Characterization of Ni-cermet degradation phenomena I. Long term resistivity monitoring, image processing and X-ray fluorescence analysis / Ananyev M. V.,Bronin D. I.,Osinkin D. A.,Eremin V. A.,Steinberger-Wilckens R.,de Haart L. G. J.,Mertens J. // JOURNAL OF POWER SOURCES. - 2015. - V. 286, l. . - P. 414-426.

ISSN/EISSN:

0378-7753 / 1873-2755

Type:

Article

Abstract:

The present paper is devoted to Ni-cermet degradation phenomena and places emphasis on experimental approaches and data handling. The resistivity of Ni-YSZ cermet (nickel and 8 mol.\% yttria stabilized zirconia) anode substrates was monitored during 3000 h at 700 and 800 degrees C in a gas mixture of 80 vol.\% water vapor and 20 vol.\% hydrogen. The experimentally evaluated dependence of resistivity of the Ni-YSZ substrates can be well described by exponential decay functions. Post test analysis by image processing and XRF (X-ray fluorescence) analysis for characterization of the Microstructure and elemental composition were carried out for virgin samples and after 300, 1000 and 3000 h of exposure time. The 3D-microstructure was reconstructed using an original spheres packing algorithm. Two processes leading to the Ni-YSZ degradation were observed: Ni-phase particle coarsening and volatilization. The effect of these processes on resistivity and such microstructure parameters as porosity, Ni-phase fraction, Ni and YSZ phases particle size distributions, triple phase boundary length, and tortuosity factor are considered in this paper. (C) 2015 Elsevier B.V. All rights reserved.

Author keywords:

Ni-YSZ; Degradation; Microstructure; Image processing; X-ray fluorescence; Solid oxide fuel cell OXIDE FUEL-CELLS; LSM-YSZ COMPOSITE; POROUS-MEDIA; STOCHASTIC RECONSTRUCTION; 3D RECONSTRUCTION; ZIRCONIA ANODE; NICKEL; QUANTIFICATION; TOMOGRAPHY; TEMPERATURE

DOI:

10.1016/j.jpowsour.2015.03.168

Web of Science ID:

ISI:000355027400048

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-2755
Keywords-Plus	OXIDE FUEL-CELLS; LSM-YSZ COMPOSITE; POROUS-MEDIA; STOCHASTIC RECONSTRUCTION; 3D RECONSTRUCTION; ZIRCONIA ANODE; NICKEL; QUANTIFICATION; TOMOGRAPHY; TEMPERATURE
Research-Areas	Chemistry; Electrochemistry; Energy \& Fuels; Materials Science
Web-of-Science-Categories	Chemistry, Physical; Electrochemistry; Energy \& Fuels; Materials Science, Multidisciplinary
Author-Email	m.ananyev@mail.ru
ResearcherID-Numbers	Ananyev, Maxim/F-5104-2014 Eremin, Vadim/L-6709-2017 Steinberger-Wilckens, Robert/G-6909-2017
ORCID-Numbers	Ananyev, Maxim/0000-0002-2254-0193 Eremin, Vadim/0000-0002-1897-4618 Steinberger-Wilckens, Robert/0000-0002-7335-8965
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-08-00363A]; EU {[}256885]
Funding-Text	The research presented in this paper was financially supported by the Russian Foundation for Basic Research (project No. 13-08-00363A), and has received funding within the framework of the EU project ``SOFC-Life{''} (EU FP7/2007-2013, Fuel Cell and Hydrogen Joint Undertaking FCH-JU, project No. 256885). The authors thank A.A. Pankratov for the SEM imaging performed using the facilities of the Shared Access Center ``Composition of Compounds{''} of the Institute of High Temperature Electrochemistry (Yekaterinburg).
Number-of-Cited-References	38
Usage-Count-Since-2013	28
Journal-ISO	J. Power Sources
Doc-Delivery-Number	CI8MW