| Summary: | Fuel cell researchers are interested in proton ceramics (PCs) such as doped barium zirconate and/or barium cerates oxide, as a next-generation electrolyte for fuel cells. These types of PCs are widely used in Proton Ceramics Solid Oxide Fuel Cell (PC-SOFC) which is typically operates at temperature of 500–800 °C. At this temperature region, the couple of cathode materials such as LaSrCoFeO3 (LSCF) with PCs electrolyte such as doped Ba(Ce,Zr)O3 developed high polarization resistance (Rp). One of the factors that caused to this effect is the segregation of strontium (Sr) during sintering process. Thus, in this study, the LSCF film surfaces is modified with a small amount of metal cation ZrCl4 solution to the cathode surface at sub-monolayer coverages via dip-coating method. It was observed, the prepared LSCF layer on the BaCe0.54Zr0.36 Y0.1O3-δ (BCZY) substrate showed a significant reduction in Rp value which is 0.116 Ω cm2 compared to the unmodified LSCF thin film. © 2022
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