I. Basa Guru reGraphite Bipolar Plates muKuwanda kweMaindasitiri
Zvichienderana nezvinangwa zve "dual carbon" uye kukura nekukurumidza kwehupfumi hwehydrogen, masero emafuta (kunyanya masero emafuta ePEM) ari kuchinja kubva padanho rekuratidzira kuenda pakushandiswa kukuru. Kubva kumotokari dzinotakura vanhu kusvika kumagetsi akapararira, kushanda zvakanaka kwesistimu, hupenyu hwese, uye mutengo wemasero emafuta zviri kuva zviratidzo zvikuru zvemakwikwi eindasitiri.
Muhurongwa uhu, girafu regirafu rinotenderera harisi "chikamu chekubatsira" chete, asi chimwe chezvinhu zvikuru zvinosarudza mashandiro egirafu remasero. Tsvagiridzo inoratidza kuti magirafu egirafu anotora inenge 60-80% yehuremu uye 40-50% yemutengo wegirafu remasero; dhizaini yavo uye kusarudzwa kwezvinhu zvinokanganisa zvakananga kuwanda kwesimba resisitimu, kugara kwenguva refu, uye mari yekugadzira.
Kubva pamaonero ekushanda kwemagetsi, maplate e graphite bipolar anowana simba rakasimba uye rinoenderera mberi remagetsi emasero emafuta nekubatanidza mabasa akawanda - kusanganisira "kutungamirwa kwemagetsi, kugoverwa kwegasi, manejimendi yekupisa, uye rutsigiro rwechimiro" - zvichiita kuti zvive "chikamu chepakati chekubatanidza ma "multi-physics" mukati me "stack".
II. Basa uye Nheyo dzeMashandiro eGraphite Bipolar Plates muMasero eFuel
Mune mapurotoni anowanzo shandiswa pakugadzira mapurotoni (PEMFC), magirafu egirafu egirafu ari kumativi ese e membrane electrode assembly (MEA), achibatanidza mabasa emayuniti efuel cell akabatana ne series kuburikidza nechimiro chawo chine mativi maviri.
Pfungwa yekushanda kwayo inogona kunzwisiswa kuburikidza nemaitiro mana akabatana anotevera:
Chekutanga inyaya yekuunganidza nekupinza magetsi panguva ino. Munguva yekuchinja kwemasero emafuta, hydrogen inorasikirwa nemaerekitironi paanode, uye maerekitironi aya anoburitswa sesimba kuburikidza nedunhu rekunze. Bipolar plate ndiyo inotungamira maerekitironi kubva kune rimwe sero kuenda kune rinotevera. Kufambisa magetsi kwegraphite mukati memagetsi kunogona kusvika pa10⁴ S/cm, zvichideredza zvakanyanya kurasikirwa kweohmic uye nekudaro zvichivandudza kushanda zvakanaka kwesystem.
Chechipiri inzira yekufambisa reactant uye yekudzora flow field. Nzvimbo yebipolar plate yakagadzirwa nemachina ekuyerera akanyatsogadzirwa kuti iparadzire hydrogen nemhepo zvakaenzana uye kubvisa mvura inogadzirwa nereaction. Maitiro aya idambudziko rekudzora flow yegesi-liquid ine zvikamu zviviri, uye dhizaini yayo inokanganisa zvakananga kushanda zvakanaka kwekutakura uye kugadzikana kwekushanda kwebhatiri.
Chechitatu inzira yekutonga kupisa. Masero emafuta anogadzira kupisa panguva yekushanda; kana kupisa uku kukasakwanisa kunyangarika zvinobudirira, kuchaita kuti nzvimbo dzinopisa dzive panzvimbo imwe chete uye kukurumidzisa kukwegura kwe membrane electrode. Kufambisa kwakanaka kwekupisa kweGraphite kunoita kuti iparadzire kupisa nekukurumidza uye zvakaenzana mukati me plane, nokudaro ichichengetedza nzvimbo yakagadzikana yekupisa mukati me stack.
Pakupedzisira, pane nzira yekuvhara nekuparadzanisa. Kuburikidza nekugadzirwa kwechivako uye sisitimu yekuvhara yakabatana, bipolar plate inoita kuti hydrogen neokisijeni zviparadzaniswe zvakasimba, zvichidzivirira kusvibiswa kwegasi. Izvi hazvingokanganisi kushanda zvakanaka chete asiwo zvinokanganisa zvakananga kuchengetedzeka kwesisitimu.
Muchidimbu, musimboti wekushanda kwemaplate egraphite bipolar hausi muitiro mumwe chete wepanyama, asi mugumisiro wekubatana kwesystem yakabatana ine minda yakawanda inosanganisira zvinhu zvemagetsi, zvekupisa, zvekuyerera, uye zvekuvaka.
III. Sei Uchifanira Kusarudza Graphite: Kuongorora Hunhu Hwakakosha Hwemuviri
Graphite yave kushandiswa zvakanyanya mu bipolar plate, munhoroondo uye nhasi, nekuda kwekubatsira kwayo kwakazara mumatanho akasiyana-siyana ekuongorora mashandiro.
