Stabilizing the Interface between Sodium Metal Anode and Sulfide-Based Solid-State Electrolyte with an Electron-Blocking Interlayer

Pu Hu; Ye Zhang; Xiaowei Chi; Karun Kumar Rao; Fang Hao; Hui Dong; Fangmin Guo; Yang Ren; Lars C Grabow; Yan Yao

doi:10.1021/acsami.8b19984

Stabilizing the Interface between Sodium Metal Anode and Sulfide-Based Solid-State Electrolyte with an Electron-Blocking Interlayer

ACS Appl Mater Interfaces. 2019 Mar 13;11(10):9672-9678. doi: 10.1021/acsami.8b19984. Epub 2019 Mar 1.

Authors

Pu Hu¹, Ye Zhang¹, Xiaowei Chi¹, Karun Kumar Rao^{2

3}, Fang Hao¹, Hui Dong¹, Fangmin Guo⁴, Yang Ren⁴, Lars C Grabow^{2

3}, Yan Yao^{1

2

3}

Affiliations

¹ Department of Electrical and Computer Engineering and Materials Science and Engineering Program , University of Houston , Houston , Texas 77204 , United States.
² Department of Chemical and Biomolecular Engineering , University of Houston , Houston , Texas 77204 , United States.
³ Texas Center for Superconductivity at the University of Houston , Houston , Texas 77204 United States.
⁴ X-ray Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States.

PMID: 30807092
DOI: 10.1021/acsami.8b19984

Abstract

Sulfide-based Na-ion conductors are promising electrolytes for all-solid-state sodium batteries (ASSSBs) because of high ionic conductivity and favorable formability. However, no effective strategy has been reported for long-duration Na cycling with sulfide-based electrolytes because of interfacial challenges. Here we demonstrate that a cellulose-poly(ethylene oxide) (CPEO) interlayer can stabilize the interface between sulfide electrolyte (Na₃SbS₄) and Na by shutting off the electron pathway of the electrolyte decomposition reaction. As a result, we achieved stable Na plating/stripping for 800 cycles at 0.1 mA cm^-2 in all-solid-state devices at 60 °C.

Keywords: Na metal anode; Na3SbS4; interfacial stability; polymer composite interlayer; sulfide-based solid electrolyte.