preprints_ui: xhn73_v2
Data license: ODbL (database) & original licenses (content) · Data source: Open Science Framework
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| xhn73_v2 | Open-circuit Voltage Anomalies in Yttria-stabilized Zirconia and Samaria-doped Ceria Bilayered Electrolytes (Considering Jarzynski’s Equality in Wagner’s Equation) | The OCV (open-circuit voltage) using SDC (samaria-doped ceria) electrolytes is explained by Wagner’s equation. According to this theory, even if there is no external current, there are two internal currents created by electrons and oxygen ions. Due to the ohmic loss caused by the internal ionic short-circuit current, the OCV is 0.80 V, which is lower than the theoretical voltage of 1.15 V. Coating a thin electron-blocking layer of YSZ (yttria-stabilized zirconia) onto the SDC electrolyte improves the OCV. However, while YSZ films deposited on the anode side are very effective, but YSZ films deposited on the cathode side are not nearly as effective as those deposited on the anode side. Thus, we proposed experiments to confirm whether electronic leakage currents can be blocked by YSZ films deposited on the cathode side. A polished YSZ electrolyte (500 m thickness) on the cathode side and a polished SDC electrolyte (970 m) on the anode side were physically contacted. By measuring the transient process, we showed that a high OCV (819 mV) was not due to stopping the electronic leakage current. Using Jarzynski’s equality, we explained the voltage loss (0.35 V) during ion hopping in SDC electrolytes. | 2025-03-26T10:26:27.713924 | 2025-03-26T10:36:41.517622 | 2025-03-26T10:36:17.532156 | 2019-01-29T15:00:00 | ecsarxiv | 1 | accepted | 2 | 1 | https://doi.org/10.1149/osf.io/xhn73_v2 | CC-By Attribution 4.0 International | SOFC; Wagner's equation; doped Ceria | ["SOFC", "Wagner's equation", "doped Ceria"] | Tomofumi Miyahita | [{"id": "ma3cy", "name": "Tomofumi Miyahita", "index": 0, "orcid": "0000-0001-5046-5875", "bibliographic": true}] | Tomofumi Miyahita | Engineering; Materials Science and Engineering; Physical Sciences and Mathematics; Chemistry; Materials Chemistry; Solid Oxide Fuel Cells | [{"id": "5ae728ad4667e6000f98dd92", "text": "Engineering"}, {"id": "5ae728ae4667e6000f98dd9c", "text": "Materials Science and Engineering"}, {"id": "5ae728ae4667e6000f98dd9d", "text": "Physical Sciences and Mathematics"}, {"id": "5ae728b24667e6000f98ddde", "text": "Chemistry"}, {"id": "5ae728b34667e6000f98de08", "text": "Materials Chemistry"}, {"id": "5ae728b34667e6000f98de19", "text": "Solid Oxide Fuel Cells"}] | https://osf.io/download/67e3d6c8ff2e801337ceab35 | 0 | available | available | ["https://iopscience.iop.org/article/10.1149/MA2021-01412048mtgabs"] | 2025-04-09T21:06:17.217932 |