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- W3200432253 abstract "A bilayer composite electrolyte comprising BaCe0.85Y0.15O3-d (BCY15) – Gd0.2Ce0.8O2-d (GDC20) at the anode side and BaZr0.85Y0.15O3-d (BZY15) – Nd0.1Ce0.9O2-d (NDC10) at the cathode side is designed for improving the stability of co-ionic conducting solid oxide fuel cells (SOFCs) in a cell imbalanced stack. Contrary to the single layer structured SOFCs, the bi-layer cell stably operates without electrode delamination under negative voltage conditions. We measure local internal pO2 values using embedded Pt probes. Based on these values, local electronic conduction is estimated in combination with four probe DC conductivity measurements. It is found that n-type conductivity (∼10−3 Scm−1) and p-type conductivity (10−5–10−4 Scm−1) are developed in the BCY15-GDC20 near the anode side and in the BZY15-NDC10 near the cathode side, respectively. The results indicate that local electronic conduction in electrolyte regions near both the anode and cathode interfaces is a crucial factor for the durability of co-ionic SOFCs under negative voltage operation. We therefore suggest the bi-layer configuration as a practical solution to protect co-ionic SOFCs in a cell-imbalanced stack." @default.
- W3200432253 created "2021-09-27" @default.
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- W3200432253 date "2021-11-01" @default.
- W3200432253 modified "2023-10-09" @default.
- W3200432253 title "Design concept of co-ionic conducting solid oxide electrolyte for stable operation in a cell-imbalanced fuel cell stack" @default.
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- W3200432253 doi "https://doi.org/10.1016/j.jpowsour.2021.230483" @default.
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