Structural and electrochemical characterization of BaCe0.7Zr0.2Y0.05Zn0.05O3 as an electrolyte for SOFC-H

[摘要] As a potential electrolyte for proton-conducting solid oxide fuel cells (SOFC-Hs) and to get better protonic conductivity and stability, zinc doped BCZY material has been found to be promising. In this study, we report a new composition of proton conductors BaCe0.7Zr0.2Y0.05Zn0.05O3(BCZYZn5) which was investigated using XRD, SEM and conductivity measurements. Rietveld refinement of the XRD data revel a cubic perovskite structure with Pm-3m space group. BaCe0.7Zr0.2Y0.05Zn0.05O3shows cell parameter a = 4.3452(9) Å. Scanning electron microscopy images shows that the grain sizes are large and compact which gives the sample high density and good protonic conductivity. The total conductivity in wet atmosphere is significantly higher than that of dry condition and the conductivity was found to be 0.276 × 10-3Scm-1and 0.204 × 10-3Scm-1at 600°C in wet and dry Ar, respectively. This study indicated that perovskite electrolyte BCZYZn5 is a promising material for the next generation intermediate temperature solid oxide fuel cells (IT-SOFCs).

[发布机构] Universiti Brunei Darussalam, Faculty of Integrated Technologies, Jalan Tunku Link, Gadong; BE 1410, Brunei^1;Universiti Brunei Darussalam, Center for Advanced Materials and Energy Sciences, Jalan Tunku Link, Gadong; BE1410, Brunei^2;Universiti Brunei Darussalam, Faculty of Sciences, Jalan Tunku Link, Gadong; BE1410, Brunei^3;Chalmers University of Technology, Department of Chemistry and Chemical Engineering, Goteborg; SE 41296, Sweden^4

[效力级别] 工业技术

[关键词] Conductivity measurements;Electrochemical characterizations;Intermediate temperature solid oxide fuel cell;Perovskite electrolytes;Proton conductors;Proton-conducting solid oxide fuel cells;Protonic conductivities;Scanning electron microscopy image