Performance of perovskite-related oxide cathodes in contact with lanthanum silicate electrolyte / Yaremchenko A. A.,Kharton V. V.,Bannikov D. O.,Znosak D. V.,Frade J. R.,Cherepanov V. A. // SOLID STATE IONICS. - 2009. - V. 180, l. 11-13. - P. 878-885.

ISSN/EISSN:

0167-2738 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The cathodic performance of selected mixed-conducting electrodes, including perovskite-type SrMn(0.6)Nb(0.4)O(3 - delta), Sr(0.7)CeO(3)Mn(0.9)Cr(0.1)O(3) (- delta) and Gd(0.6)Ca(0.4)Mn(0.9)Ni(0.1)O(3 - delta), and Ruddlesden-Popper La(2)Ni(0.5)Cu(0.5)O(4) (+) (delta), LaSr(2)Mn(1.6)Ni(0.4)O(7 - delta) La(4)Ni(3 - x)Cu(x)O(10 - delta) (x=0-0.1) and La(3.95)Sr(0.05)Ni(2)CoO(10 - delta) was evaluated in contact with apatite-type La(10)Si(5)AlO(26.5) solid electrolyte at 873-1073 K and atmospheric oxygen pressure. The electrochemical activity of porous nickelate-based layers was found to correlate with the concentration of mobile ionic charge carriers and bulk oxygen transport, thus lowering in the series La(4)Ni(2.9)Cu(0.1)O(10 - delta) > La(4)Ni(3)O(10 - delta) > La(3.95)Sr(0.05)Ni(2)CoO(10 - delta) and decreasing on copper doping in K(2)NiF(4)-type La(2)Ni(1 - x)Cu(x)O(4 - delta). The relatively high overpotentials of nickelate-based cathodes, varying in the range - 240 to - 370 mV at 1073 K and current density of - 200 mA/cm(2), are primarily associated with surface diffusion of silica from La(10)Si(5)AlO(26.5), which partially blocks the electrochemical reaction zone. As compared to the intergrowth nickelate materials, the manganite-based electrodes exhibit substantially worse electrochemical properties, in correlation with the level of oxygen-ionic and electronic conduction in Mn-containing phases. The effects of cation interdiffusion between the cell components as a performance-deteriorating factor are briefly discussed. (C) 2009 Elsevier B.V. All rights reserved.

Author keywords:

Solid oxide fuel cell cathode; Mixed conductor; Perovskite; Ruddlesden-Popper nickelate; Apatite-type solid electrolyte; Electrode polarization; Silicate FUEL-CELLS; ELECTRICAL-PROPERTIES; TRANSPORT-PROPERTIES; OXYGEN PERMEABILITY; REACTION-MECHANISMS; IONIC-CONDUCTIVITY; EXPANSION; SYSTEM; GD; ND

DOI:

10.1016/j.ssi.2009.02.022

Web of Science ID:

ISI:000267673800024

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUN 22
Note	Electroceramics XI Conference, Univ Manchester, Manchester, ENGLAND, AUG 31-SEP 04, 2008
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	FUEL-CELLS; ELECTRICAL-PROPERTIES; TRANSPORT-PROPERTIES; OXYGEN PERMEABILITY; REACTION-MECHANISMS; IONIC-CONDUCTIVITY; EXPANSION; SYSTEM; GD; ND
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Author-Email	ayaremchenko@ua.pt
ResearcherID-Numbers	Yaremchenko, Aleksey/H-2977-2013 Cherepanov, Vladimir/E-6451-2014 Kharton, Vladislav /P-6306-2014
ORCID-Numbers	Yaremchenko, Aleksey/0000-0002-3837-5946 Cherepanov, Vladimir/0000-0003-3653-6459 Kharton, Vladislav/0000-0002-8691-174X Frade, Jorge/0000-0001-8445-2562
Number-of-Cited-References	30
Usage-Count-Since-2013	18
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	466PF