High-entropy cobalt-free perovskite as a high-performing nanofiber cathode for solid oxide fuel cells

IF 10.7 2区材料科学 Q1 CHEMISTRY, PHYSICAL Journal of Materials Chemistry A Pub Date : 2024-08-17 DOI:10.1039/D4TA01803F

Xinmin Fu, Shiquan Lü, Xiangwei Meng, Chuxiao Sun, Maobin Wei, Haipeng Jiang and Weijiang Gong

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Abstract

In this study, a novel A-site high entropy perovskite oxide La_1/6Pr_1/6Nd_1/6Ba_1/6Sr_1/6Ca_1/6FeO_3−δ (LPNBSCF) is prepared by the electrospinning method and used as a cobalt-free cathode for solid oxide fuel cells (SOFCs) at intermediate temperatures. The LPNBSCF nanofiber cathode exhibits a pure phase perovskite structure and a strong chemical compatibility with the electrolyte (Sm_0.2Ce_0.8O_1.95). The anode-supported single cell with the LPNBSCF nanofiber cathode shows a remarkable peak power density (PPD) of 1.439 W cm⁻² at 750 °C, surpassing that of the cell with a La_0.6Sr_0.4FeO_3−δ (LSF) nanofiber cathode (0.836 W cm⁻²). These findings suggest the significant potential application of the LPNBSCF nanofiber cathode in SOFCs.

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高熵无钴过氧化物作为固体氧化物燃料电池的高性能纳米纤维阴极

本研究采用电纺丝法制备了一种新型 A 位高熵包晶氧化物 La1/6Pr1/6Nd1/6Ba1/6Sr1/6Ca1/6FeO3-δ (LPNBSCF)，并将其用作中温固体氧化物燃料电池 (SOFC) 的无钴阴极。LPNBSCF 纳米纤维阴极具有纯相包晶石结构，与电解质（Sm0.2Ce0.8O1.95）具有很强的化学相容性。采用 LPNBSCF 纳米纤维阴极的阳极支撑单电池在 750 °C 时的峰值功率密度（PPDs）达到了 1.439 W cm-2，超过了采用 La0.6Sr0.4FeO3-δ (LSF) 纳米纤维阴极的电池（0.836 W cm-2）。这些发现表明，LPNBSCF 纳米纤维阴极在 SOFC 中的应用潜力巨大。

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来源期刊

Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

19.50

自引率

5.00%

发文量

1892

审稿时长

1.5 months

期刊介绍： The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.