Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation

Mayu Muramatsu, H. Kishimoto, K. Yamaji, K. Yashiro, T. Kawada, K. Terada, H. Yokokawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Phase transformations induced by the precipitation of Ni in Ni-doped 8Yttria-Stabilized Zirconia (8YSZ), which is a typical electrolyte material, have recently been known to cause electrochemical degradation of Solid Oxide Fuel Cells (SOFC). Numerical simulations are conducted to evaluate the oxygen potential distributions and then to estimate the degree of transformation during long-term operations that can be determined by the equilibrium partial pressure between Ni and NiO. The simulation results indicate that the oxidation-reduction front inside the electrolyte tends to move towards the anode side reflecting the difference in electrical conductivities with different time constants between the oxidation and reduction regions.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
PublisherElectrochemical Society Inc.
Pages2363-2372
Number of pages10
Volume68
Edition1
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: 2015 Jul 262015 Jul 31

Other

Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
CountryUnited Kingdom
CityGlasgow
Period15/7/2615/7/31

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation'. Together they form a unique fingerprint.

  • Cite this

    Muramatsu, M., Kishimoto, H., Yamaji, K., Yashiro, K., Kawada, T., Terada, K., & Yokokawa, H. (2015). Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation. In Solid Oxide Fuel Cells 14, SOFC 2015 (1 ed., Vol. 68, pp. 2363-2372). Electrochemical Society Inc.. https://doi.org/10.1149/06801.2363ecst