아스리딘 다얀 Muhammad Luthfi Akbar Trisno Yang Chaeyeon Kraglund, Mikkel Rykær Almind, Mads Radmer Hjelm, Johan Jensen, Jens Oluf Aili, David Park, Hyun S. Henkensmeier, Dirk 2024-01-12T06:31:42Z 2024-01-12T06:31:42Z 2023-10-27 2023-12 1614-6832 https://pubs.kist.re.kr/handle/201004/79713 While anion exchange membrane (AEM) water electrolysis has many advantages, its commercialization is impeded by the low alkaline stability of most AEM, due to the fragility of quaternary ammonium groups. Ion solvating membranes (ISM) can be an alternative, but so far require high alkaline concentrations. Here, it is shown that sulfonation of polybenzimidazole results in ISM which swell strongly in 1 m KOH. Crosslinking with dibromoxylene controls the swelling, and after activation conductivities of >100 mS cm？1 can be reached in 1 m KOH. Stability in 1 m KOH at 80 °C is excellent: Conductivity remains unchanged and tensile strength and Young's modulus remains high over the test period of a half year. In an electrolyzer operating with 1 m KOH feed solution at 80 °C, a stable performance is achieved for over 500 h test without failure, suggesting that the high alkaline stability observed in ex situ tests is also achieved in the electrolyzer. English Wiley-VCH Verlag Quaternary Ammonium-Free Membranes for Water Electrolysis with 1 m KOH Article 10.1002/aenm.202302966 1 Advanced Energy Materials, v.13, no.46 Advanced Energy Materials 13 46 N scie scopus 001093590200001 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article DOPED POLYBENZIMIDAZOLE POLYMER ELECTROLYTE EXCHANGE MEMBRANES STABILITY alkaline stability ion solvating membranes lifetime sulfonated para-PBI water electrolysis