Preparation of Hydrogen Electrodes of Solid Oxide Cells by Infiltration: Effects of the Preparation Procedure on the Resulting Microstructure - Publication - Bridge of Knowledge

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Preparation of Hydrogen Electrodes of Solid Oxide Cells by Infiltration: Effects of the Preparation Procedure on the Resulting Microstructure

Abstract

In this work, the infiltration technique was used to produce hydrogen electrodes for solid oxide cells. Different infiltration methodologies were tested in order to try to shorten the infiltration cycle time. The porous scaffolds used for infiltration were based on highly porous yttria-stabilized zirconia (YSZ) obtained by etching the reduced nickel from the Ni-YSZ cermet in HNO3 acid. The support had a complex structure which included a ~130 µm porous functional layer with small pores and a ~320 µm thick supporting layer with large pores. Infiltrations have been carried out using aqueous nickel nitrate solutions. Various infiltration procedures were used, differing in temperature/time profiles. The results show that slow evaporation is crucial for obtaining a homogeneous material distribution leading to high-quality samples. A longer evaporation time promotes the proper distribution of nickel throughout the porous scaffold. The shortening of the heat treatment procedure leads to blockage of the pores and not-uniform nickel distribution.

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DOI:
Digital Object Identifier (open in new tab) 10.3390/ma13010131
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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
Materials no. 13, pages 1 - 11,
ISSN: 1996-1944
Language:
English
Publication year:
2020
Bibliographic description:
Hołówko B., Karczewski J., Molin S., Jasiński P.: Preparation of Hydrogen Electrodes of Solid Oxide Cells by Infiltration: Effects of the Preparation Procedure on the Resulting Microstructure// Materials -Vol. 13,iss. 1 (2020), s.1-11
DOI:
Digital Object Identifier (open in new tab) 10.3390/ma13010131
Verified by:
Gdańsk University of Technology

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