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 language | English |
|---|---|
| Title of host publication | Solid Oxide Fuel Cells 14, SOFC 2015 |
| Publisher | Electrochemical Society Inc. |
| Pages | 2363-2372 |
| Number of pages | 10 |
| Volume | 68 |
| Edition | 1 |
| ISBN (Electronic) | 9781607685395 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
| Externally published | Yes |
| Event | 14th 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 26 → 2015 Jul 31 |
Other
| Other | 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage |
|---|---|
| Country | United Kingdom |
| City | Glasgow |
| Period | 15/7/26 → 15/7/31 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation. / Muramatsu, Mayu; Kishimoto, H.; Yamaji, K.; Yashiro, K.; Kawada, T.; Terada, K.; Yokokawa, H.
Solid Oxide Fuel Cells 14, SOFC 2015. Vol. 68 1. ed. Electrochemical Society Inc., 2015. p. 2363-2372.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Electro-chemical potential analysis of zirconium based on the reaction-diffusion equations of oxygen ion and electron considering phase transformation
AU - Muramatsu, Mayu
AU - Kishimoto, H.
AU - Yamaji, K.
AU - Yashiro, K.
AU - Kawada, T.
AU - Terada, K.
AU - Yokokawa, H.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84938811057&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938811057&partnerID=8YFLogxK
U2 - 10.1149/06801.2363ecst
DO - 10.1149/06801.2363ecst
M3 - Conference contribution
VL - 68
SP - 2363
EP - 2372
BT - Solid Oxide Fuel Cells 14, SOFC 2015
PB - Electrochemical Society Inc.
ER -