Manufacture of YSZ-LSM Semi-Cell by Colloidal Processing

Laura Gómez; J. Escobar; Maria Teresa Colomer; Rodrigo Moreno

doi:10.4028/www.scientific.net/MSF.727-728.746

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Manufacture of YSZ-LSM Semi-Cell by Colloidal...

Manufacture of YSZ-LSM Semi-Cell by Colloidal Processing

Abstract:

Yttria stabilized zirconia (YSZ) is the most common electrolyte in solid oxide fuel cells (SOFC). The planar configuration is widely used for designing single cells, in which a thick cathode layer can be used as the supporting electrolyte film. The manufacture of the semi-cell formed by anode and electrolyte has been widely studied and there are many works dealing with its colloidal processing. However, the semi-cell formed by cathode and electrolyte has received much lower attention. This work deals with the manufacture of a semi-cell consisting of YSZ as electrolyte and strontium-doped lanthanum manganite (LSM) as a cathode through a colloidal processing route. The colloidal behavior of diluted suspensions of YSZ and the rheology of their concentrated suspensions were studied as a function of deflocculant content, mixing time by using ultrasounds probe and ageing time. The colloidal stability of aqueous suspensions of LSM was studied by measuring the zeta potential as a function of pH and deflocculant content. These concentrated suspensions were used to obtain thick self-sustained substrates by casting methods. The YSZ electrolyte and LSM cathode were prepared by tape casting in water medium.

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Periodical:

Materials Science Forum (Volumes 727-728)

Pages:

746-751

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.746

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Online since:

August 2012

Authors:

Laura Gómez, J. Escobar, Maria Teresa Colomer, Rodrigo Moreno

Keywords:

Ceramic Processing, LSM, Solid Oxide Fuel Cell (SOFC), Suspensions, YSZ

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