Ma electrode a graphite ali ndi mphamvu zogwiritsidwa ntchito kwambiri m'magawo onse a hydrogen fuel cell ndi nyukiliya energy, ndipo ubwino wawo waukulu umachokera ku mphamvu zamagetsi zambiri za chipangizochi, kukana kutentha, kukhazikika kwa mankhwala, komanso kuthekera kosintha ma neutron. Zochitika ndi miyeso yeniyeni yogwiritsira ntchito yafotokozedwa pansipa:
I. Gawo la Mafuta a Hydrogen: Chithandizo Chachikulu cha Ma Bipolar Plates ndi Zipangizo za Electrode
Kusankha Kwambiri kwa Ma Bipolar Plates
Ma graphite bipolar plates amagwira ntchito ngati "msana" wa ma hydrogen fuel cell stacks, akuchita ntchito zinayi zofunika: kuthandizira kapangidwe kake, kulekanitsa gasi, kusonkhanitsa magetsi, ndi kuyang'anira kutentha. Mapangidwe awo a flow channel amalekanitsa bwino haidrojeni ndi okosijeni, kuonetsetsa kuti mpweya wochita zinthu ufalikira mofanana komanso kuwonjezera mphamvu ya reaction. Nthawi yomweyo, kutentha kwawo kumasunga kutentha kokhazikika. Mu 2024, kupanga ndi kugulitsa magalimoto a hydrogen fuel cell ku China kunakwera ndi 40% pachaka, zomwe zinapangitsa kuti msika wa bipolar plate upitirire kukula. Ma graphite bipolar plates anali 58.7% ya gawo la msika wa bipolar plate ku China, makamaka chifukwa cha phindu lawo (30%-50% yotsika kuposa ma chitsulo bipolar plates) komanso ukadaulo wokhwima wopangira zinthu zotentha.
Udindo Wowonjezera Magwiridwe Antchito mu Zipangizo za Electrode
- Zinthu Zoyipa za Electrode: Kuchuluka kwa magetsi komanso kukhazikika kwa mankhwala a graphite kumapangitsa kuti ikhale chinthu chabwino kwambiri cha ma electrode oipa a hydrogen fuel cell, zomwe zimathandiza kuti ma electron alandire bwino komanso kuti ma ion azilowa bwino pamene akuchepetsa kukana kwa mkati.
- Chodzaza Chowongolera Ma Electrode Chabwino: Mu ma electrode abwino a sodium/potassium ion exchange resin, graphite imagwira ntchito ngati chodzaza chowongolera kuti iwonjezere kuyendetsa bwino kwa zinthu ndikukonza njira zoyendera ma ion.
- Ntchito Yoteteza Gawo: Zophimba za graphite zimaletsa kukhudzana mwachindunji pakati pa ma electrolyte ndi zinthu zoyipa za electrode, zomwe zimaletsa kuwonongeka kwa okosijeni ndikuwonjezera nthawi ya batri. Mwachitsanzo, kampani ina idachulukitsa kawiri moyo wa ma electrode oipa mwa kukhazikitsa gawo loteteza la graphite.
Kubwerezabwereza kwa Ukadaulo ndi Kuthekera kwa Msika
Kukula kwa msika wa ma graphite plates owonda kwambiri (makulidwe ≤ 0.1 mm) omwe amagwiritsidwa ntchito mu ma hydrogen fuel cell bipolar plates adafika pa RMB 820 miliyoni mu 2024, ndi kukula kwa pachaka kwa 45%. Pamene zolinga za "dual carbon" za ku China zikuyendetsa chitukuko cha unyolo wamakampani opanga mphamvu za hydrogen, msika wa ma fuel cell ukuyembekezeka kupitirira RMB 100 biliyoni pofika chaka cha 2030, zomwe zikuwonjezera kufunikira kwa ma graphite bipolar plates. Pakadali pano, kugwiritsa ntchito kwakukulu kwa zida zopangira hydrogen electrolysis m'madzi kumakulitsa kwambiri ntchito za ma graphite electrodes m'makina osungira mphamvu zongowonjezwdwanso.
II. Gawo la Mphamvu za Nyukiliya: Chitetezo Chofunika Kwambiri pa Chitetezo ndi Kugwira Ntchito Bwino kwa Reactor
Zinthu Zazikulu Zothandizira Kuwongolera ndi Kulamulira Neutron
Ma electrode a graphite adapangidwa koyamba ngati owongolera ma neutron a ma axial-graphite reactors, kuwongolera kuchuluka kwa ma nuclear reaction pochepetsa liwiro la ma neutron kuti atsimikizire kuti reactor ikugwira ntchito bwino. Malo ake osungunuka kwambiri (3,652°C), kukana dzimbiri, komanso kukhazikika kwa ma radiation (kusunga umphumphu wa kapangidwe kake pansi pa kuwonetsedwa kwa nthawi yayitali kwa ma radiation) zimapangitsa kuti ikhale chisankho chabwino kwambiri cha ndodo zowongolera ma nuclear reactor ndi zinthu zotetezera. Mwachitsanzo, reactor yoziziritsidwa ndi gasi (HTGR) yaku China imagwiritsa ntchito graphite ya nuclear-grade ngati maziko a zinthu zamafuta, ndi kuwongolera mwamphamvu kuchuluka kwa zodetsa (makamaka boron) pamlingo wa ppm kuti ipewe kusokonezedwa ndi ma neutron absorption.
