Redox cycling performance of inert-substrate-supported tubular single cells with nickel anode current collector
| Autor: | Kai Zhao, Byung-Guk Ahn, Bok-Hee Kim, Qing Xu, Yanhai Du |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Metallurgy Energy Engineering and Power Technology Electrolyte Current collector Electrochemistry Redox Cathode Anode law.invention Chemical engineering law Electrical and Electronic Engineering Physical and Theoretical Chemistry Current density Yttria-stabilized zirconia |
| Zdroj: | Journal of Power Sources. 293:336-342 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2015.05.089 |
| Popis: | An inert-substrate-supported tubular single cell, with a configuration of porous yttria-stabilized zirconia (YSZ) supporter/Ni anode current collector/Ni–Ce0.8Sm0.2O1.9 anode/YSZ/Ce0.8Sm0.2O1.9 bi-layer electrolyte/La0.6Sr0.4Co0.2Fe0.8O3−δ cathode, has been fabricated by extrusion and dip-coating techniques. Thickness of the Ni layer is modified by controlling the number of dip-coatings from one to four. Electrochemical performance and redox cycling stability of the single cell are investigated with respect to the microstructure of the Ni layer. Increasing the thickness of the Ni layer enhances the maximum power density of the cell, while it is unfavorable for the redox cycling stability. Considering the trade-off between these two aspects, an optimum dip-coating time is determined to be two. The cell shows a reasonable maximum power density of 453 mW cm−2 at 800 °C, as well as good redox cycling stability within eight redox cycles. Additionally, 10 vol.% Ce0.8Sm0.2O1.9 ceramic particle is incorporated into the Ni layer to further improve the redox cycling stability. The cell exhibits enhanced redox cycling performance after the Ce0.8Sm0.2O1.9 incorporation. Within seven redox cycles, the cell voltage loss is less than 1% at a current density of 400 mA cm−2, and it maintains 93% of its initial performance after 11 redox cycles. |
| Databáze: | OpenAIRE |
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