China-Japan Workshop on Solid Oxide Fuel Cells

Development and Characterization of Cathode-Supported SOFCs by Single-Step Cofiring Fabrication for Intermediate Temperature Operation

[+] Author and Article Information
Yu Liu1

 Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japanyuliu@mail.sic.ac.cn

Shin-ichi Hashimoto, Katsuhito Takei, Masashi Mori

 Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan

Yoshihiro Funahashi

 Fine Ceramics Research Association, 2266-99 Anagahora, Shimo-shidami, Moriyama-ku, Nagoya, Aichi 463-8561, Japan


Corresponding author. Present address: Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 DingXi Road, Shanghai 200050, P.R.C.

J. Fuel Cell Sci. Technol 5(3), 031209 (May 27, 2008) (5 pages) doi:10.1115/1.2930767 History: Received August 09, 2007; Revised December 11, 2007; Published May 27, 2008

In this study, a single-step cofiring through the extrusion molding and wet-ceramic coating technique was developed to fabricate a cathode-supported microtubular cell. The cell is consisting of a Ce0.9Gd0.1O1.95 (GDC) electrolyte with a NiO–GDC anode on a porous La0.6Sr0.4Co0.2Fe0.8O3δ∕GDC tube (460μm wall thickness and 2.26mm diameter). Densification of the ceria membrane (thickness <20μm) was successful by cosintering the laminated thin electrolyte and the anode with the cathode at 1200°C. Compared with that fabricated by the conventional two-step cofiring process, the cell showed an improved performance due to the increased anode sintering temperature, which leads to an improved anode∕electrolyte interfacial property. The cell having 2cm tube length fed with humidified 30vol%H2Ar (3% H2O) produced the maximum power densities of 0.09Wcm2, 0.08Wcm2, and 0.05Wcm2, at 600°C, 550°C, and 500°C, respectively.

Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Linear shrinkage of the NiO–GDC composites (Ni:GDC=50:50 volume after reduction); the shrinkage of electrolyte was given as comparison. The NiO powders with surface areas of 4m2g−1, 8m2g−1, and 12m2g−1 were named as Ni4, Ni8, and Ni12, whereas GDC powders in 10m2g−1, 20m2g−1, and 39m2g−1 were defined as GDC10, GDC20, and GDC39, respectively

Grahic Jump Location
Figure 2

(a) XRD patterns of the NiO–GDC composite (Ni:GDC=50:50 volume after reduction) prepared by the citrate method. As comparison, XRD pattern of the GDC powders synthesized by the same method was given in (b)

Grahic Jump Location
Figure 3

Comparison in the linear shrinkage and relative density of the NiO–GDC composite prepared by citrate method and mechanical mixing (Ni:GDC=50:50 volume after reduction)

Grahic Jump Location
Figure 4

BSE-SEM micrograph of (a) NiO–GDC prepared by citrate method, and (b) the mechanically mixed NiO (4m2g−1)–GDC(10m2g−1). Both samples were sintered at 1400°C for 10h (Ni:GDC=50:50 volume after reduction)

Grahic Jump Location
Figure 5

SEM micrographs of the cross section of (a) the as-prepared cell, and (b) the enlarged view of cathode∕electrolyte∕anode section (before reduction)

Grahic Jump Location
Figure 6

Current-voltage and power density characteristics of the cells prepared by (a) the normal two-step cofiring and (b) the single-step cofiring (oxidant in cathode: air)

Grahic Jump Location
Figure 7

Current-voltage and power density characteristics of the single-step cofiring fabricated cell (oxidant in cathode: oxygen)



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In