Synthesis of cubic Na<sub>3</sub>SbS<sub>4</sub> solid electrolyte with enhanced ion transport for all-solid-state sodium-ion batteries

Journal article (2018)

Authors

Dechao Zhang Yanshan University
Xiaoting Cao Yanshan University
Long Zhang Yanshan University
Di Xu Yanshan University
Ning Wang Yanshan University
C. Yu RST/Fundamental Aspects of Materials and Energy - AS
Wentao Hu Yanshan University
Xinlin Yan Technische Universität Wien
Jianli Mi Jiangsu University
Bin Wen Yanshan University
Limin Wang Yanshan University
Research Group
QRD/Kouwenhoven Lab (QuTech Advanced Research Centre) (TU Delft)
Phase transition Solid electrolytes Sodium-ion batteries Sulphides All-solid-state batteries
More Info
expand_more

Published Date

2018

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

QuTech Advanced Research Centre

Department

Qubit Research Division

Research Group

QRD/Kouwenhoven Lab

Abstract

A comprehensive research coupling experiment and computation has been performed to understand the phase transition of Na3SbS4 and to synthesize cubic Na3SbS4 (c-Na3SbS4), a high temperature phase of Na3SbS4 that is difficult to be preserved when cooled down to ambient temperature. The formation of c-Na3SbS4 is verified by Rietveld refinement, nuclear magnetic resonance spectroscopy as well as electrochemical impedance spectroscopy. Unlike tetragonal Na3SbS4 (t-Na3SbS4) appearing phase transition at high temperature, c-Na3SbS4 is stable not just at room temperature but also sustaining thermal cycling up to at least 200 °C. Both experiment and theoretical calculation reveal that the ionic conductivity of c-Na3SbS4 is higher than that of t-Na3SbS4, though the values are in the same order of magnitude. Both structures allow fast ion transport. All-solid-state cells with c-Na3SbS4 solid electrolyte demonstrate superior Coulombic efficiency, high specific capacity, and relatively good cycling stability. Na3SbS4 solid electrolyte is promising for all-solid-state sodium-ion batteries.