An effect of microstructure on the interface resistance between a perovskite-type oxide electrode and yttria-stabilized zirconia
Tóm tắt
The electrode characteristics of perovskite-type oxides, La0.6Sr0.4CoO3 and La0.6Sr0.4MnO3, on ceria-based oxide and stabilized zirconia were analysed by the a.c. impedance method. The ionic conductivities of the electrolyte and electrode conductivities from the a.c. impedance analysis agreed with those obtained from the current interruption and d.c. four-probe methods. Two semicircles from the charge transfer and diffusion processes appeared as the electrode resistance. The relative contribution of these two processes to the overall electrode resistance strongly depended on the microstructure of the electrode. The electrode microstructure could be controlled by the dispersion medium used for the electrode slurry. The La0.6Sr0.4MnO3 electrode coated with n-butyl acetate slurry exhibited the smallest electrode resistance.
Tài liệu tham khảo
T. INOUE, K. EGUCHI, T. SETOGUCHI and H. ARAI, Solid State Ionics 40/41 (1990) 407.
H. YAHIRO, Y. BABA, K. EGUCHI and H. ARAI, J. Electrochem. Soc. 135 (1988) 2077.
A. O. ISENBERG, Solid State Ionics 3/4 (1981) 431.
T. INOUE, N. SEKI, K. EGUCHI and H. ARAI, J. Electrochem. Soc. 137 (1990) 2523
Da Yu WANG and A. S. NOWICK, ibid. 126 (1979) 1155.
J. MIZUSAKI, K. AMANO, S. YAMAUCHI and K. FUEKI, Solid State Ionics 22 (1988) 313.
Y. TAKEDA, R. KANNO, M. NODA, Y. TOMIDA and O. YAMAMOTO, J. Electrochem. Soc. 134 (1987) 2656.
N. SAKAI, T. KAWADA, H. YOKOKAWA and M. DOKIYA, J. Mater. Sci. 25 (1990) 4531
K. TSUNEYOSHI, K. MORI, A. SAWATA, J. MIZUSAKI and H. TAGAWA, Solid State Ionics 35 (1989) 263