Lim, Ahyoun Kim, Hyoung-juhn Henkensmeier, Dirk Yoo, Sung Jong Kim, Jin Young Lee, So Young Sung, Yung-Eun Jang, Jong Hyun Park, Hyun S. 2024-01-19T19:32:13Z 2024-01-19T19:32:13Z 2021-09-02 2019-08 1226-086X https://pubs.kist.re.kr/handle/201004/119715 Polymer electrolyte membrane water electrolysis has been proposed to address production of high purity hydrogen for storage of excess renewable energy. Among them, alkaline electrolyte membrane based water electrolysis (AEMWE) has an advantage in the aspect of material costs, e.g. from non-noble catalysts and membrane, but suffers from lower performance compared to proton exchange membrane based water electrolysis (PEMWE). However, there are fewer researches on single cell MEA and operation study compared to material research to enhance AEMWE performance. Here, we analyze the effect of the cell construction and operation factors, i.e MEA pressing, torque of cell assembly, electrolyte pre-feed methods, and operation temperature, to obtain high performance in AEMWE single cell operation. 97.5 % current improves at 1.8 V by applying optimized torque. 94 % decrease of ohmic resistance are achieved from electrolyte pre-feeding. 50 mA cm(-2) of current density is enhanced at 0.591 V of overvoltage per 10 degrees C temperature increase due to higher ionic conductivity and reaction kinetics. These factors significantly affect internal factors such as not only material property during operation but also, catalysts structure and contact in MEA, leading 4.3 times progress of current density from 0.242 to 1.045 A cm(-2) at 1.8 V-cell. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 A study on electrode fabrication and operation variables affecting the performance of anion exchange membrane water electrolysis Article 10.1016/j.jiec.2019.04.007 1 Journal of Industrial and Engineering Chemistry, v.76, pp.410 - 418 Journal of Industrial and Engineering Chemistry 76 410 418 N scie scopus kci ART002493012 000470939700037 2-s2.0-85064465791 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article OXYGEN EVOLUTION REACTION POLYMER ELECTROLYTE HYDROGEN-PRODUCTION FUEL-CELLS ELECTROCATALYSTS IONOMER CONDUCTIVITY DEGRADATION TRANSPORT FE Anion exchange membrane water electrolysis membrane electrode assembly electrolyzer operation electrocatalysis