Publication
Article Metrics
Citations
Online attention
Single sublattice endotaxial phase separation driven by charge frustration in a complex oxide
Authors:
Antoine
Demont
(University of Liverpool)
,
Ruth
Sayers
(Imperial College London)
,
Maria A.
Tsiamtsouri
(University of Liverpool)
,
Simon
Romani
(University of Liverpool)
,
Philip A.
Chater
(Diamond Light Source)
,
Hongjun
Niu
(University of Liverpool)
,
Carlos
Martí-Gastaldo
(University of Liverpool)
,
Zhongling
Xu
(University of Liverpool)
,
Zengqiang
Deng
(University of Liverpool)
,
Yohann
Bréard
(Laboratoire CRISMAT)
,
Michael F.
Thomas
(University of Liverpool)
,
John B.
Claridge
(University of Liverpool)
,
Matthew J.
Rosseinsky
(University of Liverpool)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of The American Chemical Society
, VOL 135 (27)
, PAGES 10114 - 10123
State:
Published (Approved)
Published:
July 2013

Abstract: Complex transition-metal oxides are important functional materials in areas such as energy and information storage. The cubic ABO3 perovskite is an archetypal example of this class, formed by the occupation of small octahedral B-sites within an AO3 network defined by larger A cations. We show that introduction of chemically mismatched octahedral cations into a cubic perovskite oxide parent phase modifies structure and composition beyond the unit cell length scale on the B sublattice alone. This affords an endotaxial nanocomposite of two cubic perovskite phases with distinct properties. These locally B-site cation-ordered and -disordered phases share a single AO3 network and have enhanced stability against the formation of a competing hexagonal structure over the single-phase parent. Synergic integration of the distinct properties of these phases by the coherent interfaces of the composite produces solid oxide fuel cell cathode performance superior to that expected from the component phases in isolation.
Journal Keywords: Single Sublattice Endotaxial Phase Separation Driven By Charge Frustration In A Complex Oxide
Diamond Keywords: Fuel Cells
Subject Areas:
Chemistry,
Materials,
Energy
Instruments:
I11-High Resolution Powder Diffraction
Added On:
20/08/2013 12:36
Documents:
ja403611s.pdf
Discipline Tags:
Energy Storage
Energy
Physical Chemistry
Energy Materials
Chemistry
Materials Science
Perovskites
Metallurgy
Technical Tags:
Diffraction
X-ray Powder Diffraction