001037739 001__ 1037739
001037739 005__ 20250203103127.0
001037739 0247_ $$2doi$$a10.1149/MA2023-02391889mtgabs
001037739 0247_ $$2ISSN$$a1091-8213
001037739 0247_ $$2ISSN$$a2151-2043
001037739 037__ $$aFZJ-2025-00899
001037739 082__ $$a540
001037739 1001_ $$0P:(DE-HGF)0$$aBoström, Oskar$$b0
001037739 1112_ $$a244th ECS Meeting$$cGothenburg$$d2023-10-08 - 2023-10-12$$wSweden
001037739 245__ $$a(Poster Award - Honorable Mention) Durable Polybenzimidazole Anion Exchange Membranes for Alkaline Water Electrolyzers
001037739 260__ $$c2023
001037739 3367_ $$0PUB:(DE-HGF)1$$2PUB:(DE-HGF)$$aAbstract$$babstract$$mabstract$$s1737473365_4205
001037739 3367_ $$033$$2EndNote$$aConference Paper
001037739 3367_ $$2BibTeX$$aINPROCEEDINGS
001037739 3367_ $$2DRIVER$$aconferenceObject
001037739 3367_ $$2DataCite$$aOutput Types/Conference Abstract
001037739 3367_ $$2ORCID$$aOTHER
001037739 520__ $$aWater electrolysis under alkaline conditions allows the use of inexpensive non-platinum-group catalysts such as nickel.1, 2 Conventional alkaline electrolyzers usually employ a highly concentrated aq. KOH solution as electrolyte (5-7 M) with a porous diaphragm as separator. Alternatively, protolysable polymers such as polybenzimidazole (PBI) may be swollen with electrolyte and used as ion-solvating membranes.2, 3 However, the chemical stability of the polymers can become a serious issue under these harsh conditions. Operation under more dilute conditions, e.g., up to 2 M KOH, may bring the benefits of the alkaline conditions combined with a longer cell lifetime. Under these conditions, aliphatic cyclic quaternary ammonium (QA) cations, such as piperidinium, have shown excellent stability.In the present work, performed as part of the EU project "NEXTAEC", we have designed and synthesized m-PBI grafted with mono- and bis-piperidinium functionalized side chains, respectively (Figure 1a-b). AEMs were prepared from polymers with varying ion exchange capacities and studied at 80 °C containing KOH solutions in the concentration range 0.5-2 M KOH. The membranes were characterized with respect to, e.g., electrolyte solution uptake, alkaline stability, and electrolyser performance (Figure 1c). The uptake showed a strong inverse correlation with KOH concentration, which also affected the electrochemical performance. The stability as evaluated by 1HNMR spectroscopy was excellent showing, in the worst case, less than 8 % ionic loss after 6 months storage in 2 M KOH at 80 °C.
001037739 536__ $$0G:(DE-HGF)POF4-1231$$a1231 - Electrochemistry for Hydrogen (POF4-123)$$cPOF4-123$$fPOF IV$$x0
001037739 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de
001037739 7001_ $$0P:(DE-HGF)0$$aChoi, Seung-Young$$b1
001037739 7001_ $$0P:(DE-Juel1)175127$$aXia, Lu$$b2
001037739 7001_ $$0P:(DE-Juel1)176513$$aLohmann-Richters, Felix$$b3$$ufzj
001037739 7001_ $$0P:(DE-HGF)0$$aJannasch, Patric$$b4
001037739 773__ $$0PERI:(DE-600)2438749-6$$a10.1149/MA2023-02391889mtgabs$$gVol. MA2023-02, no. 39, p. 1889 - 1889$$x2151-2043$$y2023
001037739 909CO $$ooai:juser.fz-juelich.de:1037739$$pVDB
001037739 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)176513$$aForschungszentrum Jülich$$b3$$kFZJ
001037739 9131_ $$0G:(DE-HGF)POF4-123$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1231$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vChemische Energieträger$$x0
001037739 9141_ $$y2024
001037739 920__ $$lyes
001037739 9201_ $$0I:(DE-Juel1)IEK-14-20191129$$kIEK-14$$lElektrochemische Verfahrenstechnik$$x0
001037739 9201_ $$0I:(DE-Juel1)IET-4-20191129$$kIET-4$$lElektrochemische Verfahrenstechnik$$x1
001037739 980__ $$aabstract
001037739 980__ $$aVDB
001037739 980__ $$aI:(DE-Juel1)IEK-14-20191129
001037739 980__ $$aI:(DE-Juel1)IET-4-20191129
001037739 980__ $$aUNRESTRICTED