Strongly enhanced oxygen ion transport through samarium-doped CeO2 nanopillars in nanocomposite films

Yang, Sangmo; Lee, Shinbuhm; Jian, Jie; Zhang, Wenrui; Lu, Ping; Jia, Quanxi; Wang, Haiyan; Noh, Tae Won; Kalinin, Sergei V.; MacManus-Driscoll, Judith L.

doi:10.1038/ncomms9588

Title: Strongly enhanced oxygen ion transport through samarium-doped CeO₂ nanopillars in nanocomposite films

Journal Article · Thu Oct 08 00:00:00 EDT 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms9588· OSTI ID:1223073

Yang, Sangmo ^[1]; Lee, Shinbuhm ^[2]; Jian, Jie ^[3]; Zhang, Wenrui ^[3]; Lu, Ping ^[4]; Jia, Quanxi ^[5]; Wang, Haiyan ^[3]; Noh, Tae Won ^[6]; Kalinin, Sergei V. ^[1]; MacManus-Driscoll, Judith L. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Cambridge (United Kingdom)
Texas A & M Univ., College Station, TX (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Seoul National Univ. (Korea, Republic of)

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. In conclusion, this work offers a pathway to realize spatially localized fast ion transport in oxides of micrometre thickness.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science; Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); European Research Council (ERC); National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725; AC52-06NA25396; AC04-94AL85000; ERC-2009-AdG-247276-NOVOX; NSF-1007969; DMR-1401266

OSTI ID:: 1223073

Alternate ID(s):: OSTI ID: 1236041; OSTI ID: 1340268

Report Number(s):: LA-UR-15-27228; SAND-2016-12739J; KC0403040; ERKCZ01

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 116 works

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Title: Strongly enhanced oxygen ion transport through samarium-doped CeO2 nanopillars in nanocomposite films

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Title: Strongly enhanced oxygen ion transport through samarium-doped CeO₂ nanopillars in nanocomposite films