| Title |
Effects of Nano-sized Ba(Zr0.1Ce0.7Y0.2)O3-δ on Solid Oxide Fuel Cell Performances |
| DOI |
https://doi.org/10.3365/KJMM.2025.63.9.718 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Solid oxide fuel cell; BZCY; Functional layer; Nickel penetration; Proton conductor |
| Abstract |
The proton-conducting solid oxide fuel cell (P-SOFC) has been attracting attention because it offers
low- temperature operation, which not only reduces management costs but also enhances durability for longterm
operation. Ba(Zr0.1Ce0.7Y0.2)O3-δ(BZCY) is a perovskite-structured oxide material with high protonic
conductivity in wet environmental conditions. Despite this advantage, BZCY has poor sinterability. This
limitation can be addressed for SOFC electrolytes using approaches such as controlling particle size or defects.
In this study, BZCY powders were synthesized by the Pechini (BZCY(P)) and co-precipitation (BZCY(C))
methods, respectively, to produce different nano-sized powders and to investigate the effects of their size on
solid oxide fuel cell (SOFC) performance. The fine BZCY(C) powder prepared by co-precipitation had particle
sizes in the range of about 50~150 nm, smaller than the Pechini BZCY(P) powder, which was about 500~900
nm. Single cells composed of the denser electrolytes using the fine BZCY(C) powder showed higher power
density than the cell with less dense electrolytes. When the single cell was composed of the dense electrolyte
and a Ni-BZCY nano-composite anode functional layer (AFL), nickel penetration was prevented and the cell
performance was also improved, generating power densities of 0.82, 0.46 and 0.32 Wcm-2 at 800, 700 and
600 oC, respectively. |