Understanding Interface between Electrode and Electrolyte: Organic/Inorganic Hybrid Design for Fast Ion Conductivity

Title
Understanding Interface between Electrode and Electrolyte: Organic/Inorganic Hybrid Design for Fast Ion Conductivity
Authors
정동영정영훈김성민임주완이경제정남기신혜영김옥희김형준유성종성영은
Keywords
fuel cell; interface; MEA; electrolyte
Issue Date
2015-04
Publisher
The Journal of Physical Chemistry C
Citation
VOL 119, NO 17, 9169-9176
Abstract
Ion transport is an important issue in electrochemical-based energy conversion and storage devices. Ion transport at the interface of the electrode and electrolyte is critical for performance. However, there is little understanding of the interface phenomena based on ion transport properties. Here, the proton transport behavior in a Nafion membrane (electrolyte) and that of an ionomer in the catalyst layer (electrode/electrolyte interface) was investigated simultaneously by electrochemical impedance spectroscopy. Our study indicates that the proton transport behavior in the catalyst layer is different from that in membrane. To elucidate the interface phenomena, we analyzed the Nafion electrolyte and proton behavior by molecular dynamics (MD). On the basis of the MD results, we modified the catalyst with a hybrid of inorganic Pt catalyst and organic 3-mercaptopropionic acid to promote a positive interfacial reaction between the electrolyte and electrode, which resulted in improved proton transport and performance.
URI
http://pubs.kist.re.kr/handle/201004/49677
ISSN
19327447
Appears in Collections:
KIST Publication > Article
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