Enhancing Oxygen Permeation of Electronically Short-Circuited Oxygen-Ion Conductors by Decorating with Mixed Ionic-Electronic Conducting Oxides

Reasonably high oxygen permeation fluxes, ∼4 × 10−2 μmol.cm−2.s−1, were obtained from surface decoration with La0.8Sr0.2CoO3-δ (LSC113) or LaSrCoO4±δ (LSC214) on La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-δ (LSGMC) and Ce0.8Sm0.2O2-δ (SDC) membranes at 700°C. Promoting surface exchange kinetics at the feed sid...

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Bibliographic Details
Published in:ECS electrochemistry letters 2013-08, Vol.2 (11), p.F77-F81
Main Authors: Wang, Lei, Imashuku, Susumu, Grimaud, Alexis, Lee, Dongkyu, Mezghani, Khaled, Habib, Mohamed A., Shao-Horn, Yang
Format: Article
Language:English
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Summary:Reasonably high oxygen permeation fluxes, ∼4 × 10−2 μmol.cm−2.s−1, were obtained from surface decoration with La0.8Sr0.2CoO3-δ (LSC113) or LaSrCoO4±δ (LSC214) on La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-δ (LSGMC) and Ce0.8Sm0.2O2-δ (SDC) membranes at 700°C. Promoting surface exchange kinetics at the feed side of LSGMC and SDC membranes, which was found rate-limiting, is needed to further enhance oxygen permeation of these membranes. This work demonstrates the possibility of reducing the amount of noble metal usage for membranes based on the concept of short-circuited ion conductors and shows promise for the development of noble-metal-free permeation membranes.
ISSN:2162-8726
2162-8734
DOI:10.1149/2.002311eel