A novel Nickel-Aluminum alloy with Titanium for improved anode performance and properties in Molten Carbonate Fuel Cells

• Published in: Journal of power sources 2017-06, Vol.352, p.90-98
• Main Authors: Frattini, Domenico, Accardo, Grazia, Moreno, Angelo, Yoon, Sung Pil, Han, Jong Hee, Nam, Suk Woo
• Format: Article
• Language: English
• Subjects: Anode; Cell test; Characterization; Impedance
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2017.03.112

The anode materials of MCFC require more investigations in order to boost performances at long term. In literature, many NiAl modified alloys have been proposed but not always enhanced cell performance and improved mechanical properties are achieved together. In this work, differently from previous literature, the use of Ti in a NiAl/Ti system is proposed as an effective strategy to enhance both mechanical and electrochemical properties. Results show that bending strength and stiffness increase whereas creep deformation under high pressure-temperature is lower, i.e. around 5–6%, compared to 7.5% of the standard benchmark. The preliminary cell tests carried out show also how the performance, in terms of current and voltage output, is better for anodes with Ti addition with a maximum power density of 165 mW cm−2 at 300 mA cm−2 for Ti 5% compared to 149 mW cm−2 of Ni5Al at the same current density. Finally, the best electrochemical behavior is found for the Ti 5% sample as it achieved the lowest internal and charge transfer resistance at the end of tests. These results suggest that NiAl/Ti systems can be eligible anode materials and are worthy to be investigated more in order to attract a renewed interest for development of MCFCs. •Titanium is used for the first time as alloying metal in NiAl-based MCFCs anode.•Physical and mechanical properties of ternary anodes are characterized.•Results show that mechanical and creep properties are improved remarkably.•The anode with Ti 5 % wt. has the best performance in single cell tests.