Oxygen nonstoichiometry, defect structure and related properties of LaNi0.6Fe0.4O3-delta / Sereda V. V.,Tsvetkov D. S.,Ivanov I. L.,Zuev A. Yu. // JOURNAL OF MATERIALS CHEMISTRY A. - 2015. - V. 3, l. 11. - P. 6028-6037.

ISSN/EISSN:

2050-7488 / 2050-7496

Type:

Article

Abstract:

Experimental results on oxygen nonstoichiometry (delta), thermal and chemical expansion (Delta L/L-0), total electrical conductivity (sigma) and Seebeck coefficient (Q) as functions of the oxygen partial pressure (p(O2)) and temperature for LaNi0.6Fe0.4O3-delta are presented. The defect structure model of LaNi0.6Fe0.4O3-delta based on the localized nature of the electronic defects was proposed and successfully verified using the measured delta = f(p(O2), T) dependences. On the basis of the model proposed the concentrations of the point defects were calculated as functions of the T and p(O2). These concentrations were then employed in the model of chemical expansion and that of Seebeck coefficient. It was shown that both models coincide completely with the corresponding experimental data. The chemical expansion coefficients (beta(c)) and mobilities of the charge carriers (electrons and holes) as functions of T and p(O2) were calculated as a result.

Author keywords:

OXIDE FUEL-CELLS; INDUCED EXPANSION; CHARGE DISPROPORTIONATION; ELECTRICAL-CONDUCTIVITY; CHEMICAL EXPANSION; PEROVSKITE; CATHODE; TRANSITION; NI; LANI1-XFEXO3

DOI:

10.1039/c4ta05882h

Web of Science ID:

ISI:000350886600034

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	ROYAL SOC CHEMISTRY
Address	THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Language	English
EISSN	2050-7496
Keywords-Plus	OXIDE FUEL-CELLS; INDUCED EXPANSION; CHARGE DISPROPORTIONATION; ELECTRICAL-CONDUCTIVITY; CHEMICAL EXPANSION; PEROVSKITE; CATHODE; TRANSITION; NI; LANI1-XFEXO3
Research-Areas	Chemistry; Energy \& Fuels; Materials Science
Web-of-Science-Categories	Chemistry, Physical; Energy \& Fuels; Materials Science, Multidisciplinary
Author-Email	vladimir.sereda@urfu.ru
ResearcherID-Numbers	Tsvetkov, Dmitry/N-2491-2016 Ivanov, Ivan/E-7879-2017 Sereda, Vladimir/J-9810-2014 Zuev, Andrey/E-6220-2014
ORCID-Numbers	Ivanov, Ivan/0000-0001-9277-7543 Sereda, Vladimir/0000-0002-1420-2573
Funding-Acknowledgement	Centres of Excellence Program at Ural Federal University, Russia
Funding-Text	This work was supported by the Centres of Excellence Program at Ural Federal University, Russia.
Number-of-Cited-References	44
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	35
Journal-ISO	J. Mater. Chem. A
Doc-Delivery-Number	CD2EH