Hu, Chuan Lee, Young Jun Ma, Yichang Zhang, Xiaohua Jung, Seung Won Hwang, Hyewon Cho, Hyeon Keun Kim, Myeong-Geun Yoo, Sung Jong Zhang, Qiugen Lee, Young Moo 2024-03-21T07:30:13Z 2024-03-21T07:30:13Z 2024-03-21 2024-03 2380-8195 https://pubs.kist.re.kr/handle/201004/149496 Rational design of membrane electrode assemblies is crucial to the production of high-performance and durable anion exchange membrane (AEM) water electrolyzers (AEMWEs). Here, we propose a facile method to prepare patterned membranes by casting a polymer solution onto the surface of commercially available monocrystalline silicon plates with pyramid-shaped patterns on their surface. The prepared membrane shows a 39% improvement in water permeability and a 23% enhancement in the electrochemical surface area compared with a flat membrane with the same catalyst loading. The patterned AEM achieves an unprecedented current density of 17.5 A cm(-2)@2.0 V and mass activity of 26.3 A mg(IrO2)(-1) using a catalyst-coated membrane method. Moreover, the patterned AEM-based AEMWE can be operated at 1.5 A cm(-2) and 60 degrees C for 1000 h with a relatively low voltage decay rate of 22 mu V h(-1). These results demonstrate that patterned membranes have promising application capability for the next generation of hydrogen-production devices. English American Chemical Society Advanced Patterned Membranes for Efficient Alkaline Membrane Electrolyzers Article 10.1021/acsenergylett.4c00207 1 ACS Energy Letters, v.9, no.3, pp.1219 - 1227 ACS Energy Letters 9 3 1219 1227 Y scie scopus 001177517800001 2-s2.0-85186485725 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article ANION-EXCHANGE MEMBRANES WATER PERFORMANCE