Choi, Juyeon Kim, Hansoo Jeon, Sungkwon Lee, Myung-Seok Nam, Yujin Park, Young Sang An, Si Eon Kim, Minjoong Lee, Changsoo Park, Hosik Cho, Hyun-Seok Lee, Albert S. Lee, Jung-Hyun 2025-09-22T02:30:15Z 2025-09-22T02:30:15Z 2025-09-16 2025-10 1613-6810 https://pubs.kist.re.kr/handle/201004/153205 Anion exchange membrane (AEM) water electrolysis (AEMWE) is considered an economical technology for producing green hydrogen energy. However, conventional AEMs comprising polymer backbones with anisotropically aligned cationic pendant groups exhibit unsatisfactory AEMWE performance and durability, limiting their practical implementation. Herein, a facile method for fabricating a durable high-performance AEM via a one-pot monomer-level Menshutkin (m-Men) reaction in a porous mechanical support is proposed. The rationally designed m-Men reaction between multifunctional alkyl halide and tertiary amine monomers creates a highly crosslinked polymer network with isotropically interconnected, high-density cationic groups. This unique structure is favorable for expediting anion conduction within the membrane and enhancing thermochemical robustness. The resultant membrane exhibits unprecedentedly high AEMWE performance with both non-platinum-group metal (PGM) and full-PGM electrodes at 5 wt.% potassium hydroxide and 80 degrees C, outperforming commercial state-of-the-art AEMs, with ensuring long-term operation. The proposed strategy provides a breakthrough approach for fabricating advanced membranes for various energy applications. English Wiley - V C H Verlag GmbbH & Co. One-Pot Monomer-Level Fabrication of Anion Exchange Membranes for High-Performance Water Electrolysis Article 10.1002/smll.202504491 1 Small, v.21, no.41 Small 21 41 N scie scopus 001559853600001 2-s2.0-105014622594 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article QUATERNARY AMMONIUM CATIONS CONDUCTIVITY STABILITY anion exchange membrane hydrogen production Menshutkin reaction quaternary ammonium water electrolysis