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Understanding Interface between Electrode and Electrolyte: Organic/Inorganic Hybrid Design for Fast Ion Conductivity
- Source :
- The Journal of Physical Chemistry C. 119:9169-9176
- Publication Year :
- 2015
- Publisher :
- American Chemical Society (ACS), 2015.
-
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 perf...
- Subjects :
- Chemistry
Inorganic chemistry
Electrolyte
Conductivity
Electrochemistry
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Dielectric spectroscopy
chemistry.chemical_compound
General Energy
Nafion
Proton transport
Electrode
Physical and Theoretical Chemistry
Ion transporter
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........3922223bf4b1d92f3fe06913db115574