Enhanced electrochemical performance, water storage capability and coking resistance of a Ni+BaZr0.1Ce0.7Y0.1Yb0.1O3−δ anode for solid oxide fuel cells operating on ethanol. (14th April 2015)

• Record Type: Journal Article
• Authors: Wang, Wei; Chen, Yubo; Wang, Feng; Tade, Moses O.; Shao, Zongping
• Is Part Of: Chemical engineering science. Volume 126(2015)
• Page Start: 22
• Page End: 31
• Publication Date: 2015-04-14
• Subjects: Electrochemistry -- Energy -- Fuel -- Sustainability -- Catalysis; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2014.12.011
• Languages: English
• ISSNs: 0009-2509

Abstract

Abstract: To improve the water storage capability, electrochemical activity and coking resistance of the Ni+BaZr0.4 Ce0.4 Y0.2 O3-δ (BZCY4) material, the reduction of Zr amount and partial Yb doping on Y site are investigated in this study for its application as anode materials for solid oxide fuel cells (SOFCs) operating on ethanol fuel. It is found that the Ni+BaZr0.1 Ce0.7 Y0.1 Yb0.1 O3-δ (BZCYYb) anode presents better water storage capability, coking resistance and electrochemical activity for hydrogen oxidation than Ni+BZCY4 and Ni+BaZr0.1 Ce0.7 Y0.2 O3-δ (BZCY7) anodes. In addition, remarkable cell performance with ethanol as the fuel is obtained with Ni+BZCYYb anodes. For instance, a peak power density higher than 900 mW cm −2 at 750 °C is delivered from a single cell with ethanol as a fuel. Furthermore, a good operational stability is achieved at 600 °C for around 100 h with Ni+BZCYYb anodes operating on ethanol fuel. The good catalytic activity for ethanol–steam reforming, superior coking resistance, high water storage capability, remarkable cell power output and operational stability make these Ni+BZCYYb cermets good candidates as the anodes in intermediate-temperature (IT) SOFCs. Highlights: Ni+BaZr0.1 Ce0.7 Y0.1 Yb0.1 O3− δ is developed as anode for solid oxide fuel cells. This anode presents good water storage capability and coking resistance. This anode has high electrochemical activity for hydrogen and ethanol oxidation. High power output of 953 mW cm −2 was obtained with ethanol fuel at 750 °C. The fuel cell with this anode delivered a good stability on ethanol fuel.