PEM thiab AEM yog xa mus rau ob hom electrolytes uas siv hauv roj hlwb. PEM stands rau Proton Exchange Membrane, thaum AEM stands rau Anion Exchange Membrane.
Qhov sib txawv tseem ceeb ntawm PEM thiab AEM yog cov ion uas lawv thauj. PEMs thauj protons, thaum AEMs thauj anions. Hauv PEM roj cell, cov roj hydrogen tau dhau los ntawm platinum catalyst, uas faib cov hydrogen molecules rau hauv protons thiab electrons. Lub PEM tso cai rau tsuas yog protons dhau mus, thaum lub electrons raug yuam kom ntws los ntawm sab nraud Circuit Court, tsim hluav taws xob. Ntawm qhov tod tes, hauv AEM roj cell, cov pa oxygen tau dhau los ntawm cov catalyst, uas tsim cov hydroxide ions. AEM tso cai rau tsuas yog hydroxide ions dhau mus, thaum lub sij hawm zoo ions raug yuam kom ntws los ntawm ib qho hluav taws xob sab nraud, tsim hluav taws xob.
Lwm qhov sib txawv ntawm PEM thiab AEM yog lawv cov haujlwm ua haujlwm. PEMs xav tau qhov kub thiab txias (nyob ib ncig ntawm 80-100 degree) thiab qhov chaw ntub dej kom ua haujlwm zoo. AEMs, ntawm qhov tod tes, tuaj yeem ua haujlwm ntawm qhov kub siab dua (txog 120-150 degree) thiab tsis tas yuav muaj qhov chaw ntub dej.
Hais txog kev ua tau zoo, PEMs muaj lub zog ntau dua thiab ua haujlwm zoo dua li AEMs, tab sis lawv kuj tseem kim dua los tsim khoom. AEMs, ntawm qhov tod tes, yog pheej yig dua los tsim tab sis muaj kev ua haujlwm qis dua.
Zuag qhia tag nrho, kev xaiv ntawm PEM thiab AEM yog nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov roj cell. PEMs feem ntau siv rau hauv kev siv tsheb, thaum AEMs feem ntau siv rau hauv cov ntawv thov nyob ruaj ruaj, xws li cov tshuab hluav taws xob thaub qab rau cov tsev.
