Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM‐EA‐TB)

Autor: Zhongkai Li, Mariolino Carta, Neil B. McKeown, Raphael E. Agbenyeke, Jean‐Charles Eloi, David J. Fermin, Omotayo A. Arotiba, Frank Marken
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: ChemElectroChem, Vol 11, Iss 9, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 2196-0216
DOI: 10.1002/celc.202300807
Popis: Abstract Ionic diodes are components in ionic circuits for AC‐electricity driven desalination and ion extraction processes. Independent of the ionic diode type/mechanism, achieving ionic current rectification at high ionic strengths is challenging but important, for example in seawater desalination and treatment of brine. Here, the butylation of a molecularly rigid (glassy) polymer of intrinsic microporosity (PIM‐EA‐TB) is shown to give anionic diodes with ultrahigh rectification effects (associated with interfacial resistivity) even in high ionic strength aqueous 2 M NaCl solution. The effect is rationalised based on polymer structure affecting ion transport.
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