Cerium and ruthenium co-doped La0.7Sr0.3FeO3-δ as a high-efficiency electrode for symmetrical solid oxide fuel cell

• 作者: Junkai Wang Lei Fu Jiaming Yang Ke Wu Jun Zhou Kai Wu
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（9）
• 所属期刊栏目: ADVANCED RARE EARTH MATERIALS
• 页码范围: 1095-1099
• 页数: 5页
• 语种: 英文

摘要

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 con-ditions. 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 0.32Ω·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.