Panyaya yehunhu hwemagetsi, graphite inoratidza kufambiswa kwemagetsi kwakanaka; chimiro chayo chakarongwa chinopa nzira inoramba ichienderera yekufambisa maerekitironi, zvichiita kuti ive chinhu chakakodzera kusangana nezvinodiwa zvehunyanzvi zveDOE (kufambiswa kwemagetsi > 100 S/cm).
Panyaya yekugadzikana kwemakemikari, graphite inodzivirira ngura zvakanyanya. Munzvimbo ine acidic uye ine mukana wepamusoro wemasero emafuta, zvinhu zvesimbi zvinowanzo ngura uye zvinoumba zvidimbu zvepassivation, nokudaro zvichiwedzera kuramba kusangana. Kusiyana neizvi, graphite ine makemikari asina simba, zvichiita kuti ishande kwenguva refu.
Nezvehunhu hwekupisa, graphite ine thermal conductivity yakakwira, iyo inobatsira kuwana kugoverwa kwakafanana kwekushisa mukati me stack uye inodzivirira kukuvara kwe membrane electrode kunokonzerwa nekupisa kwakanyanya munzvimbo.
Uyezve, graphite inopa hunhu hwakanaka hwekudzivirira gasi (hunogona kuwedzerwa kuburikidza nekuiswa mudumbu), zvichidzivirira kupinda kwehydrogen neokisijeni uye kuona kuti sisitimu yacho yakavimbika.
Zvisinei, kubva pamaonero einjiniya, graphite ine zvikanganiso zvakakura. Semuenzaniso, inopfava zvikuru, yakaoma kugadzirisa, uye inowanzoda ukobvu hwemamirimita akati wandei (>2–5 mm), izvo zvinotadzisa kuedza kuwana magadzirirwo ematanda akareruka uye ane simba rakawanda. Nekuda kweizvozvo, dzimwe nzira dze graphite dzakasanganiswa nesimbi dzave dziri kutsvagurudzwa zvishoma nezvishoma mumakore achangopfuura.
IV. Mafambiro Eindasitiri uye Maonero Eramangwana
Sezvo kutengeserana kwema fuel cell kuri kukurumidza, tekinoroji ye bipolar plate iri kushanduka nekukurumidza, nekuvandudzwa kwayo kuri pachena nekuda kwezvinhu uye kufambira mberi mukugadzira.
Kune rumwe rutivi, mumotokari dzinotakura vanhu uye kushandiswa kwesimba guru, indasitiri iri kuchinja zvishoma nezvishoma kubva pamaplate echinyakare egraphite bipolar kuenda kumaplate esimbi bipolar (akadai sesimbi isingatsvedzeri uye titanium alloys). Zvinhu izvi zvinogona kusvika pakukora kwe sub-millimeter, uye maitiro ekuisa stamping anoderedza zvakanyanya mari yekugadzira, nokudaro zvichizadzisa zvinodiwa pakugadzirwa kwezvinhu zvakawanda.
Kune rumwe rutivi, magirafu egirafiti akagadzirwa ne bipolar ari kubuda senzira huru yekuchinja. Nekushandisa ma conductive fillers akadai se resins nema carbon nanotubes, zvinhu izvi zvinogona kuchengetedza conductivity yemagetsi yakawanda uye kuramba ngura uku zvichivandudza simba remakanika uye kuderedza mari yekugadzirisa.
Panguva imwe chete, matekinoroji ekugadzira zvinhu epamusoro (akadai sekugadzira zvinhu zvinowedzera) ari kutungamira dhizaini yenzira dzekuyerera kwemaplate ebipolar kusvika pakuoma uye kushanda zvakanaka, nokudaro zvichiwedzera kushanda zvakanaka kwese uye kushandiswa kwesimba kwemaseru emafuta.
Nekufamba kwenguva, maplate e graphite bipolar acharamba achikwikwidzana munzvimbo dzinotevera:
● Masisitimu ekugadzira magetsi asingachinji (apo mutengo nehupenyu hwemagetsi zviri zvinhu zvakakosha)
● Mashandisirwo emagetsi akaderera kusvika pakati nepakati
● Alkaline kana mamiriro chaiwo ekushanda masisitimu emagetsi
Semugadziri anotungamira wekuChina uye mutengesi wemapurati e graphite bipolar, Ningbo VET Energy yakagadzira mapurati epamusoro e graphite bipolar ePEMFCs asingadhuri, anofambisa mhepo zvakanyanya, uye akasimba pakugadzira michina. VET Energy inopawo zvinhu zve graphite zvakaiswa mu resin kuti zvikwanise kupinda mugasi uye kusimba kwakasimba, ukuwo ichichengetedza graphite ine simba repamusoro remagetsi nekupisa.
Zvinonyanya kukosha,Simba reVETinotsigira zvinodiwa zvekugadzira graphite bipolar plate yakagadzirwa. Tinogona kugadzira machina kumativi ese emaplate kuti tigadzire nzira dzekuyerera, kugadzira divi rimwe chete, kana kupa maplate asina chinhu asina kugadzirwa. Maplate ese egraphite anogona kugadziriswa zvichienderana nezvamakatsanangura. Tinotarisira mibvunzo yenyu yakawanda.
Nguva yekutumira: Kubvumbi-10-2026