Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

Pt dispersion in Pr2NiO4 based oxides formed compressed strain and electrical conductivity decreases, however, the oxide ion conductivity increases by the compressed strain due to the decreased hole and the increased interstitial oxygen concentration.

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The relationship between oxide-ion conductivity and cation vacancy order in the hybrid hexagonal perovskite Ba3VWO8.5

Journal of Materials Chemistry A ◽

10.1039/d0ta05581f ◽

2020 ◽

Vol 8 (32) ◽

pp. 16506-16514 ◽

Cited By ~ 1

Author(s):

Asma Gilane ◽

Sacha Fop ◽

Falak Sher ◽

Ronald I. Smith ◽

Abbie C. Mclaughlin

Keyword(s):

Ionic Conductivity ◽

Long Range ◽

Cation Vacancy ◽

Ion Conductivity ◽

Cation Ordering ◽

Oxygen Diffusivity ◽

Oxide Ion Conductivity ◽

The Relationship ◽

Oxide Ion

Cation ordering in Ba3VWO8.5 disrupts long-range oxygen diffusivity parallel to the c-axis resulting in reduced ionic conductivity.

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Structural origin of the enhanced ionic conductivity upon Nb doping in Sr11Mo4O23 defective double perovskite

Dalton Transactions ◽

10.1039/c7dt00340d ◽

2017 ◽

Vol 46 (12) ◽

pp. 3934-3942 ◽

Cited By ~ 2

Author(s):

C. D. Miranda ◽

C. A. López ◽

J. C. Pedregosa ◽

J. A. Alonso

Keyword(s):

Ionic Conductivity ◽

Double Perovskite ◽

Ion Conductivity ◽

Oxide Ion Conductivity ◽

Nb Doping ◽

Oxide Ion

We report a substantial enhancement of the oxide-ion conductivity in Sr11Mo4O23 achieved by Nb doping the Mo sites.

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High oxide-ion conductivity through the interstitial oxygen site in Ba7Nb4MoO20-based hexagonal perovskite related oxides

Nature Communications ◽

10.1038/s41467-020-20859-w ◽

2021 ◽

Vol 12 (1) ◽

Cited By ~ 1

Author(s):

Masatomo Yashima ◽

Takafumi Tsujiguchi ◽

Yuichi Sakuda ◽

Yuta Yasui ◽

Yu Zhou ◽

...

Keyword(s):

Fuel Cells ◽

Ion Conductivity ◽

Interstitial Oxygen ◽

Stability Range ◽

Oxide Ion Conductivity ◽

Strong Motivation ◽

Oxide Ion Conductors ◽

Oxide Ion ◽

Oxygen Site ◽

Ion Conductors

AbstractOxide-ion conductors are important in various applications such as solid-oxide fuel cells. Although zirconia-based materials are widely utilized, there remains a strong motivation to discover electrolyte materials with higher conductivity that lowers the working temperature of fuel cells, reducing cost. Oxide-ion conductors with hexagonal perovskite related structures are rare. Herein, we report oxide-ion conductors based on a hexagonal perovskite-related oxide Ba7Nb4MoO20. Ba7Nb3.9Mo1.1O20.05 shows a wide stability range and predominantly oxide-ion conduction in an oxygen partial pressure range from 2 × 10−26 to 1 atm at 600 °C. Surprisingly, bulk conductivity of Ba7Nb3.9Mo1.1O20.05, 5.8 × 10−4 S cm−1, is remarkably high at 310 °C, and higher than Bi2O3- and zirconia-based materials. The high conductivity of Ba7Nb3.9Mo1.1O20.05 is attributable to the interstitial-O5 oxygen site, providing two-dimensional oxide-ion O1−O5 interstitialcy diffusion through lattice-O1 and interstitial-O5 sites in the oxygen-deficient layer, and low activation energy for oxide-ion conductivity. Present findings demonstrate the ability of hexagonal perovskite related oxides as superior oxide-ion conductors.

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Structure and oxide ion conductivity in tetragonal tungsten bronze BaBiNb5O15

RSC Advances ◽

10.1039/c5ra10635d ◽

2015 ◽

Vol 5 (88) ◽

pp. 71890-71895 ◽

Cited By ~ 8

Author(s):

Hongqiang Ma ◽

Kun Lin ◽

Longlong Fan ◽

Yangchun Rong ◽

Jun Chen ◽

...

Keyword(s):

Electrical Conductivity ◽

Tungsten Bronze ◽

Ion Conductivity ◽

Tetragonal Tungsten Bronze ◽

Ion Conductor ◽

Oxide Ion Conductor ◽

Oxide Ion Conductivity ◽

Total Electrical Conductivity ◽

New Type ◽

Oxide Ion

Tetragonal tungsten bronze compound, BaBiNb5O15, is found to be a new type of oxide ion conductor with a total electrical conductivity of 3 × 10−4 S cm−1 at 600 °C.

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Ionic Conductivity Study on the New High Oxide Conducting Perovskite LaGaO3

MRS Proceedings ◽

10.1557/proc-527-503 ◽

1998 ◽

Vol 527 ◽

Author(s):

G.V.M. Kiruthika ◽

U.V. Varadaraju

Keyword(s):

Activation Energy ◽

Ionic Conductivity ◽

Single Phase ◽

Ion Conductivity ◽

Lanthanum Gallate ◽

Migration Energy ◽

Ion Migration ◽

Oxide Ion Conductivity ◽

Unit Cell Size ◽

Oxide Ion

ABSTRACTOxide ion conductivity studies have been done on the Lanthanum Gallate based compounds. Yttrium substitution at the Ga site has been attempted to increase the unit cell size. Single phase was obtained for limited Y substituion i.e., La0.9Sr0.1Ga0.7Y0.1Mg0.2O3-x. It is found that the activation energy for the oxide ion conductivity has decreased for this composition. Based on the tolerance factor and B-site radius values, the migration energies were obtained for the LaGaO3 based perovskites. It is observed that migration energy has been significantly reduced upon substitution at the B-site. Absence of an enhancement in the conductivity with Yttrium substitution could be due to the vaccancy ordering inhibiting the oxide ion migration.

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