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Three-dimensional hexagonal GDC interlayer for area enhancement of low-temperature solid oxide fuel cells

Title
Three-dimensional hexagonal GDC interlayer for area enhancement of low-temperature solid oxide fuel cells
Author
김영범
Keywords
Solid oxide fuel cell; 3-D nanostructuring; Gadolinium-doped ceria; Functional layer
Issue Date
2015-10
Publisher
ELSEVIER SCIENCE SA
Citation
SURFACE & COATINGS TECHNOLOGY, v. 279, Page. 54-59
Abstract
A three-dimensional hexagonal gadolinium-doped ceria (GDC) interlayer is fabricated to enhance the cathodic surface area of low-temperature solid oxide fuel cells (LT-SOFCs). By using modified nanosphere lithography method, 3-D nanostructure is successfully fabricated. As a result of the nanostructuring, the 3-D hexagonal GDC interlayer has a 70% increase in cathodic surface area. Electrochemical impedance spectroscopy reveals a 2-fold decrease in the electrode resistance compared with a plane cell, resulting in a current-voltage behavior with a 60% higher peak power density. The superior electrode reaction is attributed to the large surface area (similar to 1.7 times larger) due to the 3-D hexagonal cathodic interlayer. This novel fabrication method can be applied to almost all kinds of LT-SOFC structures, including large-scale and substrate-supported platforms, and thereby it will contribute to commercializing LT-SOFCs. (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0257897215301717?via%3Dihubhttp://hdl.handle.net/20.500.11754/28194
ISSN
0257-8972
DOI
10.1016/j.surfcoat.2015.07.066
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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