화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.76, 410-418, August, 2019
DOI10.1016/j.jiec.2019.04.007  Export Citation
A study on electrode fabrication and operation variables affecting the performance of anion exchange membrane water electrolysis
Ahyoun Lim1, 2, Hyoung-juhn Kim1, 3, Dirk Henkensmeier1, 3, Sung Jong Yoo1, 3, Jin Young Kim1, 3, So Young Lee1, Yung-Eun Sung2, Jong Hyun Jang1, 3, †, and Hyun S. Park1, 3, †
  • 1Center for Hydrogen Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
  • 2School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
  • 3Division of Energy & Environment Technology, KIST School, University of Science and Technology (UST), Seoul 02792, Republic of Korea
E-mail:,
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 °C temperature increasedue to higherionic conductivityandreaction kinetics.Thesefactorssignificantlyaffect 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 Vcell.
Keywords:Anion exchange membrane water;electrolysis;membrane electrode assembly;electrolyzer operation;electrocatalysis
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