共掺杂Sr1.5La0.5MnO4的合成及其高温电化学性能

IF 0.8 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

无机化学学报 Pub Date : 2015-01-01 DOI:10.11862/CJIC.2016.207

Yuqiao Fan, Liping Sun, H Zhao, L. Huo, J. Bassat, A. Rougier, S. Fourcade, J. Grenier

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引用次数: 2

摘要

采用edta -柠檬酸法合成了Sr1.5La0.5Mn1-xCoxO4 (SLMCOx)中温固体氧化物燃料电池正极材料，并用XRD、XPS和EIS对其进行了表征。结果表明:SLMCOx与Ce0.9Gd0.1O1.95在1 200℃下反应12 h未发生反应，氧化物中Mn3+和Co2+的含量随Co掺杂浓度的增加而增加;同时，点阵氧含量降低，点阵畸变比(c/a)增大。EIS结果表明，共掺杂显著降低了SLMCOx阴极的极化电阻(Rp)。Sr1.5La0.5Mn0.7Co0.3O4在空气中700℃时的Rp最低，为0.62 Ω·cm2，明显小于Sr1.5La0.5Mn0.7O4在750℃时的Rp值(1.5 Ω·cm2)。结果表明，Co掺杂的Sr1.5La0.5Mn1-xCoxO4是IT-SOFC的潜在正极材料。

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Synthesis and high temperature electrochemical properties of Co-doped Sr1.5La0.5MnO4

Sr1.5La0.5Mn1-xCoxO4 (SLMCOx) cathode materials for IT-SOFCs (intermediate temperature solid oxide fuel cells) were synthesized by EDTA-citric acid method and characterized by XRD, XPS and EIS, respectively. The results show that SLMCOx has no reaction with Ce0.9Gd0.1O1.95 at 1 200℃ for 12 h. Both the amount of Mn3+ and Co2+ in the oxide increase with the Co doping concentration; at the same time the content of lattice oxygen reduces, and the distortion ratio (c/a) of the lattice increases. The EIS results show that Co-doping dramatically reduces the polarization resistance (Rp) of SLMCOx cathode. The Sr1.5La0.5Mn0.7Co0.3O4 has the lowest Rp of 0.62 Ω·cm2 at 700℃ in air, which is clearly smaller than the Rp value of Sr1.5La0.5Mn0.7O4 that measured at 750℃ (1.5 Ω·cm2). Our results indicate that the Co doped Sr1.5La0.5Mn1-xCoxO4 is potential cathode material for IT-SOFC.

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来源期刊

无机化学学报化学-无机化学与核化学

CiteScore

1.40

自引率

42.90%

发文量

8709

审稿时长

2.2 months

期刊介绍： “Chinese Journal of Inorganic Chemistry” publishes fundamental studies in all phases of inorganic chemistry, including solid-state chemistry, coordination chemistry, inorganic materials chemistry, bioinorganic chemistry, organometallic chemistry, theoretical inorganic chemistry, supermolecule chemistry, applied inorganic chemistry and related field of catalysis. Emphasis is on the synthesis, thermodynamics, kinetics, spectroscopy, structure and bonding properties of new and known compounds. In addition to full-length research articles, “Chinese Journal of Inorganic Chemistry” also publishes notes, letters, and reviews. “Chinese Journal of Inorganic Chemistry” accepts manuscript written in simplified Chinese or English.