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Anion-selective materials with 1,4-diazabicyclo[2.2.2]octane functional groups for advanced alkaline water electrolysis

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    SYSNO ASEP0477342
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleAnion-selective materials with 1,4-diazabicyclo[2.2.2]octane functional groups for advanced alkaline water electrolysis
    Author(s) Hnát, J. (CZ)
    Plevová, M. (CZ)
    Žitka, Jan (UMCH-V) RID
    Paidar, M. (CZ)
    Bouzek, K. (CZ)
    Source TitleElectrochimica acta. - : Elsevier - ISSN 0013-4686
    Roč. 248, 10 September (2017), s. 547-555
    Number of pages9 s.
    Languageeng - English
    CountryGB - United Kingdom
    Keywordswater electrolysis ; alkaline environment ; anion-selective membrane
    Subject RIVCG - Electrochemistry
    OBOR OECDElectrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
    R&D ProjectsGA16-20728S GA ČR - Czech Science Foundation (CSF)
    Institutional supportUMCH-V - RVO:61389013
    UT WOS000409525300060
    EID SCOPUS85026731806
    AnnotationIn this study a novel alkaline polymer electrolyte membrane is presented, based on polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (PSEBS) functionalized by the 1,4-diazabicyclo[2.2.2]octane (DABCO) to be used as an electrode compartment separator as well as a catalytic layer binder in the alkaline water electrolysis process with the aim to reduce the concentration of KOH in the liquid electrolyte and to allow the construction of an efficient zero gap-type cell. This material was selected due to the promising properties of both individual components resulting from their molecular structure. The prepared membrane was thoroughly characterized with regard to its stability in an alkaline environment. The prepared membrane showed an ion-exchange capacity value of 0.76 mmol g-1dry membrane and ionic conductivity of 7.5 S m-1 at 30 °C. Excellent membrane durability was confirmed for a KOH concentration range up to 10 wt.% and temperature up to 50 °C. Subsequently, the polymer electrolyte was tested in a laboratory alkaline water electrolyser using 10 wt.% KOH as a circulating medium showing promising current density of 150 mA cm-2 at 40 °C. In a 150-hour experiment the PSEBS functionalized by DABCO manifested very good stability and high potential for optimization for this process as it showed no signs of chemical degradation.
    WorkplaceInstitute of Macromolecular Chemistry
    ContactEva Čechová, ; Tel.: 296 809 358
    Year of Publishing2018