Počet záznamů: 1  

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

  1. 1.
    0477342 - UMCH-V 2018 RIV GB eng J - Článek v odborném periodiku
    Hnát, J. - Plevová, M. - Žitka, Jan - Paidar, M. - Bouzek, K.
    Anion-selective materials with 1,4-diazabicyclo[2.2.2]octane functional groups for advanced alkaline water electrolysis.
    Electrochimica acta. Roč. 248, 10 September (2017), s. 547-555. ISSN 0013-4686
    Grant CEP: GA ČR(CZ) GA16-20728S
    Institucionální podpora: RVO:61389013
    Klíčová slova: water electrolysis * alkaline environment * anion-selective membrane
    Kód oboru RIV: CG - Elektrochemie
    Obor OECD: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
    Impakt faktor: 5.116, rok: 2017

    In 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.
    Trvalý link: http://hdl.handle.net/11104/0273734