Research Papers

Fabrication and Performance of La0.6Sr0.4Co0.2Fe0.8O3−δ Infiltrated-Yttria-Stabilized Zirconia Cathode on Anode-Supported Solid Oxide Fuel Cell

[+] Author and Article Information
Dan Tang, Zi-Wei Zheng

Union Research Center of Fuel Cell,
School of Chemical and
Environmental Engineering,
China University of Mining and Technology,
Beijing 100083, China

Min-Fang Han

Union Research Center of Fuel Cell,
School of Chemical and
Environmental Engineering,
China University of Mining and Technology,
Beijing 100083, China
e-mail: hanminfang@sina.com

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received February 25, 2014; final manuscript received August 7, 2014; published online November 25, 2014. Assoc. Editor: Dr Masashi Mori.

J. Fuel Cell Sci. Technol 12(1), 011001 (Feb 01, 2015) (5 pages) Paper No: FC-14-1026; doi: 10.1115/1.4028947 History: Received February 25, 2014; Revised August 07, 2014; Online November 25, 2014

The three layers with porous yttria-stabilized zirconia (YSZ) backbone/dense YSZ/porous NiO–YSZ were fabricated by tape-casting process, respectively, then laminated together and co-fired at 1300 °C for 5 h. The cathode material La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) was loaded by infiltrating the precursor of metal ions into porous YSZ backbone. As a result, LSCF nanoparticles with the size of 60–100 nm were uniformly distributed on YSZ backbone. The power density was 1.046 W cm−2 and the polarization resistance was 0.17 Ω cm2 at 800 °C in humidified H2 (3 vol.% H2O). But the stability was not good enough, especially in early operating stage, e.g., 20 h. After that, it showed good stability for the following 70 h operating under a constant voltage of 0.7 V at 750 °C. This is due to the growth and agglomeration of LSCF nanoparticles at early steps, which reduced the three phase boundaries (TPBs).

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Grahic Jump Location
Fig. 4

The power density of an anode-supported cell with LSCF infiltrated YSZ cathode under constant voltage of 0.7 V at 750 °C, operated in humidified H2 (3 vol. % H2O)

Grahic Jump Location
Fig. 5

SEM micrographs of (a) LSCF-infiltrated YSZ backbone before testing and (b) LSCF nanoparticles after long-term stability testing

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Fig. 3

Performance of the anode-supported single cell operated in humidified H2 (3 vol. % H2O) at different temperatures with LSCF infiltrated YSZ cathodes calcined at 850 °C: ((a) V–I curves and (b) impedance spectra)

Grahic Jump Location
Fig. 2

SEM micrographs of fractured cross section of ((a) and (b)) the porous–dense–porous trilayer structure, and (c) porous YSZ backbone

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Fig. 1

XRD pattern of LSCF powder synthesized at 850 °C for 5 h from the infiltration solution



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