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

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Title
Ordered macroporous platinum electrode and enhanced mass transfer in fuel cells using inverse opal structure
Author(s)
Ok-Hee Kim; Cho, Yong-Hun; Kang, Soon Hyung; Hee-Young Park; Minhyoung Kim; Ju Wan Lim; Dong Young Chung; Myeong Jae Lee; Choe, Heeman; Yung Eun Sung
Publication Date
2013-09
Journal
NATURE COMMUNICATIONS, v.4, no., pp.2473 -
Publisher
NATURE PUBLISHING GROUP
Abstract
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.
URI
http://pr.ibs.re.kr/handle/8788114/1263
DOI
10.1038/ncomms3473
ISSN
2041-1723
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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