Conformal coating of cobalt oxide on solid oxide fuel cell cathode and resultant continuously increased oxygen reduction reaction kinetics upon operation
| Autor: | Jacky C. Prucz, Liang Liang, Sergio A Paredes Navia, Xueyan Song, Yun Chen, Kirk Gerdes, Alec Hinerman |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment 020209 energy Conformal coating Oxide Oxygen transport Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology Cathode law.invention Atomic layer deposition chemistry.chemical_compound Chemical engineering chemistry law 0202 electrical engineering electronic engineering information engineering Solid oxide fuel cell Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Polarization (electrochemistry) Cobalt oxide |
| Zdroj: | Journal of Power Sources. 405:45-50 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2018.10.022 |
| Popis: | To improve the sluggish oxygen reduction reaction from the cathode of solid oxide fuel cells (SOFCs), a conformal layer of catalytic CoOx grains was deposited onto the internal surface of LSM/YSZ composite cathode of commercial cells, through atomic layer deposition (ALD). Upon the electrochemical operation, the ALD coated cell has dramatic reduction of the polarization resistance, and the power density exhibits continuous increase over the course of 172 h operation at 750 °C and reaches the cell performance enhancement by a factor of 1.6, in comparison with that from the baseline operated for 96 h. Such performance enhancement was attributed to the combination of the newly added triple phase boundaries for promoting the oxygen reduction reaction, as well as the accelerated oxygen transport on the cathode surface. The present work opens the further research direction for ALD coating of non-precious metal catalyst to boost the performance of as-fabricated SOFCs. |
| Databáze: | OpenAIRE |
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