Pr doping of SmBaFe2O5+δ enhances the electrochemical performance as a symmetrical electrode for solid oxide fuel cells

IF 6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2026-10-01 Epub Date: 2026-07-15 DOI:10.1016/j.ceramint.2026.07.246

Ruisen Zhang, Lanlan Guo, Chunling Lu, Dongchao Qiu, Biao Wang, Bingbing Niu

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Abstract

This study focuses on the optimization of the redox performance of minor Pr doping SmBaFe_2-xPr_xO_5+δ (x = 0,0.05,0.10) symmetrical electrode materials for solid oxide fuel cells (SOFCs). The XRD results show that a small amount of Pr doping SmBaFe_2-xPr_xO_5+δ forms a tetragonal perovskite structure after high-temperature calcination. Pr doping SmBaFe_2-xPr_xO_5+δ significantly decreases the oxygen vacancy formation energy, which is beneficial for improving the catalytic activity for symmetrical electrode. The polarization resistance of the SmBaFe_1.95Pr_0.05O_5+δ (SBFP05) sample at 700 °C decreases to 0.090 Ω cm², which is approximately 43% lower than that of SmBaFe₂O_5+δ (SBF) in air. Compared with SBF, the polarization resistance of SBFP05 decreases from 1.19 Ω cm² to 0.38 Ω cm² in H₂ atmosphere, and decreases by 68%. At 800 °C, the fuel cell with the symmetrical electrode configuration of SBFP05|LSGM|SBFP05 achieves a peak power density of 1203 mW cm⁻², and operates stably at 0.7 V for 200 h with an overall attenuation rate of 0.019%·h⁻¹, demonstrating excellent durability. This work proves that minor Pr doping SmBaFe_2-xPr_xO_5+δ can simultaneously achieve electrochemical activity and interface stability, providing a feasible strategy for the design of highly stable and symmetrical electrode materials.

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Pr掺杂SmBaFe2O5+δ提高了作为固体氧化物燃料电池对称电极的电化学性能

本文研究了少量Pr掺杂SmBaFe2-xPrxO5+δ （x = 0,0.05,0.10）对称电极材料用于固体氧化物燃料电池（SOFCs）氧化还原性能的优化。XRD结果表明，少量Pr掺杂的smbfe2 - xprxo5 +δ在高温煅烧后形成四方钙钛矿结构。Pr掺杂smbfe2 - xprxo5 +δ显著降低了氧空位形成能，有利于提高对称电极的催化活性。在700 ℃时，smbafe1.95 pr0.050 o5 +δ (SBFP05)样品的极化电阻降至0.090 Ω cm2，比空气中SmBaFe2O5+δ (SBF)样品的极化电阻降低约43%。与SBF相比，SBFP05在H2气氛下的极化电阻从1.19 Ω cm2降低到0.38 Ω cm2，降低了68%。在800 °C时，电极结构为SBFP05|LSGM|SBFP05的燃料电池峰值功率密度为1203 mW cm−2，在0.7 V下稳定工作200 h，整体衰减率为0.019%·h−1，表现出优异的耐久性。本工作证明少量Pr掺杂smbfe2 - xprxo5 +δ可以同时实现电化学活性和界面稳定性，为设计高稳定性和对称性电极材料提供了可行的策略。

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

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.