Lower down both ohmic and cathode polarization resistances of solid oxide fuel cell via hydrothermal modified gadolinia doped ceria barrier layer
| Autor: | Hongxia Qu, Qin Zhong, Lyu Qiuqiu, Zaihong Sun, Kaihua Sun, Tenglong Zhu, Minfang Han |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Open-circuit voltage 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology 01 natural sciences Cathode Hydrothermal circulation Anode law.invention Barrier layer Chemical engineering law 0103 physical sciences Materials Chemistry Ceramics and Composites Solid oxide fuel cell 0210 nano-technology Ohmic contact |
| Zdroj: | Journal of the European Ceramic Society. 41:5931-5938 |
| ISSN: | 0955-2219 |
| Popis: | Hydrothermal reaction in Cerium and Gadolinium solution as an optimization method is developed and first reported for the densification of gadolinia doped ceria, the barrier layer between Zirconia electrolyte and (La,Sr)(Co,Fe)O3-δ cathode. This method is based on the hydrothermal reaction for nano particles in-situly grown on porous surface, to improve barrier layer density, alongside the sintering of cathode at 1075 °C. As a result, the ohmic resistance is prominently decreased by ∼16.4 % at 750 °C for electrolyte supported symmetrical cell. Whereas, the cathode polarization resistance is decreased by as much as a factor of ∼3 from 0.3702 Ω·cm2 to 0.1325 Ω·cm2 at 750 °C and p O 2 = 0.21 a t m . Furthermore, the anode supported cell exhibits higher open circuit voltage, smaller area specific resistance, elevated performance output and less degradation. And this modified barrier layer shows reduced Sr migration in 300 h operation at 750 °C. The hydrothermal reaction is demonstrated to prepare denser and sintering-active barrier layer with faster oxygen ion transfer and better interface connection, with large-scale application prospects and cost-competitiveness. |
| Databáze: | OpenAIRE |
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