Electrochemical performance of mixed ionic-electronic conducting oxides as anodes for solid oxide fuel cell
Data(s) |
01/05/1999
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Resumo |
Mixed ionic-electronic conducting (MIEC) oxides, SrFeCo0.5Ox, SrCo0.8Fe0.2O3-delta and La0.6Sr0.4Fe0.8Co0.2O3-delta have been synthesized and prepared on yttria-stabilized zirconia as anodes for solid oxide fuel cells. Power output measurements show that the anodes composed of such kinds of oxides exhibit modest electrochemical activities to both H-2 and CH4 fuels, giving maximum power densities of around 0.1 W/cm(2) at 950 degrees C. Polarization and AC impedance measurements found that large activation overpotentials and ohmic resistance drops were the main causes for the relative inferior performance to the Ni-YSZ anode. While interlayered with an Ni-YSZ anode, a significant improvement in the electrochemical performance was observed. in particular, for the SrFeCo0.5Ox oxide interlayered Ni-YSZ anode, the maximum power output reaches 0.25 W/cm2 on CH,, exceeding those of both SrFeCo0.5Ox and the Ni-YSZ, as anodes alone. A synergetic effect of SrFeCo0.5Ox and the Ni-YSZ has been observed. Future work is needed to examine the long-term stability of MIEC oxide electrodes under a very reducing environment. (C) 1999 Elsevier Science B.V. All rights reserved. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
王世忠* 江义 张雅虹* 李文钊 闫景旺 卢自桂.Electrochemical performance of mixed ionic-electronic conducting oxides as anodes for solid oxide fuel cell,Solid State Ionics; 120(1999)75-84,1999,():- |
Palavras-Chave | #mixed ionic-electronic conducting oxides #anodes #methane oxidation #solid oxide fuel cell |
Tipo |
期刊论文 |