Effect of co-dopant addition on the properties of yttrium and neodymium doped barium cerate electrolyte |
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| Institution: | 1. College of Energy, Soochow University, No 1 Shizi Street, Gusu District, Suzhou, 215006, China;2. Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, No 1 Shizi Street, Gusu District, Suzhou, 215006, China;3. Department of Materials Science and Engineering, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan;1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;2. Research Reactor Institute, Kyoto University, Osaka-Fu 590-0494, Japan;3. Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province, Hefei 230009, China;1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;2. Institute of Special Ceramics and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. Department of Chemical Engineering, Gachon University, Bokjung-dong, Seongnam, Gyeonggi-Do, 1342, Republic of Korea;2. Department of Electronic Engineering, Gachon University, Bokjung-dong, Seongnam, Gyeonggi-Do, 1342, Republic of Korea;1. High-Temperature Energy Materials Research Center, KIST, Seoul 136-791, Republic of Korea;2. Department of Materials Science & Engineering, Korea University, Seoul, Republic of Korea |
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| Abstract: | The paper discusses the Y and Nd doped barium cerate perovskites prepared by a modified Pechini method. The series prepared is described by the formula BaCe0.80YxNd0.2?x O3?δ. The BaCeO3 based powders, about 10–20 nm sized and uniformly shaped, were obtained through the calcination of the gel at 500 °C for 2 h. Their structures and ionic conductivities were characterized by X-ray diffraction and AC impedance spectroscopy. All the electrolytes were found to be barium cerate based solid solutions of perovskite type structures. Impedance spectra indicate that the grain boundary resistance of the specimen synthesized by this method is smaller than that of the samples prepared by a conventional solid-state method. The ionic conductivities of co-doped barium cerate were a factor of several times than that of the single-doped one at 673–1073 K. Among the electrolytes examined, the one co-doped with 5 mol% Nd and 15 mol% Y shows the best improvement in performance. These co-doped barium cerate are more ideal intermediate temperature (IT) electrolyte materials. |
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