Yintoni i-graphite bipolar plate?

ipleyiti ye-bipolar yegraphiteyinxalenye ephambili esetyenziswa kwizixhobo ze-electrochemical ezifana neeseli ze-fuel kunye ne-electrolyzers, ngokuqhelekileyo zenziwe ngezinto ezicocekileyo zegraphite. Idlala indima ebalulekileyo kwiimpendulo ze-electrochemical, ikakhulu esetyenziselwa ukuqhuba okwangoku, ukusasaza iigesi zokusabela (ezifana ne-hydrogen kunye ne-oksijini), kunye neendawo zokusabela ezahlukileyo. Ngenxa yokuba amacala ayo amabini aqhagamshelana ne-anode kunye ne-cathode yeeseli ezikufutshane ezikufutshane, ezenza isakhiwo "se-bipolar" (elinye icala yi-anode flow field kunye nelinye icala yi-cathode flow field), ibizwa ngokuba yi-bipolar plate.

Ubume be graphite bipolar plate

Iipleyiti ze-bipolar zegraphite zihlala zinezi ndawo zilandelayo:
1. Flow Field: Umphezulu weplate ye-bipolar yenzelwe kunye nesakhiwo esiyinkimbinkimbi sentsimi yokusabalalisa ngokulinganayo igesi yokusabela (njenge-hydrogen, i-oksijeni okanye umoya) kwaye ikhuphe amanzi avelisiweyo.

2. Umaleko wokuqhuba: Izinto zegraphite ngokwazo zinokuqhuba kakuhle kwaye zinokuqhuba ngoku ngokufanelekileyo.

3. Indawo yokutywina: Imiphetho yeepleyiti ze-bipolar zidla ngokuyilwa kunye nezakhiwo zokutywina ukuthintela ukuvuza kwegesi kunye nokungena kolwelo.

4. Amajelo okupholisa (ukhetho): Kwezinye iinkqubo zokusebenza eziphezulu, iziteshi zokupholisa zinokuthi ziyilwe ngaphakathi kweeplate ze-bipolar ukulawula ubushushu bokusebenza kwesixhobo.

Imisebenzi yegraphite bipolar plates

1. Umsebenzi wokuqhuba:

Njengoko i-electrode yezixhobo ze-electrochemical, i-bipolar plate inoxanduva lokuqokelela kunye nokuqhuba okwangoku ukuqinisekisa ukuveliswa kwamandla ombane ngokufanelekileyo.
2. Ukuhanjiswa kwerhasi:

Ngokuyila umjelo wokuhamba, ipleyiti ye-bipolar isasaza ngokulinganayo irhasi yokusabela kwi-catalyst layer, ikhuthaza ukusabela kwe-electrochemical.
3. Ukwahlula iindawo zokusabela:

Kwi-fuel cell okanye i-electrolyzer, iiplate ze-bipolar zihlukanisa i-anode kunye neendawo ze-cathode, ukukhusela iigesi ekuxubeni.
4. Ukukhutshwa kobushushu kunye nokukhupha amanzi:

Iipleyiti ze-bipolar zinceda ukulawula ukushisa okusebenzayo kwesixhobo kunye nokukhupha amanzi okanye ezinye iimveliso eziveliswa yi-reaction.
5. Inkxaso yoomatshini:

Iiplati ze-bipolar zibonelela ngenkxaso yesakhiwo kwi-membrane electrode , ukuqinisekisa ukuzinza kunye nokuqina kwezixhobo.

Kutheni ukhetha igraphite njengesixhobo se-bipolar plate?

Iimpawu zezinto eziphathekayo zegraphite bipolar plates
●Ukuhanjiswa okuphezulu:

Isixa esikhulu sokumelana negraphite sisezantsi njenge-10-15μΩ.cm (ngcono kune-100-200 μΩ·cm yeipleyiti yensimbi ye-bipolar).

●Ukuchasa umhlwa:

Phantse akukho ukubola kwimeko ye-acidic yeeseli zepetroli (pH 2-3), kwaye ubomi benkonzo bunokufikelela ngaphezu kweeyure ezingama-20,000 .

●Khaphukhaphu:

Uxinzelelo malunga ne-1.8 g / cm3 (7-8 g / cm3 ye-metal bipolar plate), enenzuzo ekunciphiseni ubunzima kwizicelo zesithuthi.

●Ipropati yesithintelo segesi:

Ubume obuxineneyo begraphite bunokuthintela ngokufanelekileyo ukungena kwehydrogen kwaye inokhuseleko oluphezulu.

●Ukuqhubekeka lula:

Imathiriyeli yegraphite kulula ukuyiqhuba kwaye inokwenza ngokwezifiso uyilo lomjelo wokuqukuqela onzima kunye nobukhulu ngokweemfuno.

Zenziwa njani iipleyiti zegraphite bipolar?

Inkqubo yemveliso yeipleyiti yegraphite bipolaribandakanya oku kulandelayo:
●Ukulungiselela imathiriyeli ekrwada:

Sebenzisa ukucoceka okuphezulu (> 99.9%) igraphite yendalo okanye i-graphite powder eyenziwe.

Yongeza i-resin (efana ne-phenolic resin) njengesibophelelo sokwandisa amandla omatshini.

●Ukubunjwa koxinzelelo:

Izinto ezixubileyo zifakwe kwi-mold kwaye zicinezele phantsi kweqondo lokushisa eliphezulu (200-300 ℃) kunye noxinzelelo oluphezulu (> 100 MPa).

●Unyango lweGraphitization:

Ukufudumeza ukuya kuma-2500-3000℃ kwiatmosfera engasebenziyo kubangela ukuba izinto ezingezizo ikhabhoni ziguquke kwaye zenze ulwakhiwo olushinyeneyo lwegraphite.

●Ukuqhubekeka kwembaleki:

Sebenzisa oomatshini be-CNC okanye i-lasers ukukrola i-serpentine, i-parallel okanye i-interdigitated channels (ubunzulu 0.5-1 mm).

●Unyango lomphezulu:

I-impregnation kunye ne-resin okanye isinyithi (efana negolide, i-titanium) i-coating inciphisa ukuxhathisa ukudibanisa kunye nokuphucula ukuxhatshazwa kokugqoka.

Zeziphi iipleyiti zegraphite bipolar ezisetyenziswayo?

1. ISeli yeFuel:

-Iproton yotshintshiselwano nge-membrane yeseli yamafutha (PEMFC)

-ISeli yaBaso eSolid iOxide (SOFC)

-ISeli yeFuel yeMethanol ethe ngqo (DMFC)

2. Electrolyzer:

- Ukuveliswa kwe-Hydrogen nge-electrolysis yamanzi

- Ishishini leChlor-alkali

3. Inkqubo yokugcina amandla:

- Ibhetri ehambayo

4. Ishishini leMichiza:

- Electrochemical Reactor

5. Uphando lweLebhu:

-Uphuhliso lweprototype kunye novavanyo lweeseli zamafutha kunye ne-electrolyzers

Shwankathela

Iipleyiti zeGraphite bipolarzizinto ezingundoqo zezixhobo ze-electrochemical ezifana neeseli zamafutha kunye ne-electrolyzers, kwaye zinemisebenzi emininzi efana ne-conductivity, ukuhanjiswa kwegesi, kunye nokwahlulwa kweendawo zokusabela. Ngokuphuhliswa kobuchwepheshe bamandla acocekileyo, iiplati ze-graphite bipolar zisetyenziswa kakhulu kwizithuthi zamandla amatsha, iinkqubo zokugcina amandla, ukuveliswa kweekhemikhali ze-hydrogen kunye nezinye iindawo.