ʻO ka papa bipolar ka ʻāpana koʻikoʻi o ka reactor, nona ka hopena nui i ka hana a me ke kumukūʻai o ka reactor. I kēia manawa, ua māhele nui ʻia ka papa bipolar i ka papa graphite, ka papa composite a me ka papa metala e like me ka mea.
ʻO ka papa bipolar kekahi o nā ʻāpana koʻikoʻi o PEMFC, ʻo kāna kuleana nui ka lawe ʻana i ke kinoea ma o ke kahua kahe o ka ʻili, hōʻiliʻili a alakaʻi i ke au, ka wela a me ka wai i hana ʻia e ka hopena. Ma muli o ke ʻano o ka mea, ʻo ke kaumaha o ka waihona PEMFC ma kahi o 60% a 80% a ʻo ke kumukūʻai ma kahi o 30%. Wahi a nā koi hana o ka papa bipolar, a me ka noʻonoʻo ʻana i ke kaiapuni hopena electrochemical acidic o PEMFC, pono ka papa bipolar e loaʻa nā koi kiʻekiʻe no ka conductivity uila, ka paʻa o ka ea, nā waiwai mechanical, ke kūpaʻa ʻana i ka corrosion, a pēlā aku.
E like me nā mea i hoʻokaʻawale nui ʻia i ʻekolu mau ʻano o ka papa graphite, ka papa composite, ka papa metal, a me ka papa graphite ka mea maʻamau i ka hoʻohana ʻia ʻana o ka papa PEMFC pālua i kēia manawa, conductivity uila, conductivity thermal, kūpaʻa maikaʻi a me ke kūpaʻa i ka corrosion a me nā hana ʻē aʻe akā ʻaʻole maikaʻi nā waiwai mechanical, brittle, a me nā pilikia machining e alakaʻi ai i nā pilikia kumukūʻai kiʻekiʻe.
Graphitepā bipolarhoʻolauna
Loaʻa i nā papa bipolar i hana ʻia me ka graphite ka conductivity uila maikaʻi, ka conductivity wela a me ke kūpaʻa i ka corrosion, a ʻo ia nā papa bipolar i hoʻohana pinepine ʻia ma PEMFCS. Eia nō naʻe, ʻoi aku ka maopopo o kona mau hemahema: ʻoi aku ka mahana o ka graphitization o ka papa graphite ma mua o 2500 ℃, pono e hoʻokō ʻia e like me ke kaʻina hana hoʻomehana paʻa, a lōʻihi ka manawa; Lohi ke kaʻina hana mīkini, lōʻihi ke kaʻina hana, a kiʻekiʻe ke kiko o ka mīkini, e hopena ana i ke kumukūʻai kiʻekiʻe o ka papa graphite; He palupalu ka graphite, pono e mālama pono ʻia ka papa i hoʻopau ʻia, paʻakikī ka ʻākoakoa; He porous ka graphite, no laila pono nā papa i kekahi mau millimeters ka mānoanoa e ʻae i nā kinoea e hoʻokaʻawale, e hopena ana i ka haʻahaʻa o ka density o ka mea ponoʻī, akā he huahana kaumaha i hoʻopau ʻia.
Ka hoʻomākaukau ʻana o ka graphitepā bipolar：
Hoʻohui ʻia ka pauka toner a i ʻole ka pauka graphite me ka resin graphitized, hoʻokumu ʻia i ka paʻi, a hoʻonui ʻia i ka mahana wela (maʻamau ma 2200 ~ 2800C) i loko o kahi lewa hoʻemi a i ʻole ma lalo o nā kūlana vacuum. A laila, hoʻopiha ʻia ka papa graphite e sila i ka lua, a laila hoʻohana ʻia ka mīkini hoʻomalu helu e hana i ke ala kinoea e pono ai ma kona ʻili. ʻO ke GRAPHITIZATION TEMPERATURE KIʻEKIʻE A ME KA MACHINING O NĀ GAS CHANNELS NUI NO KE KUMUKŪʻAI KIʻEKIʻE O NĀ PALAPALA BIPOLAR, ME KA MACHINING ACCOUNTING NO KA aneane 60% O KA HUINA KUMUKŪʻAI FUEL CELL.
Papa bipolarʻo ia kekahi o nā ʻāpana koʻikoʻi loa i loko o ka waihona wahie. ʻO kāna mau hana nui penei:
1, Hoʻohui pākahi hoʻokahi
2, Hāʻawi i ka wahie (H2) a me ka ea (02)
3, Ka hōʻiliʻili a me ke alakaʻi ʻana o kēia manawa
4, Kākoʻo waihona a me MEA
5, No ka wehe ʻana i ka wela i hana ʻia e ka hopena
6. E hoʻokahe i ka wai i hana ʻia ma ka hopena
Ka manawa hoʻouna: Iulai-29-2022