AEM yog rau qee qhov kev sib xyaw ntawm PEM thiab ib txwm siv diaphragm raws li lye electrolysis. Lub hauv paus ntsiab lus ntawm AEM electrolytic cell yog qhia nyob rau hauv daim duab 3. Ntawm cathode, dej yog txo kom tsim hydrogen thiab OH -. OH - ntws los ntawm lub diaphragm mus rau lub anode, qhov twg nws recombines los tsim oxygen.
Li et al. [1-2] kawm quaternized polystyrene thiab polyphenylene AEM high-performance dej electrolyzer, thiab cov txiaj ntsig tau pom tias qhov ceev tam sim no yog 2.7A / cm2 ntawm 85 ° C ntawm qhov hluav taws xob ntawm 1.8V. Thaum siv NiFe thiab PtRu / C raws li catalysts rau hydrogen ntau lawm, tam sim no qhov ceev tau txo qis mus rau 906mA / cm2. Chen et al. [5] tau kawm txog daim ntawv thov kev ua haujlwm siab uas tsis yog-noble hlau electrolytic catalyst hauv alkaline polymer zaj duab xis electrolyzer. NiMo oxides raug txo los ntawm H2/NH3, NH3, H2 thiab N2 gases ntawm qhov sib txawv kub los ua ke electrolytic hydrogen ntau lawm catalysts. Cov txiaj ntsig tau pom tias NiMo-NH3 / H2 catalyst nrog H2 / NH3 txo tau qhov ua tau zoo tshaj plaws, nrog qhov ceev tam sim no mus txog 1.0A / cm2 thiab lub zog hloov pauv ntawm 75% ntawm 1.57V thiab 80 ° C. Evonik Industries, raws li nws cov khoom siv hluav taws xob sib cais membrane uas twb muaj lawm, tau tsim cov khoom siv polymer patented rau siv hauv AEM electrolytic hlwb thiab tam sim no nthuav tawm cov membrane ntau lawm ntawm kab tsav. Cov kauj ruam tom ntej yog txhawm rau txheeb xyuas qhov kev ntseeg tau ntawm lub kaw lus thiab txhim kho cov roj teeb tshwj xeeb, thaum txhim kho kev tsim khoom.
Tam sim no, cov teeb meem tseem ceeb ntawm AEM electrolytic hlwb yog qhov tsis muaj kev ua haujlwm siab thiab alkaline tsis kam ntawm AEM, thiab cov hlau muaj txiaj ntsig electrocatalyst ua rau tus nqi tsim khoom siv electrolytic. Nyob rau tib lub sijhawm, CO2 nkag mus rau hauv cov yeeb yaj kiab ntawm tes yuav txo cov yeeb yaj kiab thiab electrode tsis kam, yog li txo qhov kev ua haujlwm ntawm electrolytic. Txoj kev loj hlob yav tom ntej ntawm AEM electrolyzer yog raws li hauv qab no: 1. Tsim AEM nrog siab conductivity, ion selectivity thiab ntev alkaline stability. 2. kov yeej qhov teeb meem ntawm tus nqi siab ntawm cov khoom siv hlau muaj txiaj ntsig, tsim cov catalyst yam tsis muaj cov hlau zoo nkauj thiab kev ua haujlwm siab. 3. Tam sim no, lub hom phiaj tus nqi ntawm AEM electrolyzer yog $ 20 / m2, uas yuav tsum tau txo los ntawm pheej yig raw cov ntaub ntawv thiab txo cov theem synthesis, thiaj li yuav txo tau tag nrho cov nqi ntawm AEM electrolyzer. 4. Txo cov ntsiab lus CO2 hauv electrolytic cell thiab txhim kho kev ua haujlwm ntawm electrolytic.
[1] Liu L,Kohl P.A. Anion ua ntau qhov thaiv copolymer nrog sib txawv tethered cations[J].Journal of Polymer Science Part A: Polymer Chemistry, 2018, 56(13): 1395 — 1403.
[2] Li D, Park EJ, Zhu W, et al. Highly quaternized polystyrene ionomers rau kev ua haujlwm siab anion pauv membrane dej electrolysers [J]. Xwm Txheej Zog, 2020, 5: 378 - 385.
Post lub sij hawm: Feb-02-2023