|
1
|
Genreith‐Schriever AR, Parras JP, Heelweg HJ, De Souza RA. The Intrinsic Structural Resistance of a Grain Boundary to Transverse Ionic Conduction. ChemElectroChem 2020. [DOI: 10.1002/celc.202000773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Jana P. Parras
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52056 Aachen Germany
| | - Henrik J. Heelweg
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52056 Aachen Germany
| | - Roger A. De Souza
- Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52056 Aachen Germany
| |
Collapse
|
|
2
|
Bowman WJ, Kelly MN, Rohrer GS, Hernandez CA, Crozier PA. Enhanced ionic conductivity in electroceramics by nanoscale enrichment of grain boundaries with high solute concentration. NANOSCALE 2017; 9:17293-17302. [PMID: 29090719 DOI: 10.1039/c7nr06941c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The enhancement of oxygen ionic conductivity by over two orders of magnitude in an electroceramic oxide is explicitly shown to result from nanoscale enrichment of a grain boundary layer or complexion with high solute concentration. A series of CaxCe1-xO2-δ polycrystalline oxides with fluorite structure and varying nominal Ca2+ solute concentration elucidates how local grain boundary composition, rather than structural grain boundary character, primarily regulates ionic conductivity. A correlation between high grain boundary solute concentration above ∼40 mol%, and four orders of magnitude increase in grain boundary conductivity is explicitly shown. A correlated experimental approach provides unique insights into fundamental grain boundary science, and highlights how novel aspects of nanoscale grain boundary design may be employed to control ion transport properties in electroceramics.
Collapse
Affiliation(s)
- William J Bowman
- School for Engineering of Matter, Transport and Energy, Arizona State University, 501 E. Tyler Mall, Tempe, Arizona 85287-6106, USA.
| | | | | | | | | |
Collapse
|
|
3
|
D’Angelo AM, Webster NAS, Chaffee AL. Vacancy Generation and Oxygen Uptake in Cu-Doped Pr-CeO2 Materials using Neutron and in Situ X-ray Diffraction. Inorg Chem 2016; 55:12595-12602. [DOI: 10.1021/acs.inorgchem.6b01499] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anita M. D’Angelo
- Cooperative Research
Centre for Greenhouse Gas Technologies (CO2CRC), School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Nathan A. S. Webster
- CSIRO Mineral Resources, Private Bag 10, Clayton South, Victoria 3169, Australia
| | - Alan L. Chaffee
- Cooperative Research
Centre for Greenhouse Gas Technologies (CO2CRC), School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| |
Collapse
|
|
4
|
Yang SM, Lee S, Jian J, Zhang W, Lu P, Jia Q, Wang H, Won Noh T, Kalinin SV, MacManus-Driscoll JL. Strongly enhanced oxygen ion transport through samarium-doped CeO2 nanopillars in nanocomposite films. Nat Commun 2015; 6:8588. [PMID: 26446866 PMCID: PMC4633963 DOI: 10.1038/ncomms9588] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 09/09/2015] [Indexed: 12/19/2022] Open
Abstract
Enhancement of oxygen ion conductivity in oxides is important for low-temperature (<500 °C) operation of solid oxide fuel cells, sensors and other ionotronic devices. While huge ion conductivity has been demonstrated in planar heterostructure films, there has been considerable debate over the origin of the conductivity enhancement, in part because of the difficulties of probing buried ion transport channels. Here we create a practical geometry for device miniaturization, consisting of highly crystalline micrometre-thick vertical nanocolumns of Sm-doped CeO2 embedded in supporting matrices of SrTiO3. The ionic conductivity is higher by one order of magnitude than plain Sm-doped CeO2 films. By using scanning probe microscopy, we show that the fast ion-conducting channels are not exclusively restricted to the interface but also are localized at the Sm-doped CeO2 nanopillars. This work offers a pathway to realize spatially localized fast ion transport in oxides of micrometre thickness.
Collapse
Affiliation(s)
- Sang Mo Yang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea
| | - Shinbuhm Lee
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, UK
| | - Jie Jian
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Wenrui Zhang
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Ping Lu
- Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
| | - Quanxi Jia
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Haiyan Wang
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - Tae Won Noh
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-742, Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea
| | - Sergei V. Kalinin
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Judith L. MacManus-Driscoll
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, UK
| |
Collapse
|
|
5
|
Sun L, Marrocchelli D, Yildiz B. Edge dislocation slows down oxide ion diffusion in doped CeO2 by segregation of charged defects. Nat Commun 2015; 6:6294. [DOI: 10.1038/ncomms7294] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 01/15/2015] [Indexed: 12/11/2022] Open
|
|
6
|
Avila-Paredes HJ, Barrera-Calva E, Anderson HU, De Souza RA, Martin M, Munir ZA, Kim S. Room-temperature protonic conduction in nanocrystalline films of yttria-stabilized zirconia. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00051e] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|