# Investigation of structural, morphology, dielectric relaxation, and conduction mechanism of sodium diphosphate ε Na4P2O7 compound

Investigation of structural, morphology, dielectric relaxation, and conduction mechanism of... The physical properties of the sodium diphosphate ε\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\upvarepsilon$$\end{document} Na4P2O7 ceramic were investigated by X-ray diffraction (XRD), morphology, dielectric, and electrical measurements. Rietveld refinements of X-ray diffraction (XRD) data show that the compound crystallizes in the orthorhombic structure belonging to the space group Pmmm. Not only were the AC conductivity of our compound carried out at different temperatures and frequencies, but also its electrical modulus was evaluated, as well as the dielectric relaxation. On the other hand, the behavior of frequency exponent s of AC conductivity as a function of temperature is reasonably well interpreted by the correlated barrier hopping (CBH). In terms of CBH model, the values of maximum barrier height, hopping distance, and density of localized states are determined and discussed. A correlation between electrical and structural properties was also studied. Besides, the present results provide insights into the exploitation of sodium diphosphate ε\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\upvarepsilon$$\end{document} Na4P2O7 as a promising cathode material for application in sodium-ion batteries. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

# Investigation of structural, morphology, dielectric relaxation, and conduction mechanism of sodium diphosphate ε Na4P2O7 compound

, Volume 28 (3) – Mar 1, 2022
11 pages

/lp/springer-journals/investigation-of-structural-morphology-dielectric-relaxation-and-6AxgHBdj20
Publisher
Springer Journals
Copyright © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-022-04438-1
Publisher site
See Article on Publisher Site

### Abstract

The physical properties of the sodium diphosphate ε\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\upvarepsilon$$\end{document} Na4P2O7 ceramic were investigated by X-ray diffraction (XRD), morphology, dielectric, and electrical measurements. Rietveld refinements of X-ray diffraction (XRD) data show that the compound crystallizes in the orthorhombic structure belonging to the space group Pmmm. Not only were the AC conductivity of our compound carried out at different temperatures and frequencies, but also its electrical modulus was evaluated, as well as the dielectric relaxation. On the other hand, the behavior of frequency exponent s of AC conductivity as a function of temperature is reasonably well interpreted by the correlated barrier hopping (CBH). In terms of CBH model, the values of maximum barrier height, hopping distance, and density of localized states are determined and discussed. A correlation between electrical and structural properties was also studied. Besides, the present results provide insights into the exploitation of sodium diphosphate ε\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\upvarepsilon$$\end{document} Na4P2O7 as a promising cathode material for application in sodium-ion batteries.

### Journal

IonicsSpringer Journals

Published: Mar 1, 2022

Keywords: Sodium pyrophosphate; XRD; MEB; Impedance spectroscopy; AC conductivity; Conduction mechanism; CBH model

### References

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