Fabrication and electrochemical properties of SOFC single cells using porous yttria-stabilized zirconia ceramic support layer coated with Ni

Autor:	Sung-Youl Kim, Qing Xu, Spencer S. Kim, Jae-Hak Jung, Bok-Hee Kim, Byung-Guk Ahn, Myong-Jin Lee, Kai Zhao
Rok vydání:	2014
Předmět:	Materials science Electrolyte Microstructure Cathode Anode law.invention law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Cubic zirconia Ceramic Composite material Porosity Yttria-stabilized zirconia
Zdroj:	Journal of the European Ceramic Society. 34:1771-1776
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2013.12.042
Popis:	A porous yttria-stabilized zirconia (YSZ) ceramic supported single cell with a configuration of porous YSZ support layer coated with Ni/Ni–Ce0.8Sm0.2O1.9 (SDC) anode/YSZ/SDC bi-layer electrolyte/La0.6Sr0.4Co0.2Fe0.8O3−δ cathode was fabricated. The porosity, mechanical strength, and microstructure of porous YSZ ceramics were investigated with respect to the amount of poly(methyl methacrylate) (PMMA) used as a pore former. Porous YSZ ceramics with 56 vol.% PMMA showed a mechanical strength of 24 ± 3 MPa and a porosity of 37 ± 1%. The electrochemical properties of the single cell employing the porous YSZ support layer were measured using hydrogen and methane fuels, respectively. The single cell exhibited maximum power densities of 421 mW/cm2 in hydrogen and 399 mW/cm2 in methane at 800 °C. Moreover, at a current density of 550 mA/cm2, the cell maintained 91% of its initial voltage after operation in methane for 13 h at 700 °C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::de8906f6796a26f48963169e942a2f1e https://doi.org/10.1016/j.jeurceramsoc.2013.12.042 Zobrazit plný text záznamu Full Text from ScienceDirect