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Understanding interface between electrode and electrolyte: Organic/inorganic hybrid design for fast ion conductivity

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Title
Understanding interface between electrode and electrolyte: Organic/inorganic hybrid design for fast ion conductivity
Author(s)
Dong Young Chung; Chung Y.-H.; Kim S.; Lim J.W.; Kyung Jae Lee; Jung N.; Shin H.; Kim O.-H.; Kim H.; Yoo S.J.; Yung-Eun Sung
Publication Date
2015-04
Journal
JOURNAL OF PHYSICAL CHEMISTRY C, v.119, no.17, pp.9169 - 9176
Publisher
AMER CHEMICAL SOC
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. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2058
ISSN
1932-7447
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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