Evaluation of Layered Perovskite PrBaCo1.8Fe0.2O5+δ Cathode for Intermediate-Temperature Solid Oxide Fuel Cell

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2025-05-07 DOI:10.1007/s13391-025-00574-8

Aofei Li, Pingxiang Duan, Dingshan Zhen, Yue Xu, Fushao Li, YanYan Zhu, Tong Wu, Long Jiang, Qiming Pei

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Abstract

Layered-perovskite oxide PrBaCo_1.8Fe_0.2O_5+δ (PBCF) was successfully synthesized by sol–gel method. The crystal structure, surface chemical state, conductivity, and electrochemical performance of cathode materials were systematically investigated. X-ray photoelectron spectroscopy analysis revealed that Co ions exist in the mixed valence state of Co²⁺/Co³⁺/Co⁴⁺, while Fe ions in PBCF sample are predominantly in the Fe³⁺/Fe⁴⁺ oxidation state. The PBCF sample exhibits superior electrochemical properties under working conditions, surpassing most previously reported PrBaCo₂O_5+δ cathode materials. Distribution of relaxation times analysis indicates that the charge exchange at the electrode/electrolyte interface becomes the primary rate-limiting step in the oxygen reduction process of PBCF cathode materials.

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层状钙钛矿PrBaCo1.8Fe0.2O5+δ中温固体氧化物燃料电池阴极性能评价

采用溶胶-凝胶法制备了层状钙钛矿氧化物PrBaCo1.8Fe0.2O5+δ (PBCF)。系统地研究了正极材料的晶体结构、表面化学状态、电导率和电化学性能。x射线光电子能谱分析表明，样品中Co离子以Co2+/Co3+/Co4+的混合价态存在，而Fe离子主要以Fe3+/Fe4+氧化态存在。PBCF样品在工作条件下表现出优异的电化学性能，超过了之前报道的大多数PrBaCo2O5+δ正极材料。弛豫时间分布分析表明，电极/电解质界面的电荷交换成为PBCF正极材料氧还原过程的主要限速步骤。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.