Factors in electrode fabrication for performance enhancement of anion exchange membrane water electrolysis

Title
Factors in electrode fabrication for performance enhancement of anion exchange membrane water electrolysis
Authors
김형준장종현헨켄스마이어디억유성종김진영박현서이소영박희영조민경최승회성영은
Keywords
Anion exchange membrane water; electrolysis; Membrane electrode assembly; Polytetrafluoroethylene; Hot-pressing; Binder content
Issue Date
2017-04
Publisher
Journal of power sources
Citation
VOL 347-290
Abstract
To improve the cell performance for alkaline anion exchange membrane water electrolysis (AEMWE), the effects of the amount of polytetrafluoroethylene (FIFE) non-ionomeric binder in the anode and the hot pressing conditions during the fabrication of the membrane electrode assemblies (MEAs) on cell performances are studied. The electrochemical impedance data indicates that hot-pressing at 50 degrees C for 1 min during MEA construction can reduce the polarization resistance of AEMWE by similar to 12%, and increase the initial water electrolysis current density at 1.8 V (from 195 to 243 mA cm(-2)). The electrochemical polarization and impedance results also suggest that the AEMWE performance is significantly affected by the content of PTFE binder in the anode electrode, and the optimal content is found to be 9 wt% between 5 and 20 wt%. The AEMWE device fabricated with the optimized parameters exhibits good water splitting performance (299 mA cm(-2) at 1.8 V) without noticeable degradation in voltage cycling operations.
URI
http://pubs.kist.re.kr/handle/123456789/64610
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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