Kugwira Ntchito Kokhazikika M'malo Otentha Kwambiri
Mu ma reactor a nyukiliya, graphite iyenera kupirira kutentha kwambiri (mpaka 2,000°C) ndi malo okhala ndi ma radiation amphamvu. Kuchuluka kwa kutentha kwake (100–200 W/m·K) kumathandiza kuti kutentha kusamutsidwe mwachangu mkati mwa reactor, kuchepetsa malo otentha komanso kukonza bwino kayendetsedwe ka kutentha. Mwachitsanzo, ma HTGR a m'badwo wachinayi amagwiritsa ntchito graphite ngati zinthu zofunika kwambiri, zomwe zimapangitsa kuti mafuta a nyukiliya agwiritsidwe ntchito bwino kudzera mu graphite yomwe imachepetsa mphamvu ya neutron.
Mavuto a Ukadaulo ndi Kupambana kwa Pakhomo
- Kutupa kwa Neutron Irradiation: Kuwonekera kwa nthawi yayitali ku neutron irradiation kumayambitsa kukula kwa graphite voliyumu (kutupa kwa neutron), zomwe zingasokoneze umphumphu wa kapangidwe ka reactor. China yachepetsa izi mwa kukonza kapangidwe ka grain ya graphite (monga kugwiritsa ntchito isotropic graphite) kuti ichepetse kuchuluka kwa kutupa komwe kuli pansi pa 0.5%.
- Kugwiritsa Ntchito Mphamvu ya Radiyo: Graphite imapanga ma isotope a radioactive (monga, carbon-14) pambuyo pogwiritsa ntchito reactor, zomwe zimapangitsa kuti pakhale njira zapadera (monga, ukadaulo wamafuta a HTGR wokhala ndi utoto) kuti achepetse zoopsa zoyambitsa mphamvu ya radiyo.
- Kupita Patsogolo kwa Kupanga Kwapakhomo: Mu 2025, graphite ya nyukiliya ya ku China ya ma HTGR idapereka satifiketi ya dziko lonse, ndipo kufunikira kwake kukuyembekezeka kupitirira matani 20,000, zomwe zidapangitsa kuti mayiko ena akunja asamagwiritse ntchito mphamvu zawo. Kampani imodzi idachepetsa mtengo wa graphite ya nyukiliya ndi 30% pokhazikitsa luso lopanga singano za singano, zomwe zidakulitsa mpikisano wapadziko lonse.
III. Mgwirizano wa Magawo Onse ndi Zochitika Zamtsogolo
Zatsopano Zopangira Zinthu Zolimbikitsa Kupititsa patsogolo Magwiridwe Antchito
- Kupanga Zinthu Zophatikizana: Kuphatikiza graphite ndi ma resin kapena ulusi wa kaboni kumawonjezera mphamvu ya makina komanso kukana dzimbiri. Mwachitsanzo, ma graphite-resin bipolar plates amawonjezera moyo wautumiki mpaka zaka zoposa zisanu mu ma electrolyzer a mafakitale a chlor-alkali.
- Ukadaulo Wosintha Malo: Zophimba za nitride zimawonjezera mphamvu yamagetsi ya graphite, zomwe zimapangitsa kuti ikhale yotsika poyerekeza ndi zitsulo komanso zimakwaniritsa zofunikira zama cell amafuta amphamvu kwambiri.
Kuphatikiza Unyolo wa Mafakitale ndi Kapangidwe ka Padziko Lonse
Makampani aku China amateteza kukhazikika kwa zinthu zopangira pogwiritsa ntchito ndalama zomwe zayikidwa m'migodi ya graphite yakunja (monga ku Mozambique) ndi mafakitale opangira zinthu ku Malaysia, pomwe akusunga ukadaulo wofunikira mdziko muno. Kutenga nawo mbali pakukhazikitsa miyezo yapadziko lonse lapansi (monga miyezo yoyesera ma electrode a graphite a ISO) kumalimbitsa utsogoleri waukadaulo ndikutsata malamulo azachilengedwe monga msonkho wa malire a mpweya wa carbon wa EU.
Ndondomeko ndi Kukula Koyendetsedwa ndi Msika
China ikufuna kuwonjezera gawo la kupanga zitsulo zamagetsi pa ng'anjo yamagetsi kufika pa 15%-20% pofika chaka cha 2025, zomwe zimalimbikitsa kufunikira kwa ma electrode a graphite mwachindunji. Pakadali pano, magawo omwe akutukuka monga mphamvu ya hydrogen ndi malo osungira mphamvu amapereka mwayi wamsika wa ma electrode a graphite trillion-yuan. Mapulani apadziko lonse lapansi okonzanso mphamvu ya nyukiliya (monga cholinga cha Japan cha magalimoto a hydrogen 20% pofika chaka cha 2030 ndi ndalama zowonjezera za nyukiliya ku Europe) zidzakulitsa kwambiri kugwiritsa ntchito ma electrode a graphite mu kayendedwe ka mafuta a nyukiliya komanso kupanga hydrogen.
Nthawi yotumizira: Ogasiti-05-2025