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

被引：15
|
作者：
Wang, Lei [1 ]
Imashuku, Susumu [1 ]
Grimaud, Alexis [1 ]
Lee, Dongkyu [1 ]
Mezghani, Khaled [2 ]
Habib, Mohamed A. [2 ]
Shao-Horn, Yang [1 ]
机构：
[1] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA
[2] King Fahd Univ Petr & Minerals, Dept Mech Engn, Dhahran 31261, Saudi Arabia
来源：
ECS ELECTROCHEMISTRY LETTERS | 2013年 / 2卷 / 11期
关键词：
CERAMIC MEMBRANES; SURFACE; REDUCTION; TRANSPORT; MICROSTRUCTURE; PERMEABILITY; ENHANCEMENT; SEPARATION; INTERFACE; STABILITY;
D O I：
10.1149/2.002311eel
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Reasonably high oxygen permeation fluxes, similar to 4 x 10(-2) mu mol.cm(-2).s(-1), were obtained from surface decoration with La0.8Sr0.2CoO3-delta (LSC113) or LaSrCoO4 +/-delta (LSC214) on La0.8Sr0.2Ga0.8Mg0.115Co0.085O3-delta (LSGMC) and Ce0.8Sm0.2O2-delta (SDC) membranes at 700 degrees 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. (C) 2013 The Electrochemical Society. All rights reserved.
引用
收藏
页码：F77 / F81
页数：5
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