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Cerium and ruthenium co-doped La0.7Sr0.3FeO3–δ as a high-efficiency electrode for symmetrical solid oxide fuel cell
Journal of Rare Earths ( IF 5.2 ) Pub Date : 2021-01-27 , DOI: 10.1016/j.jre.2021.01.009
Junkai Wang , Lei Fu , Jiaming Yang , Ke Wu , Jun Zhou , Kai Wu

Symmetrical solid oxide fuel cells (SSOFCs) could be alternative energy conversion devices due to their simple fabrication process and low cost. Herein, perovskite La0.6Ce0.1Sr0.3Fe0.95Ru0.05O3–δ (LCSFR) was synthesized and evaluated as a high-performance electrode for SSOFCs based on the electrolyte of La0.9Sr0.1Ga0.8Mg0.2O3–δ (LSGM). LCSFR retains their stable perovskite crystal structure in both reducing and oxidizing atmospheres, though a minor amount of LaSrFeO4 phase is present under reducing conditions. Morphology investigation shows that homogeneously dispersed Ru metallic nanoparticles are exsolved on the surface of LCSFR after being reduced. The polarization resistance (Rp) of LCSFR-CGO (Ce0.9Gd0.1O2–δ) is about 0.11 Ω⋅cm2 at 800 °C in air, while the value of Rp for LCSFR-CGO in wet H2 (3% H2O) increases up to 0.32 Ω⋅cm2. The symmetrical LCSFR-CGO|LSGM|LCSFR-CGO cell demonstrates a performance with an open circuit potential (OCV) of 1.07 V and a maximum peak power density of 904 mW/cm2 at 800 °C using wet H2 as the fuel. This high performance indicates that LCSFR is a candidate electrode for SSOFCs.



中文翻译:

铈和钌共掺杂的 La 0.7 Sr 0.3 FeO 3– δ作为对称固体氧化物燃料电池的高效电极

对称固体氧化物燃料电池(SSOFCs)由于其简单的制造工艺和低成本可以成为替代的能量转换装置。在此,钙钛矿 La 0.6 Ce 0.1 Sr 0.3 Fe 0.95 Ru 0.05 O 3– δ (LCSFR) 被合成并评估为基于 La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3– δ ( LCSFR) 电解质的高性能 SSOFC 电极。LSGM)。LCSFR 在还原和氧化气氛中都保持其稳定的钙钛矿晶体结构,尽管少量的 LaSrFeO 4相在还原条件下存在。形态学研究表明,均匀分散的 Ru 金属纳米粒子在被还原后溶出在 LCSFR 表面。极化电阻([R p的)LCSFR-CGO(铈0.9的Gd 0.1 ø 2- δ)为约0.11Ω⋅cm 2在800℃下在空气中,而值[R p在湿H代表LCSFR-CGO 2( 3% H 2 O) 增加到 0.32 Ω⋅cm 2。对称 LCSFR-CGO|LSGM|LCSFR-CGO 电池的开路电位 (OCV) 为 1.07 V,最大峰值功率密度为 904 mW/cm 2在 800 °C 下使用湿 H 2作为燃料。这种高性能表明 LCSFR 是 SSOFC 的候选电极。

更新日期:2021-01-27
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