Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries
The NASICON (Na Super Ionic CONductors)-type materials are good ionic conductors when serving as solid electrolytes for lithium–ion batteries. In this paper, Nb-doped LiTi2(PO4)3 has been synthesized by solid-state reaction method and the structural, vibrational and dielectric studies are systematic...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Taylor & Francis Group
2018-04-01
|
Series: | Journal of Asian Ceramic Societies |
Subjects: | |
Online Access: | http://dx.doi.org/10.1080/21870764.2018.1439784 |
id |
doaj-061b03ccceef4f0bbccc72665a9f2a0d |
---|---|
record_format |
Article |
spelling |
doaj-061b03ccceef4f0bbccc72665a9f2a0d2021-05-02T07:56:33ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642018-04-016210912010.1080/21870764.2018.14397841439784Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteriesM. Koteswara Rao0K. Vijaya Babu1V. Veeraiah2K. Samatha3Andhra UniversityAndhra UniversityAndhra UniversityAndhra UniversityThe NASICON (Na Super Ionic CONductors)-type materials are good ionic conductors when serving as solid electrolytes for lithium–ion batteries. In this paper, Nb-doped LiTi2(PO4)3 has been synthesized by solid-state reaction method and the structural, vibrational and dielectric studies are systematically investigated. The X-ray diffraction conforms that the Nb-doped LiTi2(PO4)3 compound has NASICON structure, i.e. rhombohedral with space group R-3c. The average crystallite size and lattice constant are increased with dopant concentration. The grain sizes of the synthesized compounds are investigated by scanning electron microscope and it is found to be in the range of 5 μm. From Fourier-transform infrared spectroscopy spectra, stretching vibrations of P-O-P bond are identified in the region of 700–750 cm−1. AC electrical study is carried out by exploiting the impedance and dielectric spectroscopy. The activation energy increases with dopant concentration since ion diffusion becomes easy as the volume fraction of the grain increases. Non-Debye behavior of conductivity relaxation is reflected in the modulus analysis.http://dx.doi.org/10.1080/21870764.2018.1439784Lithium titanium phosphatesuperionic conductorsX-RDSEMalternating currentcyclic voltammetry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M. Koteswara Rao K. Vijaya Babu V. Veeraiah K. Samatha |
spellingShingle |
M. Koteswara Rao K. Vijaya Babu V. Veeraiah K. Samatha Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries Journal of Asian Ceramic Societies Lithium titanium phosphate superionic conductors X-RD SEM alternating current cyclic voltammetry |
author_facet |
M. Koteswara Rao K. Vijaya Babu V. Veeraiah K. Samatha |
author_sort |
M. Koteswara Rao |
title |
Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries |
title_short |
Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries |
title_full |
Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries |
title_fullStr |
Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries |
title_full_unstemmed |
Effect of Nb substitution on structural, electrical and electrochemical properties of LiTi2(PO4)3 as electrolyte materials for lithium ion batteries |
title_sort |
effect of nb substitution on structural, electrical and electrochemical properties of liti2(po4)3 as electrolyte materials for lithium ion batteries |
publisher |
Taylor & Francis Group |
series |
Journal of Asian Ceramic Societies |
issn |
2187-0764 |
publishDate |
2018-04-01 |
description |
The NASICON (Na Super Ionic CONductors)-type materials are good ionic conductors when serving as solid electrolytes for lithium–ion batteries. In this paper, Nb-doped LiTi2(PO4)3 has been synthesized by solid-state reaction method and the structural, vibrational and dielectric studies are systematically investigated. The X-ray diffraction conforms that the Nb-doped LiTi2(PO4)3 compound has NASICON structure, i.e. rhombohedral with space group R-3c. The average crystallite size and lattice constant are increased with dopant concentration. The grain sizes of the synthesized compounds are investigated by scanning electron microscope and it is found to be in the range of 5 μm. From Fourier-transform infrared spectroscopy spectra, stretching vibrations of P-O-P bond are identified in the region of 700–750 cm−1. AC electrical study is carried out by exploiting the impedance and dielectric spectroscopy. The activation energy increases with dopant concentration since ion diffusion becomes easy as the volume fraction of the grain increases. Non-Debye behavior of conductivity relaxation is reflected in the modulus analysis. |
topic |
Lithium titanium phosphate superionic conductors X-RD SEM alternating current cyclic voltammetry |
url |
http://dx.doi.org/10.1080/21870764.2018.1439784 |
work_keys_str_mv |
AT mkoteswararao effectofnbsubstitutiononstructuralelectricalandelectrochemicalpropertiesofliti2po43aselectrolytematerialsforlithiumionbatteries AT kvijayababu effectofnbsubstitutiononstructuralelectricalandelectrochemicalpropertiesofliti2po43aselectrolytematerialsforlithiumionbatteries AT vveeraiah effectofnbsubstitutiononstructuralelectricalandelectrochemicalpropertiesofliti2po43aselectrolytematerialsforlithiumionbatteries AT ksamatha effectofnbsubstitutiononstructuralelectricalandelectrochemicalpropertiesofliti2po43aselectrolytematerialsforlithiumionbatteries |
_version_ |
1721493810390761472 |