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Heterogeneous nanograin structured NiO-YSZ anodes via a water-in-oil microemulsion route for solid oxide fuel cells

Title
Heterogeneous nanograin structured NiO-YSZ anodes via a water-in-oil microemulsion route for solid oxide fuel cells
Authors
Rath, Manasa K.Jung, Yong MinPark, Jeong HwaJoh, Dong WooLee, Kang Taek
DGIST Authors
Rath, Manasa K.; Jung, Yong Min; Park, Jeong Hwa; Joh, Dong Woo; Lee, Kang Taek
Issue Date
2017
Citation
Journal of Alloys and Compounds, 723, 681-688
Type
Article
Article Type
Article
Keywords
AnodeMicro EmulsionNanocompositeNiO YSZSolid Oxide Fuel Cells (SOFC)Triple Phase Boundaries
ISSN
0925-8388
Abstract
A unique nanostructured NiO-yttria-stabilized zirconia (YSZ) composite is synthesized in-situ via a water-in-oil microemulsion technique for the solid oxide fuel cell (SOFC) anode. Thermogravimetric analysis and X-ray diffraction confirm that as-synthesized powders are crystallized in-situ at ∼500 °C as the distinct NiO and YSZ phases without any impurities. Moreover, transmission electron microscopy analysis reveals that the as-synthesized primary particles via microemulsion are ∼40 nm in size and have a characteristic structure in which NiO and YSZ nanograins are heterogeneously distributed. The electrochemical activity of the nanostructured NiO-YSZ composite is evaluated using an YSZ supported cell with a La0.8Sr0.2MnO3-δ-YSZ (50:50 wt.%) cathode. The maximum power density of the SOFC employing the microemulsion-mediated NiO-YSZ anode is 2.2 times greater than that of the SOFC with the conventionally ball-milled nano-sized NiO-YSZ anode. The higher performance with our nanocomposite NiO-YSZ anode is primarily attributed to its heterogeneous nanograin structure, thus leading to a significant increase in triple phase boundary densities. © 2017 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/4276
DOI
10.1016/j.jallcom.2017.06.294
Publisher
Elsevier Ltd
Related Researcher
  • Author Lee, Kang Taek Advanced Energy Conversion and Storage Lab(AECSL)
  • Research Interests
Files:
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Collection:
ETC1. Journal Articles


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