Superionic Conductivity in Sodium Zirconium Chloride-Based Compounds

All-solid-state sodium batteries are attracting intensive attention, and chloride-based solid electrolytes are promising candidates for use in such batteries because of their high chemical stability and low Young's modulus. Here, we report new superionic conductors based on polyanion-added chlo...

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Bibliographic Details
Published in:Chemistry : a European journal 2023-09, Vol.29 (52), p.e202301586
Main Authors: Inoishi, Atsushi, Nojima, Akinobu, Tanaka, Maika, Suyama, Miyuki, Okada, Shigeto, Sakaebe, Hikari
Format: Article
Language:English
Subjects:
Amorphous materials
Chemistry
Chlorides
Conduction
Conductivity
Conductors
Electrochemistry
Electronegativity
Ion currents
Mechanical properties
Modulus of elasticity
Molten salt electrolytes
Polyelectrolytes
Room temperature
Sodium
Solid electrolytes
Zirconium
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Summary:All-solid-state sodium batteries are attracting intensive attention, and chloride-based solid electrolytes are promising candidates for use in such batteries because of their high chemical stability and low Young's modulus. Here, we report new superionic conductors based on polyanion-added chloride-based materials. Na Zr(SO ) Cl showed a high ionic conductivity of 1.6 mS cm at room temperature. X-ray diffraction analysis indicated that the highly conducting materials are mainly a mixture of an amorphous phase and Na ZrCl . The conductivity might be dominated by the electronegativity of the central atom of the polyanion. Electrochemical measurements reveal that Na Zr(SO ) Cl is a sodium ionic conductor and is suitable for use as a solid electrolyte in all-solid-state sodium batteries.
ISSN:0947-6539
1521-3765
1521-3765
DOI:10.1002/chem.202301586