Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 4, Pages 3800-3809Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.11.165
Keywords
Bismuth; Ceramic Electrolyte; Electrochemical Impedance; Sintering Temperature; Sintering Aids
Categories
Funding
- Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2016H1D3A1908428]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry Energy [20153030040930]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20153030040930] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016H1D3A1908428] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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To improve the microstructural and electrochemical properties of Gadolinium-doped ceria (GDC) electrolytes, materials co-doped ceria with bismuth oxide (1-5 mol%) have been successfully prepared in a one-step sol-gel combustion synthetic route. Sol-gel combustion facilitates molecular mixing of the precursors and substitution of the large Bi3+ cations into the fluorite structure, considerably reducing the sintering temperature. Adding Bi2O3 as a dopant increases the GDC densification to above 99.7% and reduces its traditional sintering temperature by 300 C. Impedance analyses show that the addition of bismuth enhances the conductivity (3.110(-2)-1.7.\10(-1) Scm(-1) in the temperature range 600-800 degrees C) and improves the performance of the solid electrolyte in intermediate-temperature solid oxide fuel cells.
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