Improving the Electrocatalytic Activity of a High-Entropy Ruddlesden–Popper Perovskite Air Electrode for Solid Oxide Cells Through Composition Regulation

IF 26 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2026-04-27 DOI:10.1002/aenm.70992

Jian Zhang, Penghui Yao, Jinpeng Zhang, Tianqi Shao, Zifan Niu, Xuehua Zhang, Dehe Lin, Beibei Yang, Yicheng Zhao, Yongdan Li

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Abstract

One major challenge to the application of solid oxide cell technology is the poor catalytic activity and stability of air electrodes. High-entropy engineering has been considered as a promising strategy to improve the activity and durability of perovskite-derived air electrodes. However, the understanding of the individual contributions of configurational entropy and specific elemental composition to the performance improvement is still insufficient. Herein, the effects of A-site elements and configurational entropy on the performance of Ruddlesden–Popper-structured (La/Sr/Pr/Ba/Ca)₂Ni_0.5Fe_0.5O_4±δ electrodes are investigated. The results demonstrate that the electrocatalytic activity of the electrode is highly related to the reactivity of lattice oxygen. The polarization resistance of the electrode is negatively correlated with the content of Sr and the configurational entropy, and a Sr-rich Sr_0.8La_0.3Pr_0.3Ba_0.3Ca_0.3Ni_0.5Fe_0.5O_4±δ electrode with a sub-high entropy exhibits the lowest polarization resistance of 0.044 Ω cm² at 700°C. A protonic ceramic cell with that air electrode achieves a peak power density of 2.15 W cm⁻² in the fuel cell mode and a current density of 2.88 A cm⁻² for H₂O electrolysis under 1.3 V at 700°C. Meanwhile, the air electrode exhibits high stability in CO₂ and H₂O atmospheres.

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通过成分调控提高高熵Ruddlesden-Popper钙钛矿空气电极对固体氧化物电池的电催化活性

固体氧化物电池技术应用的一个主要挑战是空气电极的催化活性和稳定性差。高熵工程被认为是提高钙钛矿衍生空气电极的活性和耐久性的一种有前途的策略。然而，构型熵和特定元素组成对性能改进的个体贡献的理解仍然不足。本文研究了a位元素和构型熵对ruddlesden - popper结构（La/Sr/Pr/Ba/Ca）2Ni0.5Fe0.5O4±δ电极性能的影响。结果表明，电极的电催化活性与晶格氧的反应活性密切相关。电极的极化电阻与Sr含量和构型熵呈负相关，在700℃时，富Sr的Sr0.8La0.3Pr0.3Ba0.3Ca0.3Ni0.5Fe0.5O4±δ电极的极化电阻最低，为0.044 Ω cm2。使用该空气电极的质子陶瓷电池在燃料电池模式下的峰值功率密度为2.15 W cm−2，在700℃下，在1.3 V条件下电解水时的电流密度为2.88 A cm−2。同时，空气电极在CO2和H2O气氛中表现出较高的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.