Studies on Anion Exchange Membrane and Interface Properties by Electrochemical Impedance Spectroscopy: The Role of pH.
anion exchange membrane
electrochemical impedance spectroscopy
pH value
tertiary amino groups
zeta potential
Journal
Membranes
ISSN: 2077-0375
Titre abrégé: Membranes (Basel)
Pays: Switzerland
ID NLM: 101577807
Informations de publication
Date de publication:
10 Oct 2021
10 Oct 2021
Historique:
received:
23
08
2021
revised:
05
10
2021
accepted:
06
10
2021
entrez:
22
10
2021
pubmed:
23
10
2021
medline:
23
10
2021
Statut:
epublish
Résumé
Ion-exchange membranes (IEMs) represent a key component in various electrochemical energy conversion and storage systems. In this study, electrochemical impedance spectroscopy (EIS) was used to investigate the effects of structural changes of anion exchange membranes (AEMs) on the bulk membrane and interface properties as a function of solution pH. The variations in the physico/electrochemical properties, including ion exchange capacity, swelling degree, fixed charge density, zeta potentials as well as membrane and interface resistances of two commercial AEMs and cation exchange membranes (CEMs, as a control) were systematically investigated in different pH environments. Structural changes of the membrane surface were analyzed by Fourier transform infrared and X-ray photoelectron spectroscopy. Most notably, at high pH (pH > 10), the membrane (R
Identifiants
pubmed: 34677537
pii: membranes11100771
doi: 10.3390/membranes11100771
pmc: PMC8540937
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : National Natural Science Foundation of China
ID : 52100011
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