Ordered macroporous platinum electrode and enhanced mass transfer in fuel cells using inverse opal structure

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Three-dimensional, ordered macroporous materials such as inverse opal structures are attractive materials for various applications in electrochemical devices because of the benefits derived from their periodic structures: relatively large surface areas, large voidage, low tortuosity and interconnected macropores. However, a direct application of an inverse opal structure in membrane electrode assemblies has been considered impractical because of the limitations in fabrication routes including an unsuitable substrate. Here we report the demonstration of a single cell that maintains an inverse opal structure entirely within a membrane electrode assembly. Compared with the conventional catalyst slurry, an ink-based assembly, this modified assembly has a robust and integrated configuration of catalyst layers; therefore, the loss of catalyst particles can be minimized. Furthermore, the inverse-opal-structure electrode maintains an effective porosity, an enhanced performance, as well as an improved mass transfer and more effective water management, owing to its morphological advantages.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2013-09
Language
English
Article Type
Article
Citation

NATURE COMMUNICATIONS, v.4

ISSN
2041-1723
DOI
10.1038/ncomms3473
URI
http://hdl.handle.net/10203/297232
Appears in Collection
CBE-Journal Papers(저널논문)
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