Press Releases | July 6, 2021

For the development of all-solid-state sodium-ion batteries with long-term stability

A research team from the Department of Electrical and Electronic Information Engineering at Toyohashi University of Technology developed a chlorine (Cl) substituted Na₃SbS₄ solid electrolyte for use in all-solid-state sodium (Na) ion batteries. Compared to the sample without a Cl substitution, the ionic conductivity of the Na₃SbS₄ solid electrolyte where sulfur (S) was partially substituted with Cl improved by up to three times. The team also demonstrated that the Cl-substituted Na₃SbS₄ has a crystal structure framework that allows Na ions to move easier in three dimensions, and they discovered that the Cl substitution showed superior stability with Na metal anodes.

Full text: Sodium solid electrolyte combining high conductivity with electrochemical stability
TUT website: Press release