Аnionic doping (F−, Cl−) as the method for improving transport properties of proton-conducting perovskites based on Ba2CaNbO5.5

Аnionic doping (F−, Cl−) as the method for improving transport properties of... The novel Cl−-doped compound based on oxygen deficient double perovskite Ba2CaNbO5.5 was synthesized Ba2CaNbO5.48Cl0.05 and its structure, thermal properties, hydration behavior and electrical properties have been investigated. It was found that introduction of Cl− ions leads to the increasing of oxygen ion and proton conductivities. The appearance of donor defect Clo (or Fo) decreases the activation energy for oxygen ion transport and increases the mobility of oxygen vacancies due to electrostatic repulsion between the positive charged defects Vo and Clo (Fo). It was shown that Cl−-doping decreases proton concentration but enhances proton conductivity due to significant increase in proton mobility. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Аnionic doping (F−, Cl−) as the method for improving transport properties of proton-conducting perovskites based on Ba2CaNbO5.5

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2018.01.001
Publisher site
See Article on Publisher Site

Abstract

The novel Cl−-doped compound based on oxygen deficient double perovskite Ba2CaNbO5.5 was synthesized Ba2CaNbO5.48Cl0.05 and its structure, thermal properties, hydration behavior and electrical properties have been investigated. It was found that introduction of Cl− ions leads to the increasing of oxygen ion and proton conductivities. The appearance of donor defect Clo (or Fo) decreases the activation energy for oxygen ion transport and increases the mobility of oxygen vacancies due to electrostatic repulsion between the positive charged defects Vo and Clo (Fo). It was shown that Cl−-doping decreases proton concentration but enhances proton conductivity due to significant increase in proton mobility.

Journal

Solid State IonicsElsevier

Published: Apr 1, 2018

References

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