Xyoo 1966, General Electric Company tau tsim cov dej electrolytic cell raws li lub tswv yim proton conduction, siv polymer membrane ua electrolyte. PEM cells tau muag los ntawm General Electric hauv xyoo 1978. Tam sim no, lub tuam txhab tsim cov PEM cells tsawg dua, feem ntau vim nws cov hydrogen tsim tsawg, lub neej luv luv thiab cov nqi peev siab. Lub PEM cell muaj cov qauv bipolar, thiab kev sib txuas hluav taws xob ntawm cov cell yog ua los ntawm bipolar plates, uas ua lub luag haujlwm tseem ceeb hauv kev tso tawm cov pa roj tsim tawm. Lub anode, cathode, thiab membrane pawg tsim lub membrane electrode sib dhos (MEA). Lub electrode feem ntau yog tsim los ntawm cov hlau muaj nqis xws li platinum lossis iridium. Ntawm lub anode, dej yog oxidized los tsim cov pa oxygen, electrons thiab protons. Ntawm lub cathode, cov pa oxygen, electrons thiab protons tsim los ntawm lub anode ncig los ntawm daim nyias nyias mus rau cathode, qhov chaw uas lawv raug txo kom tsim cov pa hydrogen. Lub hauv paus ntsiab lus ntawm PEM electrolyzer tau qhia hauv daim duab.
PEM electrolytic cells feem ntau yog siv rau kev tsim cov hydrogen me me, nrog rau qhov siab tshaj plaws ntawm hydrogen tsim tawm txog li 30Nm3 / h thiab kev siv hluav taws xob ntawm 174kW. Piv nrog rau alkaline cell, qhov tseeb hydrogen tsim tawm ntawm PEM cell yuav luag npog tag nrho cov kev txwv. Lub PEM cell tuaj yeem ua haujlwm ntawm qhov ceev tam sim no siab dua li alkaline cell, txawm tias txog li 1.6A / cm2, thiab qhov ua haujlwm electrolytic yog 48% -65%. Vim tias cov zaj duab xis polymer tsis tiv taus qhov kub siab, qhov kub ntawm electrolytic cell feem ntau qis dua 80 ° C. Hoeller electrolyzer tau tsim cov thev naus laus zis zoo tshaj plaws rau cov electrolyzers me me PEM. Cov cell tuaj yeem tsim raws li qhov yuav tsum tau ua, txo cov hlau muaj nqis thiab ua rau lub zog ua haujlwm nce ntxiv. Qhov zoo tshaj plaws ntawm PEM electrolyzer yog tias cov hydrogen tsim tawm hloov pauv yuav luag sib xws nrog lub zog muab, uas yog qhov tsim nyog rau kev hloov pauv ntawm hydrogen thov. Hoeller cells teb rau 0-100% load ntsuas kev hloov pauv hauv vib nas this. Hoeller cov thev naus laus zis uas tau txais daim ntawv pov thawj tab tom raug kuaj xyuas kom paub tseeb, thiab qhov chaw kuaj yuav raug tsim los ntawm qhov kawg ntawm xyoo 2020.
Qhov huv ntawm hydrogen uas tsim los ntawm PEM cell tuaj yeem siab txog 99.99%, uas siab dua li ntawm cov alkaline cell. Tsis tas li ntawd, qhov tsis tshua muaj roj permeability ntawm polymer membrane txo qhov kev pheej hmoo ntawm kev tsim cov khoom sib xyaw ua ke, tso cai rau electrolyzer ua haujlwm ntawm qhov tam sim no qis heev. Qhov conductivity ntawm cov dej muab rau electrolyzer yuav tsum tsawg dua 1S / cm. Vim tias proton thauj hla polymer membrane teb sai rau kev hloov pauv hluav taws xob, PEM cell tuaj yeem ua haujlwm hauv ntau hom kev muab hluav taws xob. Txawm hais tias PEM cell tau raug lag luam, nws muaj qee qhov tsis zoo, feem ntau yog tus nqi peev txheej siab thiab tus nqi siab ntawm ob qho tib si membrane thiab cov hlau muaj nqis raws li electrodes. Tsis tas li ntawd, lub neej ua haujlwm ntawm PEM cell luv dua li ntawm alkaline cell. Yav tom ntej, lub peev xwm ntawm PEM cell los tsim hydrogen yuav tsum tau txhim kho zoo heev.
Lub sijhawm tshaj tawm: Lub Ob Hlis-02-2023