Oxide cathodes for electrochemical devices made with the use of a nanostructured composition material / Yaroslavtsev I. Yu.,Bronin D. I.,Vdovin G. K.,Isupova L. A. // RUSSIAN JOURNAL OF ELECTROCHEMISTRY. - 2012. - V. 48, l. 10. - P. 981-985.

ISSN/EISSN:

1023-1935 / нет данных

Type:

Article

Abstract:

The possibility of using the LnO (x) mischmetal (Ln = Ce, La, Nd, Pr, Sm) for preparation of cathodes for solid-oxide fuel cells with the supported YSZ electrolyte is studied. The electrical and electrochemical characteristics of Ln-Mn-O electrodes with the ratio of all lanthanides contained in the mischmetal except for cerium to manganese Ln: Mn = 1: 1 and also of a material comprised of Ln-Mn-O and La0.8Sr0.2MnO3 are studied. The latter electrode material that contains 35-40 wt \% of Ln-Mn-O and was sintered at 1200A degrees C has the specific ohmic resistance of 0.1 Omega cm at 800A degrees C. The polarization conductivity is compared for electrodes made of 100\% Ln-Mn-O, 40 wt \% Ln-Mn-O + 60 wt \% La0.8Sr0.2MnO3, and 100\% La0.8Sr0.2MnO3 in the initial state and after their modification through the introduction of an electrocatalyst (PrO2 - x ). The highest polarization conductivity is typical of Ln-Mn-O + (La, Sr)MnO3 electrodes containing 40 wt \% Ln-Mn-O and PrO2 - x . The polarization conductivity of these electrodes is found to be 25 S/cm(2) at 800A degrees C.

Author keywords:

mischmetal; (La,Sr)MnO3; nanostructured composite; electrocatalytic additive PrO2-x; ohmic resistance; electrochemical activity

DOI:

10.1134/S1023193512100138

Web of Science ID:

ISI:000310022400005

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	yaroslav@ihte.uran.ru
ResearcherID-Numbers	Isupova, Lyubov/E-9273-2012
Funding-Acknowledgement	presidium of the Ural Branch of the Russian Academy of Sciences; Siberian Branch of the Russian Academy of Sciences
Funding-Text	This study was financially supported by the presidium of the Ural Branch of the Russian Academy of Sciences for the projects carried out in cooperation with the Siberian Branch of the Russian Academy of Sciences.
Number-of-Cited-References	11
Usage-Count-Since-2013	23
Journal-ISO	Russ. J. Electrochem.
Doc-Delivery-Number	023HB