AI 中文总结
研究引入三种高熵氧化物钙钛矿作固体氧化物燃料电池新型电解质材料，经特定烧结方法合成并用于电池制作。具有s0/d0/d10阳离子的材料性能最佳，证明此类高熵钙钛矿对质子固体氧化物燃料电池的重要性。
AI 中文摘要
固体氧化物燃料电池能将氢高效转化为电，但其阴极、阳极和电解质材料的可用性有限。本研究引入三种高熵氧化物钙钛矿作为燃料电池的新型电解质材料，通过高压扭转加工和煅烧顺序烧结合成，在阳极Ni-SrZr0.5Ce0.4Y0.1O3衬底上打印约6 - 10微米厚，再涂覆Ba0.5La0.5CoO3作为阴极。电化学分析和阻抗谱表明，具有s0/d0/d10阳离子的(Ba0.50Sr0.50)(Ti0.33Zr0.33Sn0.33)O3性能最佳，电流泄漏可忽略且欧姆电阻最低，973K时最大功率密度达0.53mW/cm²。同步加速器X射线吸收和光电子能谱分析表明，其优异性能与其异质电子结构相关。本研究证明了具有混合s0/d0/d10阳离子的高熵钙钛矿作为新型无稀土金属离子导电电解质的重要性，尤其对质子固体氧化物燃料电池。
英文摘要
Solid oxide fuel cells enable efficient conversion of hydrogen into electricity. However, the limited availability of materials for their cathode, anode, and electrolyte remains a concern. This study introduces three high-entropy oxide perovskites as novel electrolyte materials for fuel cells (Ba0.50Sr0.50)(Ti0.33Zr0.33Hf0.33)O3 with s0/d0 cations, (Ba0.50Sr0.50)(Ga0.33In0.33Sn0.33)O3 with s0/d10 cations, and (Ba0.50Sr0.50)(Ti0.33Zr0.33Sn0.33)O3 with mixed s0/d0/d10 cations. Through sequential sintering by high-pressure torsion processing and calcination, these perovskites were synthesized and then printed with a thickness of about 6-10 microns on a Ni-SrZr0.5Ce0.4Y0.1O3 substrate as an anode and then coated with Ba0.5La0.5CoO3 as a cathode. Electrochemical analysis and impedance spectroscopy show that (Ba0.50Sr0.50)(Ti0.33Zr0.33Sn0.33)O3 with s0/d0/d10 cations exhibits the best performance with negligible current leakage and lowest ohmic resistance, while its maximum power density reaches 0.53 W.cm-2 at 973 K. Complementary synchrotron X-ray absorption and photoelectron spectroscopy analyses indicate that the superior performance of (Ba0.50Sr0.50)(Ti0.33Zr0.33Sn0.33)O3 correlates with its heterogeneous electronic structure characterized by tailored unoccupied d-orbital states, and favorable local metal-oxygen bond lengths and extrinsic oxygen vacancies. This investigation demonstrates the significance of high-entropy perovskites with mixed s0/d0/d10 cations as new rare-earth metal-free ion-conducting electrolytes, particularly for protonic solid oxide fuel cells.
Comments14 pages, 8 figures
Journal refJ. Alloys Compd., 1079 (2026) 189840
DOI：10.1016/j.jallcom.2026.189840
