Theoretical study for the sintering of Ni anode in solid oxide fuel cell

K. Nakao; T. Ogura; T. Ishimoto; M. Koyama

doi:10.1149/1.3570153

Theoretical study for the sintering of Ni anode in solid oxide fuel cell

K. Nakao, T. Ogura, T. Ishimoto, M. Koyama

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Ni sintering is one of the main factors in SOFC degradation. In this study, we first investigated the surface orientation on Ni nanoparticles by using molecular dynamics (MD) method. It was identified that Ni nanoparticles mainly consist of four facets: (111), (100), (110), and (113). We also analyzed the stability of surface energy, which is the dominant driving force for the sintering phenomena, in various sizes of Ni nanoparticles. The MD simulation of two particles system was performed to investigate the sintering phenomena. We found that the diffusion coefficient is almost the same between 1373 and 1673 K, while contact surface orientation is different. It is indicated that dominant sintering mechanism of Ni nanoparticles is surface diffusion.

Original language	English
Title of host publication	Solid Oxide Fuel Cells 12, SOFC XII
Pages	1661-1667
Number of pages	7
Edition	2 PART 2
DOIs	https://doi.org/10.1149/1.3570153
Publication status	Published - 2011
Event	12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada Duration: May 1 2011 → May 6 2011

Publication series

Name	ECS Transactions
Number	2 PART 2
Volume	35
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
Country/Territory	Canada
City	Montreal, QC
Period	5/1/11 → 5/6/11

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1149/1.3570153

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Nakao, K, Ogura, T, Ishimoto, T & Koyama, M 2011, Theoretical study for the sintering of Ni anode in solid oxide fuel cell. in Solid Oxide Fuel Cells 12, SOFC XII. 2 PART 2 edn, ECS Transactions, no. 2 PART 2, vol. 35, pp. 1661-1667, 12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting, Montreal, QC, Canada, 5/1/11. https://doi.org/10.1149/1.3570153

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abstract = "Ni sintering is one of the main factors in SOFC degradation. In this study, we first investigated the surface orientation on Ni nanoparticles by using molecular dynamics (MD) method. It was identified that Ni nanoparticles mainly consist of four facets: (111), (100), (110), and (113). We also analyzed the stability of surface energy, which is the dominant driving force for the sintering phenomena, in various sizes of Ni nanoparticles. The MD simulation of two particles system was performed to investigate the sintering phenomena. We found that the diffusion coefficient is almost the same between 1373 and 1673 K, while contact surface orientation is different. It is indicated that dominant sintering mechanism of Ni nanoparticles is surface diffusion.",

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AU - Nakao, K.

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AU - Ishimoto, T.

AU - Koyama, M.

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N2 - Ni sintering is one of the main factors in SOFC degradation. In this study, we first investigated the surface orientation on Ni nanoparticles by using molecular dynamics (MD) method. It was identified that Ni nanoparticles mainly consist of four facets: (111), (100), (110), and (113). We also analyzed the stability of surface energy, which is the dominant driving force for the sintering phenomena, in various sizes of Ni nanoparticles. The MD simulation of two particles system was performed to investigate the sintering phenomena. We found that the diffusion coefficient is almost the same between 1373 and 1673 K, while contact surface orientation is different. It is indicated that dominant sintering mechanism of Ni nanoparticles is surface diffusion.

AB - Ni sintering is one of the main factors in SOFC degradation. In this study, we first investigated the surface orientation on Ni nanoparticles by using molecular dynamics (MD) method. It was identified that Ni nanoparticles mainly consist of four facets: (111), (100), (110), and (113). We also analyzed the stability of surface energy, which is the dominant driving force for the sintering phenomena, in various sizes of Ni nanoparticles. The MD simulation of two particles system was performed to investigate the sintering phenomena. We found that the diffusion coefficient is almost the same between 1373 and 1673 K, while contact surface orientation is different. It is indicated that dominant sintering mechanism of Ni nanoparticles is surface diffusion.

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Theoretical study for the sintering of Ni anode in solid oxide fuel cell

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