NDLI: Preparation and characterization of sodium binary system (NaI–Na$_{3}$PO$

Content Provider	SpringerLink
Author	Ahmad, A. H. Hassan, N. Abrani, M. A.
Copyright Year	2013
Abstract	New binary inorganic salt such as sodium iodide (NaI)–sodium phosphate (Na$_{3}$PO$_{4}$) has a great potential to be used as a solid electrolyte, and this solid electrolyte system exhibits high ionic conductivity up to 10$^{−4}$ S cm$^{−1}$. The solid electrolyte compounds were prepared by mechanical milling followed by pelletizing and sintering at low temperature. The electrical conductivity study was carried out as a function of NaI concentration by impedance spectroscopy technique and the maximum conductivity of (1.02 ± 0.19) × 10$^{−4}$ S cm$^{−1}$ at room temperature was obtained for the composition 0.50 NaI:0.50 Na$_{3}$PO$_{4}$. The increase in conductivity is probably due to the increase in number of mobile charge carriers through the conducting pathway provided by tetrahedral structures of Na$_{3}$PO$_{4}$. The presence of P–O and PO$_{4}$ $^{3−}$ bands was detected by the infrared technique Fourier transform infrared spectroscopy had been shifted indicating changes in polyhedral structure which in turn led to the formation of conducting channel by corner sharing or through edges. The mobility of the charge carriers in the various compositions of the binary system was investigated by using $^{23}$Na magic angle spinning solid-state nuclear magnetic resonance. The narrowing of the line width $^{23}$Na spectra in the optimum composition of the binary NaI–Na$_{3}$PO$_{4}$ system can be assigned to Na population with higher ion mobility. X-ray diffraction technique revealed that the addition of NaI resulted in reducing the crystallinity of the samples. Field emission scanning electron microscopy micrographs revealed finer microstructure of the milling samples with grains growth formation and densification upon sintering.
Starting Page	389
Ending Page	397
Page Count	9
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	20
Issue Number	3
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-09-11
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Sodium solid electrolyte Ionic conductivity Impedance spectroscopy Solid-state nuclear magnetic resonance Fourier transform infrared spectroscopy X-ray diffraction Field emission scanning electron microscopy Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Chemical Engineering Materials Science

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