Khalid, Hamza Plevova, Michaela Bui, Trung Tuyen Najibah, Malikah Hnat, Jaromir Bouzek, Karel Henkensmeier, Dirk 2024-05-30T01:00:05Z 2024-05-30T01:00:05Z 2024-05-29 2024-10 1613-6810 https://pubs.kist.re.kr/handle/201004/149942 In anion exchange membrane (AEM) water electrolyzers, AEMs separate hydrogen and oxygen, but should efficiently transport hydroxide ions. In the electrodes, catalyst nanoparticles are mechanically bonded to the porous transport layer or membrane by a polymeric binder. Since these binders form a thin layer on the catalyst particles, they should not only transport hydroxide ions and water to the catalyst particles, but should also transport the nascating gases away. In the worst case, if formation of gases is >> than gas transport, a gas pocket between catalyst surface and the binder may form and hinder access to reactants (hydroxide ions, water). In this work, the ion conductive binder SEBS-DABCO is blended with PIM-1, a highly permeable polymer of intrinsic microporosity. With increasing amount of PIM-1 in the blends, the permeability for water (selected to represent small molecules) increases. Simultaneously, swelling and conductivity decrease, due to the increased hydrophobicity. Ex situ data and electrochemical data indicate that blends with 50% PIM-1 have better properties than blends with 25% or 75% PIM-1, and tests in the electrolyzer confirm an improved performance when the SEBS-DABCO binder contains 50% PIM-1. English Wiley - V C H Verlag GmbbH & Co. Microporous Electrode Binders for Anion Exchange Membrane Water Electrolyzers Article 10.1002/smll.202401592 1 Small, v.20, no.40 Small 20 40 N scie scopus 001435362200047 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article PIM-1 SEBS-DABCO gas permeability anion exchange membrane water electrolyzer hydroxide conducting ionomer binder