Semiconductor Fe-doped SrTiO3-δ perovskite electrolyte for low-temperature solid oxide fuel cell (LT-SOFC) operating below 520 °C
| Autor: | M.A.K. Yousaf Shah, Muhammad Asghar, Nasir Ali, Bin Zhu, Yueming Xing, Muhammad Yousaf, Peter Lund, Muhammad Akbar, Zuhra Tayyab, Sajid Rauf, Chang Ping Yang, Naveed Mushtaq |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology Ionic bonding 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 7. Clean energy 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Fuel Technology Operating temperature Chemical engineering chemistry Electrode Ionic conductivity Solid oxide fuel cell 0210 nano-technology Perovskite (structure) |
| Zdroj: | International Journal of Hydrogen Energy. 45:14470-14479 |
| ISSN: | 0360-3199 |
| Popis: | High-temperature operation of solid oxide fuel cells causes several degradation and material issues. Lowering the operating temperature results in reduced fuel cell performance primarily due to the limited ionic conductivity of the electrolyte. Here we introduce the Fe-doped SrTiO3-δ (SFT) pure perovskite material as an electrolyte, which shows good ionic conduction even at lower temperatures, but has low electronic conduction avoiding short-circuiting. Fuel cell fabricated using this electrolyte exhibits a maximum power density of 540 mW/cm2 at 520 °C with Ni-NCAL electrodes. It was found that the Fe-doping into the SrTiO3-δ facilitates the creation of oxygen vacancies enhancing ionic conductivity and transport of oxygen ions. Such high performance can be attributed to band-bending at the interface of electrolyte/electrode, which suppresses electron flow, but enhances ionic flow. |
| Databáze: | OpenAIRE |
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