Viscoelastic inorganic glass as solid-state electrolyte for batteries

Abstract

A most recent exciting research result in the area of solid-state batteries that has been accepted for publication by the journal Nature Energy is highlighted. The research designed a new type of inorganic solid electrolyte named “viscoelastic inorganic glass (VIGLAS)” electrolyte with the compositions of LiAlCl2.5O0.75 and NaAlCl2.5O0.75. The newly developed solid electrolyte material showcases an exceptional degree of deformability at room temperature, high ionic conductivity (>1 mS/cm at room temperature) and high oxidation stability (up to 4.3 V vs. Li+/Li or Na+/Na). Using it as a catholyte enables a facile fabrication and a stable operation under practical stack pressure (＜0.1 MPa) of all-solid-state batteries. VIGLAS represents a new path in the design of promising solid electrolytes for realizing high performance all-solid-state batteries.