A CO2 -Tolerant Perovskite Oxide with High Oxide Ion and Electronic Conductivity

A CO2 -Tolerant Perovskite Oxide with High Oxide Ion and Electronic Conductivity

© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 4 vom: 06. Jan., Seite e1905200
1. Verfasser: Li, Ming (VerfasserIn)
Weitere Verfasser: Niu, Hongjun, Druce, John, Téllez, Helena, Ishihara, Tatsumi, Kilner, John A, Gasparyan, Hripsime, Pitcher, Michael J, Xu, Wen, Shin, J Felix, Daniels, Luke M, Jones, Leanne A H, Dhanak, Vin R, Hu, Dingyue, Zanella, Marco, Claridge, John B, Rosseinsky, Matthew J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article mixed ionic-electronic conductors oxygen separation membranes perovskites solid oxide fuel cells surface segregation
Beschreibung
Zusammenfassung:© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Mixed ionic-electronic conductors (MIECs) that display high oxide ion conductivity (σo ) and electronic conductivity (σe ) constitute an important family of electrocatalysts for a variety of applications including fuel cells and oxygen separation membranes. Often MIECs exhibit sufficient σe but inadequate σo . It has been a long-standing challenge to develop MIECs with both high σo and stability under device operation conditions. For example, the well-known perovskite oxide Ba0.5 Sr0.5 Co0.8 Fe0.2 O3- δ (BSCF) exhibits exceptional σo and electrocatalytic activity. The reactivity of BSCF with CO2 , however, limits its use in practical applications. Here, the perovskite oxide Bi0.15 Sr0.85 Co0.8 Fe0.2 O3- δ (BiSCF) is shown to exhibit not only exceptional bulk transport properties, with a σo among the highest for known MIECs, but also high CO2 tolerance. When used as an oxygen separation membrane, BiSCF displays high oxygen permeability comparable to that of BSCF and much higher stability under CO2 . The combination of high oxide transport properties and CO2 tolerance in a single-phase MIEC gives BiSCF a significant advantage over existing MIECs for practical applications
Beschreibung:Date Completed 29.01.2020
Date Revised 01.10.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201905200