Imperial College London
Alternate

ProfessorJohnKilner

Faculty of Engineering, Department of Materials

Senior Research Investigator
 
 
 
//

Contact

 

+44 (0)20 7594 6745j.kilner Website

 
 
//

Location

 

214Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Pergolesi:2018:10.1021/acsami.8b01903,
author = {Pergolesi, D and Gilardi, E and Fabbri, E and Roddatis, V and Harrington, GF and Lippert, T and Kilner, JA and Traversa, E},
doi = {10.1021/acsami.8b01903},
journal = {ACS Appl Mater Interfaces},
pages = {14160--14169},
title = {Interface effects on the ionic conductivity of doped ceria-yttria-stabilized zirconia heterostructures},
url = {http://dx.doi.org/10.1021/acsami.8b01903},
volume = {10},
year = {2018}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Multilayered heterostructures of Ce0.85Sm0.15O2-δ and Y0.16Zr0.92O2-δ of a high crystallographic quality were fabricated on (001)-oriented MgO single crystal substrates. Keeping the total thickness of the heterostructures constant, the number of ceria-zirconia bilayers was increased while reducing the thickness of each layer. At each interface Ce was found primarily in the reduced, 3+ oxidation state in a layer extending about 2 nm from the interface. Concurrently, the conductivity decreased as the thickness of the layers was reduced, suggesting a progressive confinement of the charge transport along the YSZ layers. The comparative analysis of the in-plane electrical characterization suggests that the contribution to the total electrical conductivity of these interfacial regions is negligible. For the smallest layer thickness of 2 nm the doped ceria layers are electrically insulating and the ionic transport only occurs through the zirconia layers. This is explained in terms of a reduced mobility of the oxygen vacancies in the highly reduced ceria.
AU  - Pergolesi,D
AU  - Gilardi,E
AU  - Fabbri,E
AU  - Roddatis,V
AU  - Harrington,GF
AU  - Lippert,T
AU  - Kilner,JA
AU  - Traversa,E
DO  - 10.1021/acsami.8b01903
EP  - 14169
PY  - 2018///
SN  - 1944-8244
SP  - 14160
TI  - Interface effects on the ionic conductivity of doped ceria-yttria-stabilized zirconia heterostructures
T2  - ACS Appl Mater Interfaces
UR  - http://dx.doi.org/10.1021/acsami.8b01903
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29617562
UR  - http://hdl.handle.net/10044/1/59317
VL  - 10
ER  -
Download