化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (7) : 172-177. DOI: 10.19817/j.cnki.issn1006-3536.2025.07.030

科学研究

Ce掺杂对固体氧化物燃料电池Sr₂Fe_1.5Mo_0.5O_6-δ阴极材料的改性研究

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Modification study of Ce-doped Sr₂Fe_1.5Mo_0.5O_6-δ cathode material for solid oxide fuel cells

Zhao Jiale¹, Zeng Simeng¹, Lin Fuhua², Zhang Yanli¹, Wang Bo¹, Liu Zixuan¹

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Received		Published
2024-07-15		2025-07-20
Issue Date	Revised Date
2025-07-22	2024-07-15

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摘要

采用柠檬酸-甘氨酸燃烧法制备了一系列Ce掺杂的Sr_2-xCe_xFe_1.5Mo_0.5O_6-δ(x=0,0.05,0.1,0.15,0.2)材料,系统地研究了Ce掺杂对其晶体结构和电化学性能的影响。Ce掺杂提高了氧空位浓度和吸附氧的含量,有效提高了氧还原反应的活性。在600℃时,Ce掺杂使阴极的极化电阻(R_p)从3.182Ω·cm²(SFM)降低至1.274Ω·cm²(Sr_1.85Ce_0.15Fe_1.5Mo_0.5O_6-δ),降低了59.96%。Sr_1.85Ce_0.15Fe_1.5Mo_0.5O_6-δ阴极表现出良好的稳定性,在600℃的极化阻抗能够稳定在1.2Ω·cm²长达160h。因此,Ce掺杂可以有效提升固体氧化物燃料电池阴极的电化学性能。

Abstract

In this work,a series of Ce-doped perovskite oxide Sr_2-xCe_xFe_1.5Mo_0.5O_6-δ(x=0,0.05,0.1,0.15,0.2) materials were synthesized by the citric acid-glycine combustion method,and the effects of Ce doping on their crystal structure and electrochemical performance were systemically investigated.Ce doping significantly increased the oxygen vacancy concentration and the content of adsorbed oxygen species,promoted the reduction process for oxygen reduction reactions.Consequently,Ce doping greatly decreased the polarization resistance from 3.182(SFM) to 1.274Ω·cm² (Sr_1.85Ce_0.15Fe_1.5Mo_0.5O_6-δ) at 600℃,which was reduced by 59.96%.Furthermore,Sr_1.85Ce_0.15Fe_1.5Mo_0.5O_6-δ cathode exhibited excellent stability,remaining a polarization resistances of 1.2Ω·cm² for 110h at 600℃.These results indicate that Ce doping is an effective strategy to enhance the electrochemical performance of solid oxide fuel cell cathodes.

关键词

固体氧化物燃料电池 / Sr₂Fe_1.5Mo_0.5O_6-δ / 阴极 / 极化阻抗

Key words

solid oxide fuel cells / Sr₂Fe_1.5Mo_0.5O_6-δ / cathode / polarization impedance

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Ce掺杂对固体氧化物燃料电池Sr₂Fe_1.5Mo_0.5O_6-δ阴极材料的改性研究[J]. 化工新型材料, 2025, 53(7): 172-177 DOI:10.19817/j.cnki.issn1006-3536.2025.07.030

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