Cho, Min Kyung Park, Hee-Young Lee, Hye Jin Kim, Hyoung-Juhn Lim, Ahyoun Henkensmeier, Dirk Yoo, Sung Jong Kim, Jin Young Lee, So Young Park, Hyun S. Jang, Jong Hyun 2024-01-19T23:03:22Z 2024-01-19T23:03:22Z 2021-09-03 2018-04 0378-7753 https://pubs.kist.re.kr/handle/201004/121566 Herein, we investigate the effects of catholyte feed method and anode binder content on the characteristics of anion exchange membrane water electrolysis (AEMWE) to construct a high-performance electrolyzer, revealing that the initial AEMWE performance is significantly improved by pre-feeding 0.5 M aqueous KOH to the cathode. The highest long-term activity during repeated voltage cycling is observed for AEMWE operation in the dry cathode mode, for which the best long-term performance among membrane electrode assemblies (MEAs) featuring polytetrafluoroethylene (PTFE) binder-impregnated (5-20 wt%) anodes is detected for a PTFE content of 20 wt%. MEAs with low PTFE content (5 and 9 wt%) demonstrate high initial performance, rapid performance decay, and significant catalyst loss from the electrode during long-term operation, whereas the MEA with 20 wt % PTFE allows stable water electrolysis for over 1600 voltage cycles. Optimization of cell operating conditions (i.e., operation in dry cathode mode at an optimum anode binder content following an initial solution feed) achieves an enhanced water splitting current density (1.07 A cm(-2) at 1.8 V) and stable long-term AEMWE performance (0.01% current density reduction per voltage cycle). English ELSEVIER SCIENCE BV Alkaline anion exchange membrane water electrolysis: Effects of electrolyte feed method and electrode binder content Article 10.1016/j.jpowsour.2018.02.025 1 JOURNAL OF POWER SOURCES, v.382, pp.22 - 29 JOURNAL OF POWER SOURCES 382 22 29 N scie scopus 000430622700003 2-s2.0-85042198068 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article HYDROGEN-PRODUCTION IONOMER CONTENT CARBON NANOTUBES CATALYST LAYER PERFORMANCE POLYMER CELL ELECTROCATALYSTS OPTIMIZATION TECHNOLOGIES Alkaline anion exchange membrane water electrolysis Electrolyte feed method Membrane electrode assembly Binder content