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Research Papers

GDC-Y2O3 Oxide Based Two Phase Nanocomposite Electrolyte

[+] Author and Article Information
Rizwan Raza1

Department of Energy Technology, Royal Institute of Technology (KTH), 10044 Stockholm, Sweden; Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistanrizwanr@kth.se

Ghazanfar Abbas

Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan; Department of Physics, Bahuddin Zakariya University, 60800 Multan, Pakistan

S. Khalid Imran

 GETT Fuel Cell AB, Stora Nygatan 33, S-10314 Stockholm, Sweden

Imran Patel

 British University in Egypt, 11837 Cairo, Egypt

Bin Zhu

Department of Energy Technology, Royal Institute of Technology (KTH), 10044 Stockholm, Sweden; GETT Fuel Cell AB, Stora Nygatan 33, S-10314 Stockholm, Sweden

1

Corresponding author.

J. Fuel Cell Sci. Technol 8(4), 041012 (Apr 01, 2011) (5 pages) doi:10.1115/1.4003634 History: Received October 14, 2010; Revised November 24, 2010; Published April 01, 2011; Online April 01, 2011

Oxide based two phase composite electrolyte (Ce0.9Gd0.1O2Y2O3) was synthesized by coprecipitation method. The nanocomposite electrolyte showed the significant performance of power density 785mWcm2 and higher conductivities at relatively low temperature 550°C. Ionic conductivities were measured with ac impedance spectroscopy and four-probe dc method. The structural and morphological properties of the prepared electrolyte were investigated by scanning electron microscope (SEM). The thermal stability was determined with differential scanning calorimetry. The particle size that was calculated with Scherrer formula, 15–20 nm, is in a good agreement with the SEM and X- ray diffraction results. The purpose of this study is to introduce the functional nanocomposite materials for advanced fuel cell technology to meet the challenges of solid oxide fuel cell.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

X-ray diffractogram of the GDC–Y2O3

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Figure 2

DSC curve for GDC–Y2O3 in the range 0–600°C

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Figure 3

The SEM micrograph of the composite electrolyte GDC–Y2O3

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Figure 4

The ionic conductivity of GDC–Y2O3 measured at different temperatures in the range 300–600°C by employing different techniques, dc measurement, ac impedance spectroscopy, and comparison of the results

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Figure 5

The Arrhenius plot of the ionic conductivity measured by ac method in the air atmosphere. Inset of the figure is the linear fit for the calculation of activation energy of GDC–Y2O3.

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Figure 6

I-V and I-P curves for the single cell with GDC–Y2O3 composite electrolyte at 400–600°C

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Figure 7

The stability of the single cell for 48 h with GDC–Y2O3 composite electrolyte in the range 500–550°C

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