cell (SOFC)
- Direct Methanol Fuel Cell (DMFC)
2. Electrolyzer:
- Kupanga kwa haidrojeni ndi electrolysis yamadzi
- Makampani a Chlor-alkali
3. Njira yosungiramo mphamvu:
- Batire yoyenda
4. Makampani a Chemical:
- Electrochemical Reactor
5. Kafukufuku wa labotale:
- Kukula kwa prototype ndikuyesa ma cell amafuta ndi ma electrolyzer
Fotokozerani mwachidule
Graphite bipolar mbalendi zigawo zikuluzikulu za zida zamagetsi zamagetsi monga ma cell amafuta ndi ma electrolyzer, ndipo zimakhala ndi ntchito zingapo monga ma conductivity, kugawa gasi, ndi kulekanitsa madera omwe amachitira. Ndi chitukuko cha ukadaulo wamagetsi oyera, mbale za graphite bipolar zikugwiritsidwa ntchito kwambiri m'magalimoto atsopano amagetsi, makina osungira mphamvu, kupanga mankhwala a hydrogen ndi madera ena.
Nthawi yotumiza: Mar-31-2025