Electrochemical characterization of a La0.8Sr 0.2Ni0.4Fe0.6O3-δ electrode interfaced with La9.83Si5Al0.75Fe 0.25O26±δ apatite-type electrolyte

Gasparyan, H; Argirusis, Chr; Szepanski, Ch; Sourkouni, G; Stathopoulos, V; Kharlamova, T; Sadykov, V; Bebelis, S

dc.contributor.author	Gasparyan, H	en
dc.contributor.author	Argirusis, Chr	en
dc.contributor.author	Szepanski, Ch	en
dc.contributor.author	Sourkouni, G	en
dc.contributor.author	Stathopoulos, V	en
dc.contributor.author	Kharlamova, T	en
dc.contributor.author	Sadykov, V	en
dc.contributor.author	Bebelis, S	en
dc.date.accessioned	2014-03-01T02:51:59Z
dc.date.available	2014-03-01T02:51:59Z
dc.date.issued	2009	en
dc.identifier.issn	19385862	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35793
dc.subject.other	Ac impedance spectroscopy	en
dc.subject.other	Apatite-type	en
dc.subject.other	Cathode electrodes	en
dc.subject.other	Different process	en
dc.subject.other	Electrocatalytic activity	en
dc.subject.other	Electrochemical characteristics	en
dc.subject.other	Electrochemical characterizations	en
dc.subject.other	Electrolyte powders	en
dc.subject.other	Impedance characteristics	en
dc.subject.other	Impedance data	en
dc.subject.other	Mechano-chemical activation	en
dc.subject.other	Nyquist plots	en
dc.subject.other	Open circuit conditions	en
dc.subject.other	Open circuits	en
dc.subject.other	Oxygen partial pressure	en
dc.subject.other	Pechini method	en
dc.subject.other	Polarization conductance	en
dc.subject.other	Power-law dependences	en
dc.subject.other	Relative contribution	en
dc.subject.other	Apatite	en
dc.subject.other	Electrolysis	en
dc.subject.other	Electrolytes	en
dc.subject.other	Oxygen	en
dc.subject.other	Partial pressure	en
dc.subject.other	Phosphate minerals	en
dc.subject.other	Polarization	en
dc.subject.other	Solid oxide fuel cells (SOFC)	en
dc.subject.other	Electrochemical electrodes	en
dc.title	Electrochemical characterization of a La0.8Sr 0.2Ni0.4Fe0.6O3-δ electrode interfaced with La9.83Si5Al0.75Fe 0.25O26±δ apatite-type electrolyte	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1149/1.3205828	en
heal.identifier.secondary	http://dx.doi.org/10.1149/1.3205828	en
heal.publicationDate	2009	en
heal.abstract	The electrochemical characteristics of a La0.8Sr 0.2Ni0.4Fe0.6O3 cathode electrode interfaced to La9.83Si5Al0.25Fe 0.25O26±δ apatite-type electrolyte were studied using AC impedance spectroscopy under open circuit conditions, at temperatures 600 to 800°C and oxygen partial pressures in the range 0.1 to 20 kPa. The cathode and electrolyte powders were prepared via the Pechini method and the mechanochemical activation method, respectively. The electrocatalytic activity of the tested interface was assessed on the basis of its open circuit area specific polarization conductance R-1, determined from the impedance data. The polarization conductance was found to increase with increasing PO2 , following power law dependence. The impedance characteristics of the system were determined by at least two different processes, corresponding to two partially overlapping depressed arcs in the Nyquist plots. The relative contribution and degree of overlap of these arcs depended on temperature and oxygen partial pressure. ©The Electrochemical Society.	en
heal.journalName	ECS Transactions	en
dc.identifier.doi	10.1149/1.3205828	en
dc.identifier.volume	25	en
dc.identifier.issue	2 PART 3	en
dc.identifier.spage	2681	en
dc.identifier.epage	2688	en