Properties of (Ce0.8Y0.2-xNdxO1.9)0.99(ZnO)0.01 Electrolyte Prepared by EDTA-citrate Complexing Method

doi:10.3724/SP.J.1077.2012.00265

Abstract

Abstract: Samples of (Ce_0.8Y_0.2-xNd_xO_1.9)_0.99(ZnO)_0.01 (0≤x≤0.2) were synthesized by EDTA-citrate complexing method. The samples were characterized by thermogravimetric, X-ray diffraction, thermal expansion measurement and AC impedance spectroscope, respectively. The effect of Y/Nd dopant ratio on the electrical properties of materials was studied particularly. The results show that all samples prepared by EDTA-citrate complexing method have single cubic fluorite structure. The relatively dense (Ce_0.8Y_0.2-xNd_xO_1.9)_0.99(ZnO)_0.01 series samples can be obtained after sintered at 1350℃ with 1mol% ZnO. Among all the samples, (Ce_0.8Y_0.05Nd_0.15O_1.9)0.99(ZnO)_0.01 shows the highest ionic conductivity of 58.79 mS/cm measured at 750℃. The thermal expansion coefficients of all samples are in the range of (11.83-12.30)×10^-6 /K.

Key words: solid oxide fuel cell, electrolyte, EDTA-citrate complexing method, co-doped ceria, ionic conductivity

CLC Number:

TM911

LI Shu-Jun, GE Lin, ZHENG Yi-Feng, ZHOU Ming, CHEN Han, GUO Lu-Cun. Properties of (Ce_0.8Y_0.2-xNd_xO_1.9)_0.99(ZnO)_0.01 Electrolyte Prepared by EDTA-citrate Complexing Method[J]. Journal of Inorganic Materials, 2012, 27(3): 265-270.

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Properties of (Ce_0.8Y_0.2-xNd_xO_1.9)_0.99(ZnO)_0.01 Electrolyte Prepared by EDTA-citrate Complexing Method

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