Fabrication of Ni–Al–Cr alloy anode for molten carbonate fuel cells

Nguyen, Huynh Van; Song, Shin Ae; Seo, Dongjea; Park, Dong Nyeok; Ham, Hyung Chul; Oh, In Hwan; Yoon, Sung Pil; Han, Jonghee; Nam, Suk Woo; Kim, Jinsoo

doi:10.1016/j.matchemphys.2012.08.018

Cited by 11 publications

(2 citation statements)

References 25 publications

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“…Even though this alloy has been shown to be ideal as an anode, some authors found that the loss of porosity during the MCFC’s operation influences the catalytic performance and efficiency of anodes [ 10 , 12 , 13 ]. Some alloying elements have been incorporated into NiAl anodes to improve their structural stability, such as titanium [ 14 ], chromium [ 15 , 16 ], and copper [ 17 , 18 ]. Studies have demonstrated that the anodes can be mechanically reinforced by adding a third alloying element to the NiAl or incorporating a hard metal oxide as a coating to block the dislocation movement and the sintering that can occur during the cell’s operation [ 14 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…These ternary systems have interesting electrochemical properties, good ductility and stiffness, low creep resistance, and good corrosion resistance [ 14 , 20 ]. Nguyen et al [ 15 ] incorporated chromium into the Ni-Al anode, finding the best creep strain with Ni-5 wt.% Al-10 wt.% Cr. However, the chromium addition did not improve the electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

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Ni-Al Bronze in Molten Carbonate Manufactured by LPBF: Effect of Porosity Design on Mechanical Properties and Oxidation

et al. 2023

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Fuel cell technology has developed due to diminishing dependence on fossil fuels and carbon footprint production. This work focuses on a nickel–aluminum bronze alloy as an anode produced by additive manufacturing as bulk and porous samples, studying the effect of designed porosity and thermal treatment on mechanical and chemical stability in molten carbonate (Li2CO3-K2CO3). Micrographs showed a typical morphology of the martensite phase for all samples in as-built conditions and a spheroid structure on the surface after the heat treatment, possibly revealing the formation of molten salt deposits and corrosion products. FE-SEM analysis of the bulk samples showed some pores with a diameter near 2–5 μm in the as-built condition, which varied between 100 and −1000 μm for the porous samples. After exposure, the cross-section images of porous samples revealed a film composed principally of Cu and Fe, Al, followed by a Ni-rich zone, whose thickness was approximately 1.5 µm, which depended on the porous design but was not influenced significantly by the heat treatment. Additionally, by incorporating porosity, the corrosion rate of NAB samples increased slightly.

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