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Issue 7, 2016
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Capacitive deionization in organic solutions: case study using propylene carbonate

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Abstract

Capacitive deionization (CDI) is an emerging technology for the energy-efficient removal of dissolved ions from aqueous solutions. Expanding this technology to non-aqueous media, we present an experimental characterization of a pair of porous carbon electrodes towards electrosorption of dissolved ions in propylene carbonate. We demonstrate that application of CDI technology for treatment of an organic solution with an electrochemical stability window beyond 1.2 V allows for a higher salt removal capacity and higher charge efficiency as compared to CDI applied for treatment of aqueous electrolytes. Further, we show that using conductivity measurements of the stream emerging from the CDI cell combined with an equilibrium electric double-layer structure model, we can gain insights into charge compensation mechanisms and ion distribution in carbon nanopores.

Graphical abstract: Capacitive deionization in organic solutions: case study using propylene carbonate

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Publication details

The article was received on 07 Oct 2015, accepted on 05 Jan 2016 and first published on 08 Jan 2016


Article type: Paper
DOI: 10.1039/C5RA20786J
Citation: RSC Adv., 2016,6, 5865-5870
  • Open access: Creative Commons BY license
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    Capacitive deionization in organic solutions: case study using propylene carbonate

    S. Porada, G. Feng, M. E. Suss and V. Presser, RSC Adv., 2016, 6, 5865
    DOI: 10.1039/C5RA20786J

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