Solid Oxide Fuel Cell Composite Cathodes Based on Perovskite and Fluorite Structures
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
9th European Solid Oxide Fuel Cell Forum
29 Jun - 2 Jul 2010
,
Lucerne
|
| Journal |
Journal of Power Sources
ISSN: 0378-7753
|
| Output data |
Year: 2011,
Volume: 196,
Number: 17,
Pages: 7104-7109
Pages count
: 6
DOI:
10.1016/j.jpowsour.2010.07.096
|
| Tags |
Cathode nanocomposites, Cell performance, Oxygen mobility, Radiation-thermal sintering, SOFC, Ultrasonic treatment |
| Authors |
Sadykov Vladislav
1,2
,
Mezentseva Natalia
1
,
Usoltsev Vladimir
1
,
Sadovskaya Ekaterina
1
,
Ishchenko Arkady
1
,
Pavlova Svetlana
1
,
Bespalko Yulia
1
,
Kharlamova Tamara
1
,
Zevak Ekaterina
1,2
,
Salanov Aleksei
1
,
Krieger Tamara
1
,
Belyaev Vladimir
1
,
Bobrenok Oleg
3
,
Uvarov Nikolai
4
,
Okhlupin Yury
4
,
Smorygo Oleg
5
,
Smirnova Alevtina
6
,
Singh Prabhakar
7
,
Vlasov Aleksandr
8
,
Korobeynikov Mikhail
8
,
Bryazgin Aleksandr
8
,
Kalinin Peter
8
,
Arzhannikov Andrei
8
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russian Federation
|
| 2 |
Novosibirsk State University, Novosibirsk, 630090, Russian Federation
|
| 3 |
Institute of Thermal Physics SB RAS, Novosibirsk, 630090, Russian Federation
|
| 4 |
Institute of Solid State Chemistry and Mechanical Activation, Novosibirsk, 630090, Russian Federation
|
| 5 |
Powder Metallurgy Institute, Minsk, Belarus
|
| 6 |
Eastern Connecticut State University, Willimantic, CT, USA
|
| 7 |
University of Connecticut, Storrs, CT, USA
|
| 8 |
Budker Institute of Nuclear Physics, Novosibirsk, 630090, Russian Federation
|
|
Funding (3)
|
1
|
European Commission
|
20089 FP6-2004-ENERGY-3 SOFC600
|
|
2
|
Президиум РАН
|
57
|
|
3
|
North Atlantic Treaty Organization
|
SfP-980878
|
This work presents the results related to the functionally graded fluorite (F)–perovskite (P) nanocomposite cathodes for IT SOFC. Nanocrystalline fluorites (GDC, ScCeSZ) and perovskites (LSrMn, LSrFNi) were synthesized by Pechini method. Nanocomposites were prepared by the ultrasonic dispersion of F and P powders in isopropanol with addition of polyvinyl butyral. Different techniques for deposition and sintering of functionally graded cathode materials were applied including traditional approaches as well as original methods, such as radiation–thermal sintering under electron beam or microwave radiation. Morphology, microstructure and elemental composition of nanocomposites was characterized by XRD and HRTEM/SEM with EDX. Even for dense composites, the sizes of perovskite and fluorite domains remain in the nanorange providing developed P–F interfaces. Oxygen isotope heteroexchange and conductivity/weight relaxation studies demonstrated that these interfaces provide a path for fast oxygen diffusion. The redistribution of the elements between P and F phases in nanocomposites occurs without formation of insulating zirconate phases. Button-size fuel cells with nanocomposite functionally graded cathodes, thin YSZ layers and anode Ni/YSZ cermet (either bulk or supported on Ni–Al foam substrates) were manufactured. For optimized composition and functionally graded design of P–F nanocomposite cathodes, a stable performance in the intermediate temperature range with maximum power density up to 0.5 W cm−2 at 700 °C in wet H2/air feeds was demonstrated