MAUVY, Fabrice; LALANNE, Cécile; BASSAT, Jean-Marc.; GRENIER, Jean-Claude; ZHAO, Hui; HUO, Lihua; STEVENS, Philippe

doi:10.1149/1.2207059

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

MAUVY, Fabrice
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

LALANNE, Cécile
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BASSAT, Jean-Marc.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Idioma

Article de revue

Este ítem está publicado en

Journal of The Electrochemical Society. 2006, vol. vol. 153, n° 8, p. p. A1547-A1553

Electrochemical Society

Resumen en inglés

The perovskite-type materials, Ln2NiO4+delta, were prepared by a modified Pechini method and their electrochemical properties investigated using ac impedance and dc polarization methods from 300 to 800°C under different oxygen partial pressures. Schouler methodology based on the frequency relaxation has been used to assign different electrochemical processes. A transfer process related to oxygen ions moving between the electrolyte and electrode interface was found in the mixed ionic and electronic conducting electrode/electrolyte system. The study shows that the Nd1.95NiO4+delta compound exhibits promising electrode properties due to its high chemical stability and low polarization resistance. The oxygen diffusion process is the rate-limiting step at low oxygen partial pressure, whereas the charge-transfer process becomes more important at higher oxygen partial pressure.< Leer menos

Palabras clave en italiano

Perovskite

Electrodes

Impedance spectroscopy

Polarization

Ln2NiO4+delta

Materials

Metadatos

Licencia de uso del documento

Electrode properties of Ln2NiO4+delta (Ln=La, Nd, Pr) : AC Impedance and DC Polarization Studies

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en italiano

DOI

Orígen

Centros de investigación