Novel Cobalt-Free Oxygen-Permeable Perovskite-Type Membrane

被引：88

作者：

Efimov, Konstantin ^{[1
]}

Halfer, Torben

Kuhn, Alexander

Heitjans, Paul

Caro, Juergen

Feldhoff, Armin

机构：

[1] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 04期

关键词：

ELECTROCHEMICAL PROPERTIES; PERMEATION PERFORMANCE; OXIDE; (BA0.5SR0.5)(FE0.8ZN0.2)O3-DELTA; TRANSITION; STABILITY; CATHODE; CONDUCTIVITY; EXPANSION;

D O I：

10.1021/cm902882s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cobalt-free perovskite with the novel composition (Ba0.5Sr0.5)(Fe0.8Cu0.2)O3-delta (BSFCu) was synthesized via a sol-gel method and studied with respect to the crystallographic structure as well as the oxygen ionic and the electronic conductivity. In situ X-ray diffraction (XRD) was applied to investigate the thermal dilatation and the phase stability of the BSFCu at high and intermediate temperatures. Additionally, time-dependent oxygen permeation performance measurements were carried out for BSFCu and Co-based (Ba0.5Sr0.5)(Fe0.8Cu0.2)O3-delta membranes at 1023 K for 200 h. The BSFCu phase was found to be a cubic perovskite by XRD and transmission electron microscopy. The BSFCu membrane exhibits a very high oxygen permeation and electrical conductivity as compared to known perovskite membranes. The oxygen permeation of the BSFCu membrane maintains its value for 200 h at 1023 K unlike (Ba0.5Sr0.5)(Fe0.8Cu0.2)O3-delta, whose oxygen flux was reduced by one-half during the same interval.

引用

页码：1540 / 1544

页数：5

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