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

Zhongkai Li; Mariolino Carta; Neil B. McKeown; Raphael E. Agbenyeke; Jean Charles Eloi; David J. Fermin; Omotayo A. Arotiba; Frank Marken

doi:10.1002/celc.202300807

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

Zhongkai Li, Mariolino Carta, Neil B. McKeown, Raphael E. Agbenyeke, Jean Charles Eloi, David J. Fermin, Omotayo A. Arotiba, Frank Marken

Chemical Sciences

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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.

Original language	English
Article number	e202300807
Journal	ChemElectroChem
Volume	11
Issue number	9
DOIs	https://doi.org/10.1002/celc.202300807
Publication status	Published - 2 May 2024

Keywords

brine
electroosmosis
ionic semiconductor
iontronics
seawater
voltammetry

ASJC Scopus subject areas

Catalysis
Electrochemistry

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10.1002/celc.202300807

Cite this

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title = "Molecular Structure Effects on Ionic Diode Performance in Desalination: Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM-EA-TB)",

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.",

keywords = "brine, electroosmosis, ionic semiconductor, iontronics, seawater, voltammetry",

author = "Zhongkai Li and Mariolino Carta and McKeown, {Neil B.} and Agbenyeke, {Raphael E.} and Eloi, {Jean Charles} and Fermin, {David J.} and Arotiba, {Omotayo A.} and Frank Marken",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors. ChemElectroChem published by Wiley-VCH GmbH.",

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doi = "10.1002/celc.202300807",

language = "English",

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T2 - Ultrahigh Rectification in Butylated Intrinsically Microporous Polyamine (PIM-EA-TB)

AU - Li, Zhongkai

AU - Carta, Mariolino

AU - McKeown, Neil B.

AU - Agbenyeke, Raphael E.

AU - Eloi, Jean Charles

AU - Fermin, David J.

AU - Arotiba, Omotayo A.

AU - Marken, Frank

PY - 2024/5/2

Y1 - 2024/5/2

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AB - 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.

KW - brine

KW - electroosmosis

KW - ionic semiconductor

KW - iontronics

KW - seawater

KW - voltammetry

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

Abstract

Keywords

ASJC Scopus subject areas

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