Determination of the exchange current in the SOFC composite cathode |
| |
| Authors: | A. Touati A. Hammou |
| |
| Affiliation: | (1) Institut Supérieur des Sciences Appliquées et de Technologie de Mateur, Route de Tabarka, 7030 Mateur, Tunisia;(2) Laboratoire d’Electrochimie et de Physicochimie des Matériaux et des Interfaces (LEPMI-INPG,CNRS,UJF) 1130, rue de la Piscine, BP 75, 38402 Saint Martin d’Hères, France |
| |
| Abstract: | To evaluate the exchange current I o of the oxygen electrode reaction at the O2 strontium-doped lanthanum manganite (LSM)/yttria stabilized zirconia (YSZ) composite/YSZ interface, the variation of the current I vs overvoltage η is measured at low cathodic and anodic polarizations (−50 to 30 mV). A linear behavior is observed within this potential domain with a unique slope. Taking into account of the dissociative adsorption of the oxygen molecule on the LSM electrocatalyst surface and the charge transferred at the triple-phase boundary, the exchange current is evaluated to 2.93 mA in air at 747 °C. |
| |
| Keywords: | SOFC Cathode |
| 本文献已被 SpringerLink 等数据库收录！ |
|
