High-performance Sr1.9Fe1.45Pd0.05Mo0.5O6−δ electrode for reversible symmetrical solid oxide cells

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2024-10-30 DOI:10.1016/j.matlet.2024.137639

引用次数: 0

Abstract

Reversible symmetrical solid oxide cells (RS-SOCs) have attracted much attention due to their high energy conversion efficiency and fabrication simplicity. The double perovskite with the general formula A₂BB’O₆ is often used as the electrode material. In this study, Fe was substituted with Pd in the B-site of Sr_1.9Fe_1.5Mo_0.5O_6−δ to enhance the electrochemical performance above 50 %. The characterization results showed that the doping of Pd promoted the kinetics of the electrode reaction and thus improved the electrochemical activity. A maximum power density of 870 mW cm⁻² at 800 ℃ on a La_0.9Sr_0.1Ga_0.8Mg_0.2O_3–_δ (LSGM)-supported symmetrical cell with Sr_1.9Fe_1.45Pd_0.05Mo_0.5O_6-δ electrode was achieved in the solid oxide fuel cells (SOFCs).

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用于可逆对称固体氧化物电池的高性能 Sr1.9Fe1.45Pd0.05Mo0.5O6-δ 电极

可逆对称固体氧化物电池（RS-SOC）因其能量转换效率高、制造简单而备受关注。通式为 A2BB'O6 的双过氧化物常被用作电极材料。在本研究中，Sr1.9Fe1.5Mo0.5O6-δ的 B 位用钯取代了铁，使其电化学性能提高了 50%以上。表征结果表明，掺杂钯促进了电极反应动力学，从而提高了电化学活性。在固体氧化物燃料电池（SOFC）中，La0.9Sr0.1Ga0.8Mg0.2O3-δ（LSGM）支撑的对称电池与 Sr1.9Fe1.45Pd0.05Mo0.5O6-δ 电极在 800 ℃ 时的最大功率密度达到了 870 mW cm-2。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive