Electrochemical properties of doped lantanum-nickelate-based electrodes / Kol'chugin A. A.,Pikalova E. Yu.,Bogdanovich N. M.,Bronin D. I.,Filonova E. A. // RUSSIAN JOURNAL OF ELECTROCHEMISTRY. - 2017. - V. 53, l. 8. - P. 826-833.

ISSN/EISSN:

1023-1935 / 1608-3342

Type:

Article

Abstract:

This work is devoted to the studying of effects of La2NiO4 doping with alkaline-earth elements: Ca, Sr, and Ba (at an amount of 15 mol \%) on its structural, electrical, and electrochemical properties. The effects of the alkaline-earth element nature, introduction of the Ce0.8Sm0.2O1.9-electrolyte (SDC) component to the functional layer, and the presence of collecting film onto electrochemical activity of the electrodes contacting the Ce0.8Sm0.2O1.9-electrolyte are examined. The doping was found to increase the La2NiO4 full conductivity due to increase in the hole conductivity. The maximal conductivity (at the sample density of 86-89\%) was obtained for the Ca-doped composition: 85 S/Nm at 700A degrees C, as compared with 65 S/Nm for undoped La2NiO4. at the same time, the doping was found to deteriorate the electrodes' electrochemical activity which is likely to be due to loss of interstitial oxygen as a result of the doping. The using of composite electrodes allows increasing polarization conductivity markedly. For instance, at 700A degrees D the conductivity of La2NiO4 is 0.25 S/Nm(2); of its based composite, 0.67 S/Nm(2).

Author keywords:

solid-oxide fuel cells; cathodes; La2NiO4+delta; La1.7Ca0.3NiO4+delta; La1.7Sr0.3NiO4+delta; La1.7Ba0.3NiO4+delta; polarization conductivity OXIDE FUEL-CELLS; ELECTRICAL-PROPERTIES; PHYSICAL-PROPERTIES; SOLID ELECTROLYTES; CRYSTAL-CHEMISTRY; LA2NIO4+DELTA; CATHODES; SR; PERFORMANCE; IMPEDANCE

DOI:

10.1134/S1023193517080110

Web of Science ID:

ISI:000409010200005

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3342
Keywords-Plus	OXIDE FUEL-CELLS; ELECTRICAL-PROPERTIES; PHYSICAL-PROPERTIES; SOLID ELECTROLYTES; CRYSTAL-CHEMISTRY; LA2NIO4+DELTA; CATHODES; SR; PERFORMANCE; IMPEDANCE
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	laba50@mail.ru
ORCID-Numbers	Pikalova, Elena/0000-0001-8176-9417
Funding-Acknowledgement	RFBR {[}14-03-00414]; Act 211 of the Government of Russian Federation {[}02.A03.21.0006]
Funding-Text	This work is performed (in part) using equipment from the common use centers ``The Matter Composition{''} of the Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, and ``Ural-M{''} of the Institute of Metallurgy, Ural Branch, Russian Academy of Sciences. The reported study was funded by RFBR according to the research project No 14-03-00414 and the Act 211 of the Government of Russian Federation, contract no. 02.A03.21.0006.
Number-of-Cited-References	26
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	5
Journal-ISO	Russ. J. Electrochem.
Doc-Delivery-Number	FF5GR