Nanocomposite Cathodes for Intermediate Temperature Solid Oxide Fuel Cells | Sciact - CRIS-system of Boreskov Institute of Catalysis

Nanocomposite Cathodes for Intermediate Temperature Solid Oxide Fuel Cells Conference Abstracts

Conference

246th ACS National Meeting & Exposition
08-12 Sep 2013 , Indianapolis, Indiana

Source

Abstracts of Papers, 246th ACS National Meeting & Exposition, Indianapolis, IN, United States, September 8-12, 2013
Compilation, American Chemical Society. Washington, D. C.2013.

Output data

Year: 2013, Article number : COLL-329, Pages count : 1

Authors

Smirnova A.L. ¹ , Sadykov V.A. ^2,3 , Usoltsev V.V. ^2,3 , Eremeev N.F. ² , Sadovskaya E.M. ² , Belyaev V.D. ² , Muzykantov V.S. ² , Pelipenko V.V. ² , Ishchenko A.V. ² , Krieger T.A. ² , Gulyaev A. ² , Ulikhin A.S. ⁴ , Uvarov N.F. ⁴ , Okhlupin Y.S. ⁴ , Antipov E. ⁵ , Mertens J. ⁶ , Vinke I.C. ⁶

Affiliations

1	South Dakota School of Mines and Technology
2	Boreskov Institute of Catalysis SB RAS
3	Novosibirsk National Research University
4	Institute of Solid State Chemistry and Mechanochemistry SB RAS
5	Lomonosov Moscow State University
6	Jülich Research Centre

The work is focused on design and characterization of mixed ionic-electronic conducting perovskite-fluorite nanocomposite ceramics as functional cathode layers in SOFC. Nanocryst. complex oxides with ionic cond. (YSZ, ScCeSZ, GDC, etc) and mainly electronic cond. (Ln1-xSrxMe11-yMe2yO3, Ln2MeO4, Ln= La, Pr; Me1,2 = Mn, Co, Ni, Cu, Fe) were supported on electrolytes by slip casting, screen-printing, and air brushing. The sintered functional layers were studied by HRTEM and SEM/EDS, XRD, and XPS. Redistribution of elements between perovskite-like and electrolyte domains was revealed. Transport properties of perovskite-like oxides and nanocomposite ceramics were characterized by impedance spectroscopy for anal. of cond. or wt. variation after changing the oxygen partial pressure in the gas phase. Oxygen isotope heteroexchange with 18O2 and C18O2 in static as well as flow reactors (SSITKA mode) was applied to est. the oxygen self-diffusion coeffs. and the specific rate of surface reaction. Ruddlesden-Popper type nickelates Pr2-xNiO4+z demonstrated the highest oxygen mobility due to cooperative mechanism of interstitial oxygen migration. For nanocomposites, redistribution of cations between perovskite-like and electrolyte domains generates new active surface sites for O2 mols. activation. For Ruddlesden-Popper type nickelates, substitution of Pr and Ni cations by electrolyte cations results in decreasing oxygen mobility due to hampering oxygen migration via cooperative non-linear routes. For optimized combinations of perovskite-electrolyte, the interfaces were shown to be paths for fast oxygen diffusion with oxygen diffusion coeffs. exceeding those within perovskite or electrolyte domain by up to 6 orders of magnitude. The best perovskite-fluorite combinations with highest oxygen mobility were tested in SOFCs. SOFCs with nanocomposite cathode layers on ScCeSZ electrolyte demonstrated max. power d. of 600-800 mW/cm2 at 700 °C in wet H2/air feeds.Support by Integration Projects SB RAS-Belarus NAS, German-Russian Project NCATH of CLIENT Program and Russian Federal Program "Scientific and Educational Cadres of Russia" is gratefully acknowledged.

Smirnova A.L. , Sadykov V.A. , Usoltsev V.V. , Eremeev N.F. , Sadovskaya E.M. , Belyaev V.D. , Muzykantov V.S. , Pelipenko V.V. , Ishchenko A.V. , Krieger T.A. , Gulyaev A. , Ulikhin A.S. , Uvarov N.F. , Okhlupin Y.S. , Antipov E. , Mertens J. , Vinke I.C.
Nanocomposite Cathodes for Intermediate Temperature Solid Oxide Fuel Cells
In compilation Abstracts of Papers, 246th ACS National Meeting & Exposition, Indianapolis, IN, United States, September 8-12, 2013. – American Chemical Society., 2013. WOS AN

Published print:

Sep 1, 2013

Web of science:	WOS:000329618402347
Chemical Abstracts:	2013:1361842

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