I-Metal Foam-I-Fuel Cell Cold Start Performance Enhancement

Kwezorhweboamagwebu esinyithiokwangoku ziyindlela elungileyo enokubakho kwiimbaleki zesiqhelo zeeseli zamafutha ngenxa ye-microstructure yazo eneporous, i-porosity ephezulu, kunye namandla alungileyo oomatshini.
Okokuqala, ukusebenza kwe-polarization yebhetri phantsi kweemeko eziqhelekileyo zokusebenza kwiqondo lokushisa lokushisa kwahlaziywa. Ukuqwalasela ukuba i-cathode yi-electrode ephambili ethintela ukusebenza kwebhetri, iindlela zokuhamba eziqhelekileyo ezihambelanayo zisetyenziselwa i-anode yeeseli zombini enye, kunye neendlela eziqhelekileyo ezihambelanayo ezihambayo zisetyenziselwa i-cathode kunye ne-nickel-metal foam flow field, ngokulandelanayo.
Ukubonisa ngokucacileyo umahluko wokuhamba kunye nokwahluka kokusebenza kwimimandla emibini yokuhamba, isifundo sisebenzise ibala lokuhamba kweeseli ezibhityileyo kunye nobukhulu be-1.5 cm × 20 cm (iigesi zonke zahamba ecaleni kwexesha elide), ethe yalahlekelwa yiseli yokuqala. ukusebenza, kwaye ke, ukusebenza kwe-cell polarization kwakungekho phezulu. Ukongeza, i-MEA efanayo (Nafion-112) yayisetyenziselwa zombini iiseli kuvavanyo. Ngenxa yokugoba okuphezulu komjelo omncinci wokuhamba kumhlaba wokuhamba kwesinyithi, ukuhla koxinzelelo kuzo zombini iziphelo kuphezulu xa kuthelekiswa nomjelo olula othe tye othe tye kwindawo yokuhamba eqhelekileyo, eyandisa unikezelo lwegesi kwi-cathode, ukusebenza. uxinzelelo, kunye nesantya sokusabela kwe-electrochemical, kwaye kwangaxeshanye, kufuneka isebenzise amandla enjini yegesi ecinezelekileyo ukuya kwinqanaba elithile kwaye inyuse ilahleko yokumpompa. Ubuninzi bamandla obuphezulu buphezulu kwiiseli ezineigwebu lesinyithiamasimi okugeleza, ngelixa kwimisinga ephantsi, uxinano lwamandla lungaphantsi kancinane kunolo lweeseli ze-flow flow field. Ngokubanzi, iingenelo zokusebenzisa i-metal foam flow field zisabalulekile. Ekuhambeni kwexesha, ngenxa yerhasi efanayo kunye nokuhamba kwamanzi olwelo kwibala lokuhamba kwesinyithi sogwebu, indawo yokuqukuqela emfutshane inokusetyenziswa kwimisebenzi eyenziwayo, okanye ukusetyenziswa kwecathode kunye ne-anode ethe nkqo yonikezelo olunqamlezayo (igesi ye-anode ihamba ecaleni kwendlela. icala elide lomjelo wokuqukuqela wemveli, irhasi yecathode iqukuqela kwicala elifutshane lendawo yokuqukuqela ugwebu), nto leyo inciphisa ngakumbi ilahleko yokumpompa ebangelwa yicathode yokungena kunye nokuphuma koxinzelelo lokuphuma, kwaye ke kulindeleke ukuba ukuqonda ukomelezwa kokusebenza kwebhetri, kwaye nokugcina amandla athelekisekayo okanye aphezulu ngakumbi kunejelo lokuqukuqela eliqhelekileyo, elinokuzuzwa ekuhambeni kwexesha. Ke ngoko, kulindeleke ukuba iqonde ukuphuculwa kokusebenza kweeseli ngelixa igcina ilahleko yokumpompa ethelekiseka okanye engaphantsi kunaleyo yomjelo wokuqukuqela oqhelekileyo.
Kwelinye icala, ukujongana nenkxalabo yeemeko zokuqala ezingaphantsi kwe-zero, sithelekisa ngokubanzi ukusebenza okuguquguqukayo kokuqalisa kweeseli zepetroli kunye nebala lokuhamba kwesinyithi esinogwebu kunye nejelo lokuhamba eliqhelekileyo elihambelanayo kwi-cathode phantsi kweendlela zangoku kunye nezingatshintshiyo zombane, ngokulandelanayo.
Kwelinye icala, kwimeko edumileyo yokuqalisa i-sub-zero, sithelekisa ngokubanzi ukusebenza okuguquguqukayo kokuqalisa kweeseli zepetroli kunye nebala lokuhamba kwesinyithi esinogwebu kunye nejelo lokuhamba eliqhelekileyo elihambelanayo kwi-cathode phantsi kweemowudi zangoku kunye nezingatshintshiyo zombane, ngokulandelelanayo.
Intsimi ye-foam-metal flow flow ibonakalisa iingenelo ezigqwesileyo, ngokusebenza kweeseli ezizinzile ngexesha lokuqalisa kunye nokuqaliswa ngempumelelo, ngelixa ngokuchaseneyo, iseli yeshaneli eqhelekileyo ehambelanayo, ene-voltage esezantsi kunye engazinzanga yeseli ngexesha lokusebenza, iphucula izinga lokuvelisa ubushushu kunye nobushushu. izinga lokunyuka ukuya kumlinganiselo othile, kodwa ngenxa yeendlela ezimbalwa zokuhamba, ukwenzeka kwe-icing kunye nokuvala ukunyuka ngokulandelelana (kuxhomekeke kwinani leendlela zokuhamba), okukhokelela ekusebenzeni kwemveliso yeseli eguquguqukayo. amathuba okuvala umkhenkce ayanda ngokulandelelana (kuxhomekeke kwinani leetshaneli zokuqukuqela), okukhokelela ekusebenzeni okuguquguqukayo kwemveliso yeeseli kunye nokunyuka kwamathuba okusilela ukuqalisa.
Isishwankathelo, isakhiwo esigqwesileyo se-porous yeseli yamafutha ngeisinyithi sogwebuindawo yokuhamba ineenzuzo ezibalulekileyo ngaphezu kweseli kunye nomjelo wesiqhelo "we-trench-ridge" phantsi kwenkqubo yokushisa kwegumbi kunye neemeko zokuqalisa ezingaphantsi kwe-zero.
Ubuninzi bamandla obuninzi kunye noxinano lokugqibela lwangoku lwebhetri kwiqondo lobushushu begumbi lonyuka malunga ne-25%;
Ngaphantsi kweemeko zokuqala ze-sub-zero, ukusebenza kweebhetri ezine-foam metal flow field zihamba kakuhle ngexesha lokuqala, kwaye iqondo lokushisa eliphantsi lokuziqalisa liphuculwe kakhulu.
Ukongeza, ukusetyenziswa konyango olongezelelekileyo lwezixhobo zetsimbi yogwebu, njengokutyalwa kwegolide ukunyusa umgangatho we-conductivity, i-hydrophobicity efanelekileyo kunye nonyango lokumelana nomhlwa, kunye nokusetyenziswaizixhobo zogwebungobungakanani obuphuculweyo bepore, iporosity, kunye nereyishini yoxinzelelo, kulindeleke ukuba yomeleze ngakumbi ukusebenza kweseli yamafutha kwaye yandise ukuqina komjikelo wokuqalisa ukubanda.