Nominally stoichiometric Na₃(W_<i>x</i>Si_<i>x</i>Sb_{1−2<i>x</i>})S₄ as a superionic solid electrolyte

Abstract

Nominally stoichiometric Na 3 W x Si x Sb 1−2 x S 4 is presented as Na + -conducting solid-state electrolytes. When x = 0.2, it shows the highest ionic conductivity of 13.2 mS cm −1 , despite the absence of intentionally incorporated Na + vacancies.